Academic literature on the topic 'Seedling height'
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Journal articles on the topic "Seedling height"
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Struve, Daniel, Petra Sternberg, Nick Drunasky, Kurt Bresko, and Rico Gonzalez. "Growth and Water Use Characteristics of Six Eastern North American Oak (Quercus) Species and the Implications for Urban Forestry." Arboriculture & Urban Forestry 32, no. 5 (2006): 202–13. http://dx.doi.org/10.48044/jauf.2006.026.
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Seedling growth and water use of six North American oak species were studied in a series of four experiments to determine inter- and intraspecies water use characteristics. Xeric-site adapted species (chestnut oak, Q. prinus [L.] and black oak, Q. velutina [Lamb.]) had slower growth (height and dry weight accumulation and lower shoot:root ratios) than mesic-site adapted species (bur oak, Quercus macrocarpus [Michx.]; pin oak, Q. palustris [Muenchh.], northern red oak, Q. rubra [L]; and Shumard oak, Q. shumardii [Buckl.]). Principal component analysis (a statistical technique used to identify correlated variables) using 11 variables found that seedling water use loaded positively with seedling growth factors (taller seedlings tended to have higher dry weights and greater leaf and root areas and used more water than shorter seedlings, which tended to have lower dry weights, smaller leaf, and root areas) in the first principal component. However, in the third experiment, seedling growth factors loaded negatively with seedling water use for Q. prinus. Tall Q. prinus seedlings tended to use less water than short seedlings. However, other measures of water use (g water cm −1height and cm −2leaf and root area) loaded negatively on the first principal component. Correlations between seedling heights and seedling waters use were significant and positive, but great within-species and within half-sib family differences in height-adjusted water use (g water cm −1height) were found. By plotting height-adjusted water use against seedling height, efficient and inefficient water use seedlings could be identified. Inefficient water use seedlings were shorter and had higher water use cm −1height than efficient water use seedlings. Inefficient water use seedlings were described as having a xeric-water use habit, whereas tall seedlings had a mesic-water use habit. Potentially, height-adjusted water use could be used as a method for selecting individual oak seedlings better adapted to stressful urban planting sites.
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Tuttle, C. L., D. B. South, M. S. Golden, and R. S. Meldahl. "Initial Pinustaeda seedling height relationships with early survival and growth." Canadian Journal of Forest Research 18, no. 7 (1988): 867–71. http://dx.doi.org/10.1139/x88-133.
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Initial planting height of loblolly pine (Pinustaeda L.) seedlings from several nurseries and seed sources was related to survival and height growth on "good" and "poor" planting chances in Alabama. A planting chance was classified as poor if 2-year survival was less than 75% and total 2-year height growth was less than 75 cm. Seedling height (measured immediately following planting) was negatively related to survival, and the slope of the regression was four times greater when the planting chance was classified as poor than when it was classified as good. Initial height was also negatively related to 2-year height growth on poor planting chances, with shorter seedlings at planting reaching the same total height as taller ones after two seasons. As a result, initial field height on poor planting chances had little impact on total seedling height after two growing seasons. Therefore, there was no height growth advantage gained by planting seedlings taller than 20 cm when survival was less than 75%. Planting seedlings with heights of 20–34 cm was less of a problem when the planting chance was good. The use of shorter seedlings on planting chances where low survival may be expected may significantly increase loblolly pine seedling survival in the southern United States.
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Harayama, Hisanori, Ikutaro Tsuyama, Mitsutoshi Kitao, et al. "Effects of Seedling Size, Stock Type, and Mechanical Site Preparation Method on Initial Survival and Growth of Japanese Larch (Larix kaempferi) Seedlings." Forests 14, no. 4 (2023): 784. http://dx.doi.org/10.3390/f14040784.
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It is important to understand the characteristics of Japanese larch (Larix kaempferi) seedlings that allow them to grow vigorously after planting and quickly exceed the height of surrounding vegetation, resulting in lower weeding costs. Seven stock types, including bareroot and container-grown seedlings, were planted in two plots with different mechanical-site-preparation (MSP) methods and evaluated for survival, height, and root collar diameter (RCD) for four consecutive years. Three-year-old bareroot seedlings, which were one year older and larger than normal, had low survival rates in the mulcher MSP. Initial seedling height significantly differed among the seven stock types, while almost no significant differences were observed after four growing seasons. Model analyses showed that initial seedling height and RCD had a significant effect on seedling height after planting until the second growing season, while the effect of planted seedling age and plot became increasingly significant after the third growing season. The difference in seedling type, bareroot versus container-grown seedlings, had no effect on the seedling height during the four growing seasons after planting. A decision tree analysis suggests that the seedlings with sufficiently large RCD and young age, regardless of seedling type, can grow taller than surrounding vegetation more quickly.
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Marohnic, Jennifer, and Robert L. Geneve. "Container Volume and Height Affect Shoot and Root Development in Marigold Seedlings." HortScience 30, no. 4 (1995): 868B—868. http://dx.doi.org/10.21273/hortsci.30.4.868b.
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Marigold seedlings were grown in four containers that differed in both volume and shape. Seedlings grown in 1.5-gal containers showed the greatest potential for shoot and root development 20 days after sowing. These seedlings had greater leaf area, shoot and root dry weight, and total root number and length compared to seedlings grown in 406 plug trays, 72-cell packs, or 6-inch containers. There was a positive correlation (r2 = 0.81) between cell volume and seedling growth as well as a positive correlation (r2 = 0.89) between container height with seedling growth. An attempt was made to separate the impact of container volume vs. container height on seedling growth. Containers were designed using acrylics to vary the container height while keeping the volume constant at 1500 cm3. There was a positive correlation (r2 = 0.87) between shoot and root dry weight with container height. The data suggest that both container volume and height contribute to overall seedling growth in marigold, but when container volume is not limiting, container height has a large impact on seedling development.
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Zhou, Fei, Nianjin Wang, Jinping Zhang, et al. "Formulation of substrates with agricultural and forestry wastes for Camellia oleifera Abel seedling cultivation." PLOS ONE 17, no. 7 (2022): e0265979. http://dx.doi.org/10.1371/journal.pone.0265979.
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Five Camellia oleifera Abel seedling substrates were prepared using the conventional formula, but with the peat substituted by the composts of Camellia oleifera shell, pine chips, palm fiber residues, chicken manure, and sheep manure. The physical and chemical properties of the prepared substrates before and after seedling cultivation were determined and their effects on the growth of Camellia oleifera seedling were analyzed. It was found that the survival rates of the one-year-old seedlings produced from stem cuttings on all substrates at 6 months were greater than 97.5%. As compared with the conventional substrate, the substrates formulated with the composts were able to promote the seedling growth based upon height, ground diameter, root length and root volume measurement. The substrate prepared with the compost of Camellia oleifera shell+ palm fiber residue+ chicken manure (A3), vermiculite and perlite (6:3:1) was the most optimal, which gave 100% seedling survival rate, the greatest seedling height, and the largest ground diameter. In particular, the ground diameters and 26.67% of the seedling heights reached the grade 1 standard for two-year-old seedlings.
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Ratna, Ratna Damayanti Siantur, and Dede J. Sudrajat Dede. "Correlation of Morphological Characteristics of Nyamplung Seedling (Calophyllum inophyllum L) with The Performance at Field Condition." Jurnal Wasian 6, no. 1 (2019): 45–55. http://dx.doi.org/10.62142/0fpen224.
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The aim of this research is to assess the correlation of morphological characteristics of nyamplung seedling (Calophyllum inophyllum L) on field growth of two years age after outplanting in Parungpanjang, Bogor. Three seedlots collected from Carita, Pangandaran and Purworejo were grown in seedbeds with different ages (four months and six months). The seedlings are mixed and grouped according to their height and root collar diameter. Each group of seedlings is divided into 5 height classes and each class is divided into two diameter classes, so there are 10 classes of seed morphology. The parameters of seedling were observed on sturdirness quotient, dry weight, root length, shoot-root ratio, and number of leaves. The seedlings were planted in randomized completely block design (three seeds origins, 10 morphological class, three blocks, 30 seedlings per block). Seedling survival, height, and root collar diameter growth were assessed on two years after outplanting. The result showed that morphological classification affected on seedling survival, height and root collar diameter growth. Seedling height and root collar diameter were significantly correlated with other parameters and also with field growth. Two-year-old Nyamplung on field can grow significantly if we use seedling with a height above 31 cm and a diameter more than 5.1 mm. In addition, the ratio of height and diameter and seed quality index are become important consideration in seed selection.
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Ekamawanti, Hanna Artuti, Lenawati Simanjuntak, and Abdurrani Muin. "Assessment of the Physical Quality of Eucalyptus pellita Seedlings from Shoot Cutting by Age Level." Jurnal Sylva Lestari 9, no. 2 (2021): 280. http://dx.doi.org/10.23960/jsl29280-290.
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The criteria for target seedling of Eucalyptus pellita F. Muell are at least 90days old, with consequences for the length of stay of the seedlings in the nursery. This study must assess the suitability as a target seedling first if it wants to plant the seedlings under 90days old in the field. The research aimed to evaluate and obtain the regression equation for the seedling’s age with the seedling’s morphological characters. The shoot seedlings cuttings aged 45, 60, 75, and 90 days after planting in the cocopeat growing medium were assessed. The study was used a survey method with a purposive sampling technique to obtain 60 samples by assessing the growth and appearances of the seedling. Furthermore, 15 samples were taken at random to determine the dry weight of the seedlings. Seedlings aged 75 and 90 days indicated the standard criteria as target seedlings for height, diameter, number of leaves, seedling’s health, shoot appearances, and seedling roots. The two seedlings’age levels have a sturdiness index of 8.34-9.78; shoot-root ratio 3.9-4.5; and seedling quality index (SQI) 0.22-0.23. Seedling age had a powerful positive correlation with the sturdiness index and SQI (r = 0.84 and r = 0.96). The regression equation of the sturdiness index is y = 0.048x + 5.435 (R2 = 0.996) and SQI is y = 0.004x - 0.064 (R2 = 0.926). This research implies that 75 and 90-days seedlings can be considered as one of the criteria for the age of E. pellita shoot cuttings as the target seedling in the SOP of PT. Finnantara Intiga.Keywords: cocopeat, Eucalyptus pellita, Seedling Quality index, shoot cuttings, target seedling
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Minore, Don, and Howard G. Weatherly. "Effects of Site Preparation on Douglas-Fir Seedling Growth and Survival." Western Journal of Applied Forestry 5, no. 2 (1990): 49–51. http://dx.doi.org/10.1093/wjaf/5.2.49.
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Abstract The effects of five yarding-slash treatment combinations on Douglas-fir (Pseudotsuga menziesii) growth and survival were compared by obtaining seedling heights, potential seedling heights, survival percentages, soil-penetration resistances, and the occurrence of visible soil-humus for 149 progeny-test plantations in western Oregon. Survival was not improved by mechanical site preparation, and seedlings grown on the compacted, low-humus soils associated with piling slash off site did not grow as tall during their first 5 years as seedlings growing on similar sites where slash had been broadcast-burned. Tilling (disking or ripping) did not benefit seedling height growth. West. J. Appl. For. 5(2):49-51, April 1990.
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Conner, Patrick. "Effect of Nitrogen Fertigation on First-year Pecan Seedling Growth." HortTechnology 17, no. 4 (2007): 491–95. http://dx.doi.org/10.21273/horttech.17.4.491.
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Pecan (Carya illinoinensis) seedling rootstocks require several years of growth in the nursery before they are large enough to graft. In this experiment, first-year pecan seedlings were fertigated with varying amounts of calcium nitrate in an attempt to stimulate growth rates. Pecan seedlings were fertigated every 2 weeks from May through October for a total of 10 applications. Total amounts of nitrogen (N) applied by fertigation were 0, 4, 10, 20, and 40 g of N per seedling. Leaf samples were taken after the fourth and tenth fertigations, and leaf elemental concentration was affected by fertigation rates. Seedling height and caliper were measured monthly. Seedling caliper continued to increase throughout the experiment, whereas height increase stopped in September. Seedling height and caliper were unaffected by N fertigation except for the N rate of 40 g, which suppressed seedling growth. These results suggest that the N needs of the seedlings were met by a preplant application of 50 lb/acre N applied as 10N–4.4P–8.3K.
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Conner, Patrick. "(130) Effects of Nitrogen Fertigation on First-year Pecan Seedling Growth." HortScience 41, no. 4 (2006): 1062D—1062. http://dx.doi.org/10.21273/hortsci.41.4.1062d.
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Pecan seedling rootstocks require several years of growth in the nursery before they are large enough to graft. In this experiment, first-year pecan seedlings were fertigated with varying amounts of calcium nitrate to stimulate growth rates. Pecan seedlings were fertigated every 2 weeks from May through October for a total of 10 applications. Total amounts of nitrogen (N) applied by fertigation were 0, 4, 10, 20, and 40 g of N per seedling. Leaf samples were taken after the fourth and 10th fertigation, and leaf elemental concentration was affected by fertigation rates. Seedling height and caliper were measured monthly. Seedling caliper continued to increase throughout the experiment, while height increase stopped in September. Seedling height and caliper were not affected by N fertigation except for the N rate of 40 g, which suppressed seedling growth. These results suggest that the nitrogen needs of the seedlings were met by a preplant application of 56 kg·ha-1 N applied as 10N–10P–10K.
Dissertations / Theses on the topic "Seedling height"
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Magnitskiy, Stanislav V. "Controlling seedling height by treating seeds with plant growth regulators." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1101741472.
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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xix, 157 p.; also includes graphics. Includes bibliographical references (p. 147-157).
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Paiva, Auricleia Sarmento de. "Disponibilidade hídrica na germinação de sementes e no crescimento de plântulas da leguminosa forrageira Macrotyloma axillare (E. Mey) Verdc. cv. Java /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/105113.
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Resumo: Objetivou-se avaliar características fisiológicas da leguminosa forrageira tropical, Macrotyloma axillare cv. Java (macrotiloma) submetida a diferentes potenciais hídricos e determinar a qualidade fisiológica de três lotes de sementes dessa cultivar. Determinou-se a pureza física dos lotes, o peso de mil sementes, o teste padrão de germinação (TPG) e o índice de velocidade de germinação (IVG). Os seguintes testes de vigor foram realizados: primeira contagem do TPG, condutividade elétrica e envelhecimento acelerado. Avaliou-se o efeito da disponibilidade hídrica do substrato sobre a germinação de sementes com o uso de soluções de Polietileno Glicol (PEG 6000) e a germinação e o crescimento inicial das plântulas sob diferentes disponibilidades hídricas no solo (60, 45 e 35% da capacidade de campo). Diferenças no potencial fisiológico inicial de sementes escarificadas puderam ser observadas pelo teste de germinação. Os testes de primeira contagem e IVG não foram sensíveis para detectar diferenças no potencial fisiológico das sementes dos três lotes estudados. O envelhecimento acelerado das sementes escarificadas pode ser realizado a 41º C por um período mínimo de 72 horas ou a 45º C durante 48 horas. O teste de condutividade elétrica mostrou-se adequado para diferenciar os lotes de sementes escarificadas, a partir de 48 horas de embebição. O lote 3 foi classificado como o lote de menor vigor. Houve redução progressiva e significativa da porcentagem de germinação e do IVG quando o potencial hídrico do substrato decresceu de 0,0 até -0,6 MPa e decréscimo na germinação e no IVG quando a disponibilidade hídrica no solo decresceu de 60% para 45 e 35% da capacidade de campo. Todas as características da parte aérea das plântulas foram prejudicadas pela redução da disponibilidade hídrica do solo, notadamente, os parâmetros altura de plântula,... (Resumo completo, clicar acesso eletrônico abaixo)<br>Abstract: The objective of this research was to evaluate physiological characteres of the tropical forage legume, Macrotyloma axillare cv. Java (perennial horse gram) submitted to different water potentials and to determine the physiological quality of three seed lots of this cultivar. The physical purity, 1000 seeds weight, standard germination test (SGT) and speed of germination index (SGI) were evaluated. The following vigour tests were performed: first count of SGT; electrical conductivity and accelerated aging. The effect of substratum water availability was studied using polyethylene glicol solutions (PEG 6000) on seed germination and soil with three levels of water contents (60, 45 and 35% of field capacity) on germination and early growth of seedlings. Differences on initial physiological potential of scarified seeds could be observed by the germination test. First count of germination and SGI were not sensible to detect differences in seed physiological potential of these three lots. The accelerated aging of scarified seeds can be performed at 41ºC during at least 72 hours or at 45ºC for 48 hours. The electrical conductivity test was adequate to differentiate lots of scarified seeds after 48 hours of imbibition. The seed lot number three was classified as the lowest vigour lot of perennial horse gram seeds. There was progressive and significant decrease of germination percentage and of SGI when the substratum water potential decreased from zero to -0,6 MPa and reduction of germination percentage and SGI when the soil water availability decreased from 60% to 45 and 35% of field capacity. All seedlings shoot characters were hastened by the decrease of soil water availability, mainly the parameters: seedling height, fresh mass and area of leaves... (Complete abstract, click electronic access below)<br>Orientador: Teresinha de Jesus Deléo Rodrigues<br>Coorientador: Antônio João Cancian<br>Banca: Paola Pedroso Vantini<br>Banca: Ana Regina Pimentel de Almeida<br>Banca: Izabel Cristina Leite<br>Banca: Maria Lidia Stipp Paterniani<br>Doutor
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Paiva, Auricleia Sarmento de [UNESP]. "Disponibilidade hídrica na germinação de sementes e no crescimento de plântulas da leguminosa forrageira Macrotyloma axillare (E. Mey) Verdc. cv. Java." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/105113.
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Made available in DSpace on 2014-06-11T19:33:36Z (GMT). No. of bitstreams: 0
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paiva_as_dr_jabo.pdf: 412706 bytes, checksum: a3044c478c4a39b6825b47ace1e1b633 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Objetivou-se avaliar características fisiológicas da leguminosa forrageira tropical, Macrotyloma axillare cv. Java (macrotiloma) submetida a diferentes potenciais hídricos e determinar a qualidade fisiológica de três lotes de sementes dessa cultivar. Determinou-se a pureza física dos lotes, o peso de mil sementes, o teste padrão de germinação (TPG) e o índice de velocidade de germinação (IVG). Os seguintes testes de vigor foram realizados: primeira contagem do TPG, condutividade elétrica e envelhecimento acelerado. Avaliou-se o efeito da disponibilidade hídrica do substrato sobre a germinação de sementes com o uso de soluções de Polietileno Glicol (PEG 6000) e a germinação e o crescimento inicial das plântulas sob diferentes disponibilidades hídricas no solo (60, 45 e 35% da capacidade de campo). Diferenças no potencial fisiológico inicial de sementes escarificadas puderam ser observadas pelo teste de germinação. Os testes de primeira contagem e IVG não foram sensíveis para detectar diferenças no potencial fisiológico das sementes dos três lotes estudados. O envelhecimento acelerado das sementes escarificadas pode ser realizado a 41º C por um período mínimo de 72 horas ou a 45º C durante 48 horas. O teste de condutividade elétrica mostrou-se adequado para diferenciar os lotes de sementes escarificadas, a partir de 48 horas de embebição. O lote 3 foi classificado como o lote de menor vigor. Houve redução progressiva e significativa da porcentagem de germinação e do IVG quando o potencial hídrico do substrato decresceu de 0,0 até -0,6 MPa e decréscimo na germinação e no IVG quando a disponibilidade hídrica no solo decresceu de 60% para 45 e 35% da capacidade de campo. Todas as características da parte aérea das plântulas foram prejudicadas pela redução da disponibilidade hídrica do solo, notadamente, os parâmetros altura de plântula,...<br>The objective of this research was to evaluate physiological characteres of the tropical forage legume, Macrotyloma axillare cv. Java (perennial horse gram) submitted to different water potentials and to determine the physiological quality of three seed lots of this cultivar. The physical purity, 1000 seeds weight, standard germination test (SGT) and speed of germination index (SGI) were evaluated. The following vigour tests were performed: first count of SGT; electrical conductivity and accelerated aging. The effect of substratum water availability was studied using polyethylene glicol solutions (PEG 6000) on seed germination and soil with three levels of water contents (60, 45 and 35% of field capacity) on germination and early growth of seedlings. Differences on initial physiological potential of scarified seeds could be observed by the germination test. First count of germination and SGI were not sensible to detect differences in seed physiological potential of these three lots. The accelerated aging of scarified seeds can be performed at 41ºC during at least 72 hours or at 45ºC for 48 hours. The electrical conductivity test was adequate to differentiate lots of scarified seeds after 48 hours of imbibition. The seed lot number three was classified as the lowest vigour lot of perennial horse gram seeds. There was progressive and significant decrease of germination percentage and of SGI when the substratum water potential decreased from zero to -0,6 MPa and reduction of germination percentage and SGI when the soil water availability decreased from 60% to 45 and 35% of field capacity. All seedlings shoot characters were hastened by the decrease of soil water availability, mainly the parameters: seedling height, fresh mass and area of leaves... (Complete abstract, click electronic access below)
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Sarkar, Sunita. "Relationship between gibberellins, height and stress tolerance in barley (Hordeum vulgare L.) seedlings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ56695.pdf.
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Johansson, Anders. "Olika markberedningsmetoders effekt på granplantors (Picea abies) överlevnad och höjdtillväxt vid Siljansfors försökspark." Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-70923.
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Markberedning är vanligt förekommande när återbeskogning skall ske efter en avverkning. Vilken metod som väljs styrs av olika faktorer som t ex markfuktighet, humuslagrets tjocklek och mineraljordlagrets djup. I detta arbete studeras ett försök vid SLU: s försökspark i Siljansfors, ca 20 km SV om Mora. Studien omfattar två olika försöksytor, Sf 284 och Sf 287, planterade med gran (Picea abies) år 2004 respektive 2007. Ståndorten är en moränmark, markfuktighetsklassen är frisk och vegetationstypen är blåbär- och lingontyp och är belägen cirka 210 m.ö.h. Syftet med denna studie är att utvärdera och jämföra tre olika markberedningsmetoder med avseende på överlevnad och höjdtillväxt hos granplantor (Picea abies) under de första åren efter plantering. Vid plantering utan markberedning och utan kemiskt behandlade plantor är risken för en hög avgång på grund av skador orsakade av snytbagge (Hylobius abietis L.) stor de första åren. De markberedningsmetoder som jämfördes var högläggning, fläckmarkberedning och inversmetoden. Dessa tre metoder jämfördes inbördes samt mot att inte markbereda alls. I det totala samlade plantmaterialet var hälften kemiskt behandlat mot snytbagge. Fördelningen kemiskt behandlat och obehandlat plantmaterial var jämt fördelat i alla försök och upprepningar. I studien ingick också en utvärdering av den så kallade ”kanteffekten”, dvs. effekten av att plantorna sattes närmare än, respektive längre än 10 cm från kanten av den anlagda markberedningsytan. I juli 2009 mättes planthöjd och överlevnad på försöksytorna. Resultatet presenteras som medelvärden i form av stapeldiagram. Överlevnadsgraden höjdes med hjälp av markberedning, permetrinbehandling och val av planteringspunkt i förhållande till humuskant. Det var framför allt högläggning och inversmarkberedning som gynnade plantornas höjdtillväxt.<br>Soil preparation is common when reforestation occurs after harvesting. Which method is chosen is governed by various factors such as soil moisture, humus layer thickness and depth of mineral soil. An experiment was made at SLU's experimental park in Siljansfors, about 20 km SW about Mora. The study comprises two different experimental areas, Sf 284 and Sf 287, where Picea abies was planted in 2004 and 2007 respectively. The soil is a moraine, the soil moisture class is fresh and the vegetation type is blueberry and lingonberry type. The site is located approximately 210 m above sea level. The purpose of this study was to evaluate and compare three different soil preparation methods regarding to survival and height growth of Picea abies during the first years after planting. In the case of planting without soil preparation and without chemically treated plants, the risk of a high mortality due to the damage caused by pine weevil (Hylobius abietis L.) is high during the first years. The soil preparation methods that were compared were mounding, patch scarification and the inverse method. These three methods were compared to each other as well as to no soil preparation at all. In the total aggregate plant material, half were chemically treated against pine weevil. The distribution of chemically treated and untreated plant material was evenly distributed throughout all trials and repeats. The study also included an evaluation of the so-called "edge effect", i.e. the effect of placing the plants closer than, respectively, longer than 10 cm from the edge of the scarified patch. In July 2009, plant height and survival were measured in the experimental areas. The result is presented as averages in the form of bar charts. The survival rate was increased by soil preparation, permetrin treatment and selection of planting point relative to humus edge. It was above all mounding and inverse soil preparation that favored the height of the plants.
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Jelena, Mrđa. "Uticaj kvaliteta semena na dinamiku razvoja, prinosi kvalitet suncokreta." Phd thesis, Univerzitet u Novom Sadu, Poljoprivredni fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=96075&source=NDLTD&language=en.
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IzvodIZPet hibrida suncokreta (Sremac, Oliva, Cepko, NS-H-111 i Sumo 2 OR) gajena su tokomvegetacionih sezona 2010. i 2011. godine na oglednom polju Instituta za ratarstvo ipovrtarstvo, Novi Sad, na Rimskim šančevima i na oglednom polju Poljoprivredne stručneslužbe Zrenjanin. Laboratorijski deo ogleda izveden je u Laboratoriji za ispitivanje semenaInstituta za ratarstvo i povrtarstvo iz Novog Sada i Biohemijskoj laboratorijiPoljoprivrednog fakulteta u Novom Sadu. Cilj istraživanja je bio da se utvrdi da li semenskimaterijal, poreklom sa istog lokaliteta i iste parcele, u procesu dorade semena tj. odvajanjasemena po frakcijama menja kvalitet, kao i da li ovakav način dorade semenskog materijalautiče na prinos i komponente prinosa semena, kao i na sadržaj i prinos ulja odabranihhibrida suncokreta. Takođe, cilj je bio i da se utvrdi da li nedostatak primarnog korena kodponika suncokreta dovodi do statistički značajnog smanjenja prinosa semena i ulja, kao ikakav uticaj ima na komponente prinosa suncokreta. Analizirane su sledeće osobine:klijavost i vigor semena, enzimska aktivnost, nicanje u polju, nakupljanje suve materije (pobiljnim organima i ukupno po biljci), visina stabla, prečnik glave, prinos semena, masa 1000semena, sadržaj ulja i prinos ulja. Statistička obrada podataka izvršena je primenom analizevarijanse trofaktorijalnog ogleda, prema modelu podeljenih parcela. Iz tabele analizevarijanse je prikazana verovatnoća značajnosti razlika po F-testu, a na osnovu učešća usumi kvadrata tretmana određen je procentualni udeo svakog faktora u ukupnojvarijabilnosti. Takođe su izračunate i LSD vrednosti za poređenje razlika između tretmanaposmatranog faktora, na pragovima značajnosti od 1 i 5%. Utvrđena je i korelacionazavisnost posmatranih osobina. Rezultati analize varijanse pokazali su visoko značajnoučešće glavnih faktora (godine, lokaliteta, frakcije semena, tipa ponika), kao i njihovihmeđusobnih interakcija za većinu ispitivanih osobina. Na vrednosti ispitivanih osobinanajveći uticaj imala je godina istraživanja, a zatim lokalitet. Frakcija semena je imala visokoznačajan uticaj na klijavost semena, nicanje u polju, nakupljanje suve materije, prinossemena i prinos ulja. Tip ponika je imao visoko značajan uticaj na enzimsku aktivnost<br>Five sunflower hybrids (Sremac, Oliva, Cepko, NS-H-111, and Sumo 2 OR) were grown in2010 and 2011, on experimental fields of the Institute of Field and Vegetable Crops NoviSad - Rimski Šančevi, and experimental fields of the Agricultural Service Zrenjanin.Laboratory tests were conducted at Laboratory for Seed Testing of the Institute of Fieldand Vegetable Crops Novi Sad, and Biochemical Laboratory of the Faculty of Agriculture,University of Novi Sad. The aim of this research was to determine whether seed materialfrom the same locality and the same field lot changes quality during seed processing, i.e.dividing seed lot into fractions, and additionally whether this type of seed processingaffects seed yield, seed yield components, oil yield, and oil content of the selectedsunflower hybrids. The aim was also to determine if missing primary root in sunflowerseedlings results in statistically significant decrease of seed and oil yield, and establish howit influences sunflower yield components. The following traits were examined: seedgermination and vigour, enzymatic activity, field emergence, dry matter accumulation (inplant organs and in the whole plant), stem height, head diameter, seed yield, 1000 seedmass, oil content and oil yield. Statistical analysis of data was performed by analysis ofvariance of the trifactorial trial using the split-plot design model. Table of analysis ofvariance shows the probability of significance of differences by F-test, and based on theparticipation in the treatment sum of squares, percentage ratio of each factor wascalculated in the total variability. LSD values at 1 and 5% were computed to comparedifferences between treatments of the observed factor. Correlation dependence betweenthe observed traits was determined. Results of the analysis of variance showed a highlysignificant participation of the main factors (year, locality, seed fraction, type of seedling),and their mutual interactions for the majority of the examined traits. Year and locality hadthe highest effect on the value of the examined traits. Seed fraction had highly significanteffect on seed germination, emergence, dry matter accumulation, seed yield, and oil yield.Type of seedling had a highly significant effect on the enzymatic activity, seed yield, oilcontent, and oil yield.
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Wang, Yue-Chang, and 王裕昌. "Height Control and Subsequent Growth of Plug Grown Seedlings of Impatiens wallerana and Melampodium paludosum by Soaking Seed with Plant Growth Regulator ,and Preliminary Selection of Thermo-tolerant Petunia Hybrids." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/73366611031256528166.
Full textBooks on the topic "Seedling height"
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Dochinger, Leon S. Effect of acid mist and air pollutants on yellow-poplar seedling height and leaf growth. U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1985.
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Dochinger, Leon S. Effect of acid mist and air pollutants on yellow-poplar seedling height and leaf growth. U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1985.
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Minore, Don. A method for estimating the preharvest potential for seedling height growth on cutover forest land in southwestern Oregon. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986.
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Minore, Don. A method for estimating the preharvest potential for seedling height growth on cutover forest land in southwestern Oregon. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986.
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Lopushinsky, W. Effect of jellyrolling and acclimatization on survival and height growth of conifer seedlings. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986.
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Lopushinsky, W. Effect of jellyrolling and acclimatization on survival and height growth of conifer seedlings. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986.
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D, Zabowski, Anderson T. D, and Pacific Northwest Research Station (Portland, Or.), eds. Early survival and height growth of Douglas-fir and lodgepole pine seedlings and variations in site factors following treatment of logging residues. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1992.
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Aldous, David E., and Ian H. Chivers. Sports Turf and Amenity Grasses. CSIRO Publishing, 2002. http://dx.doi.org/10.1071/9780643090019.
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Sports Turf and Amenity Grasses is a comprehensive reference for anyone involved with the selection and maintenance of grasses used in sports and amenity areas in all areas. It provides a means to identify these grasses through keys, descriptions and photographs, and also provides detailed information on sowing, oversowing, stolonising and mowing heights. 
 The performance of each grass is assessed and detailed comments made on positive and negative aspects of its use. A grass’s tolerance to high temperature, frost, drought, shade, wet soil, salinity, low soil fertility, wear and close mowing is given in a table with each aspect rated. Further comments are made on how well it combines with particular grasses and on issues such as seedling vigour and sowing times.
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Lopushinsky, W. Early survival and height growth of Douglas-fir and lodgepole pine seedlings and variations in site factors following treatment of logging residues. 1992.
Find full textBook chapters on the topic "Seedling height"
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Gatica-Arias, Andrés, and César Vargas-Segura. "Chemical Mutagenesis of Coffee Seeds (Coffea arabica L. var. Catuaí) Using NaN3." In Mutation Breeding in Coffee with Special Reference to Leaf Rust. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-67273-0_13.
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AbstractCoffee (Coffea arabica L.) is one of the most important crops in the world and one of the main export products in several developing countries. Coffee is a perennial crop threatened by multiple, serious diseases and pests. Induced mutagenesis of seeds is widely used for increasing the genetic diversity and improvement of annual seed crops and could equally be applied to Arabica coffee breeding and genetic studies. Here we describe protocols to induce genetic variability in Arabica coffee seeds through mutagenesis using sodium azide (NaN3). Methods for NaN3 chemical toxicity testing and bulk irradiation are described. Briefly, the coffee seeds were immersed for 4, 8 and 12 hours in a NaN3 solution at different concentrations (0, 25, 50, 75, and 100mM). Two controls were used: one with distilled water and the other with the phosphate buffer (KH2PO4). Effects of the chemical mutagen on seed germination, seedling height, and root length were evaluated. As the concentration of applied NaN3 increased, the germination, seedling height, and root length decreased. Eight hours exposure was determined as an adequate immersion time. The LD50 values for NaN3 were between 50–75 mM. Our results indicate that NaN3 is an effective mutagen for Arabica coffee seeds and can be applied to coffee breeding and to study gene function in coffee.
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Lantican, Gaudencia A. "Field Screening of Gamma-Irradiated Cavendish Bananas." In Efficient Screening Techniques to Identify Mutants with TR4 Resistance in Banana. Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64915-2_7.
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AbstractIn our search for Cavendish bananas to withstand Fusarium oxysporum f. sp. cubense (Foc TR4) and other diseases, field screening of tissue-cultured Grand Nain banana seedlings derived from gamma-irradiated shoot tips was explored. Six months after irradiation and multiplication in the laboratory, the plantlets (M1V6) were individually grown in seedling bags under screen house conditions for 8 weeks, side-by-side with non-irradiated plantlets of the same clone. Once acclimatized, the banana plants were grown in an area confirmed positive of Foc TR4 (based on previous farm records stating that more than 50% of the plant population succumbed to the disease). Seedlings from each treatment (dose of radiation) were divided into four replicates, regardless of the number of plants. Each plant was given a unique identification code for traceability during disease monitoring, bunch and fruit quality evaluation.Incidences of Foc TR4, Moko disease (Ralstonia solanacearum) and virus diseases were monitored weekly. Plants found positive of any disease were eradicated immediately. The plant population for the succeeding generation was managed by removing the unwanted suckers, 12 weeks from planting using a spade gouge and keeping only one sucker per plant for the next generation. Agronomic characters of each plant were taken at the flowering stage. These included age to flower, height, pseudostem circumference, number of leaves and height of the sucker. The bunch was harvested 12 weeks from flowering. The number of hands in a bunch, the number of fingers and weight of a hand were recorded. The same agronomic characters of the plant were taken for the succeeding generations.Plants left standing in the field without any disease symptoms 3 years after planting were considered as putative mutants and were selected as candidate lines for multiplication and second-generation field screening. Only healthy suckers (free from viruses) were further multiplied via tissue culture technique to reach M1V6. Clean suckers from each line free of soil debris or dirt were sent to the laboratory for multiplication. At least 1000 plantlets were produced from each line for the second-generation field screening. These were grown in two locations – with and without records of Foc TR4. Field monitoring activities including plant population management, disease incidence assessment and fruit quality evaluation were carried out following the same protocols used in the establishment of the first-generation plants. Lines with population showing ≤10% Foc TR4 after the first harvest, with good vigor, fruit quality and productivity were considered as candidates for further multiplication, farmers distribution and field planting under semi-commercial scale.
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Céspedes, Reina, Noel Arrieta, Miguel Barquero, Ana Abdelnour, Nielen Stephan, and Ingelbretch Ivan. "Determination of radiosensitivity of Coffea arabica var. 'Venecia' seeds to gamma-ray irradiation." In Mutation breeding, genetic diversity and crop adaptation to climate change. CABI, 2021. http://dx.doi.org/10.1079/9781789249095.0033.
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Abstract Coffee is one of the most commercially available raw materials, being the tropical product with the highest market value in the world. In Costa Rica it is the third most important product for agricultural exports and provides the main income for many families in the country. However, coffee is under threat due to coffee leaf rust disease (CLR). Mutation breeding in coffee is a promising approach to develop new varieties resistant to CLR. As a new technology for coffee, basic tests related to mutation induction need to be done. The plant material used was Coffea arabica var. 'Venecia' seeds, with a moisture content of 27.3%. The applied irradiation doses were 0, 80, 100, 120, 140, 160 and 180 Gy. For each treatment, three replicates of 200 g were used, with a seed number range of 765-808 units per replicate. The irradiated seeds were planted on the same day. Eighty days after treatment the number of seedlings was quantified, the hypocotyl height and radicle length were measured and the opening of cotyledons was determined for each dose. The effects of the radiation doses on seed germination frequency were recorded. At the dose of 80 Gy, germination was reduced over the control by 9.65%, at 100 Gy by 34.06%, at 120 Gy by 52.76%, at 140 Gy by 60.24%, at 160 Gy by 65.56% and at 180 Gy by 75.40%. Seedling growth was affected and a delay in opening of the cotyledons was observed at higher doses. This radiosensitivity test, based on seed germination as compared with unirradiated control, revealed that the LD<sub>50</sub> for the variety tested is in the range 100-120 Gy experimentally, and according to the regression is 125 ± 30 Gy. This dose will be used for further bulk experiments and is of great importance, because the LD<sub>50</sub> is considered as the range where the appearance of useful mutations in breeding programmes is favoured. The establishment of these parameters is a necessary advance to continue with measurements of genetic and phenotypical parameters to implement mutation breeding in coffee looking for new sources of resistance against CLR.
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Gomez-Pando, Luz, Jesus Bernardo-Rojas, Denisse Deza-Montoya, Martha Ibañez-Tremolada, and Enrique Aguilar-Castellanos. "Mutation induction to improve quinoa (Chenopodium quinoa) resistance to downy mildew (Peronospora variabilis)." In Mutation breeding, genetic diversity and crop adaptation to climate change. CABI, 2021. http://dx.doi.org/10.1079/9781789249095.0019.
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Abstract Quinoa is an important crop due to its nutritional characteristics (better than cereals) and its tolerance to abiotic stresses. However, various factors such as high susceptibility to diseases, especially downy mildew caused by Peronospora variabilis, limit its agricultural performance. Genetic improvement of quinoa could reduce the need to use fungicides for this crop and maintain the organic quality of Peruvian production in small-scale farms. Seeds of var. 'Amarilla Marangani', irradiated with 150 and 250 Gy of gamma-rays (<sup>60</sup>Co), were evaluated in two experimental locations in Peru: coastland at La Molina and highland at Huancayo. Resistance to downy mildew and other agricultural traits in the M<sub>3</sub> and M<sub>4</sub> generations was studied. In both locations, downy mildew was observed in susceptible plants under natural infection, from the seedling stage to plant maturity. At the coastland site, six mutants with 30% leaf infection were obtained in the progeny of plants exposed to 150 Gy. Five additional mutants with 40% leaf infection were found in the progeny of plants exposed to 250 Gy. In the highland trial, only seven lines were identified with 30% severity (foliar area with symptoms) among the plants from the 150 Gy experiment. The parent materials showed 70-80% disease severity. Mutant lines with quantitative resistance and tolerance to downy mildew, high yield potential, reduced duration, shorter plant height, altered inflorescence shape and grain colour mutations were selected from both doses. This study showed that quantitative resistance and tolerance to downy mildew could be obtained in quinoa and this resulted in increased grain yields.
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Chen, Yaoyao, Zijun Yang, Wenjing Bian, Seiichi Serikawa, and Lifeng Zhang. "Extraction Study of Leaf Area and Plant Height of Radish Seedlings Based on SAM." In Studies in Computational Intelligence. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-53274-0_6.
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Stiti, Boutheina, Issam Touhami, Awatef Slama, et al. "Tunisia: Genetic Diversity Assessment of Cork Oak Provenance Trials in the Context of Climate Change." In Ecological Connectivity of Forest Ecosystems. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-82206-3_36.
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Abstract The cork oak (Quercus suber L.) is a native species in Tunisian forests; it plays a key role from an ecological and socio-economic point of view. As a result of serious biotic and abiotic problems, its ecosystem has significantly deteriorated, and its natural regeneration is random and nearly absent. Considering this situation, foresters have been assisting regeneration by creating new plantations. Within the framework of the EUFORGEN network, a project collected seedlings of Q. suber from various origins in northern Tunisia in 1997. The aim was to identify the best-adapted material to ensure the success and sustainability of plantations. Samples of 26 populations of cork oak from the natural distribution range of the species were established in five sites with differing soil and climatic conditions. This study evaluates the behavior of these different provenances in the experimental Tunisian site in terms of survival and height growth after 7 and 14 years, respectively. The cluster analysis (UPGMA) showed two groups: one from Morocco, Spain, and Portugal and the other from Italy, Algeria, and Tunisia. Overall, the Tunisian (Fernana) and Italian (Puglia) provenances prove successful and well adapted to the edapho-climatic conditions specific to the Tunisian trial site and resistant to biotic attacks.
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Comita, Liza, Ryan P. Dougherty, Salomon Aguilar, and Rolando Pérez. "Long-Term Census of Seedlings and Small Saplings in the Barro Colorado Island 50-ha Forest Dynamics Plot, Panama." In The First 100 Years of Research on Barro Colorado: Plant and Ecosystem Science. Smithsonian Institution Scholarly Press, 2024. https://doi.org/10.5479/si.26880712.
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Dynamics at early life stages play a critical role in shaping the composition and diversity of tropical tree communities. To better understand spatial and temporal patterns of recruitment, growth, and survival at early life stages, we established a long-term census of woody seedlings and small saplings in the Barro Colorado Island 50-ha Forest Dynamics Plot. Individuals ≥20 cm tall and <1cm diameter at breast height (dbh) were censused in 18,434 1-m 2 seedling plots every one to two years between 2001 and 2018, resulting in a dataset of 1,002,400 observations of 185,693 individuals of more than 400 tree, shrub, and liana species. Here, we present patterns of seedling density and diversity from this long-term census and review the main findings of published studies that have used this dataset.<p></p>
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Gianluppi, Daniel, Oscar José Smiderle, Aline das Graças Souza, and Sonicley da Silva Maia. "Practices for no-tillage in an improved cerrado area: Emergence, survival and initial growth of forest species." In UNITING KNOWLEDGE INTEGRATED SCIENTIFIC RESEARCH FOR GLOBAL DEVELOPMENT. Seven Editora, 2023. http://dx.doi.org/10.56238/uniknowindevolp-020.
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Considering that research on survival and growth of forest species via no-tillage in the improved cerrado of Roraima is still scarce, this research adds information to this technique with six forest species regarding emergence, survival and increase in height and diameter of plants over 18 months. In view of the above, the objective was to indicate procedures for direct sowing of tree forest species (pau-rainha, maçaranduba, freijó, jatobá, itaúba and African mahogany) in a cerrado area of Roraima, with the use of shrubby legumes, as a way to dispense with the formation and management of seedlings in nursery and allow the establishment of forest plantations with reduced costs. Thus, in the experimental area each species, maçaranduba, freijó, jatobá, itaúba, pau-rainha and African mahogany in July 2021 were sown every 50 cm apart, in the row and distributed two seeds at a depth of up to 1 cm according to the size of the seed. The experiment occupied a total area of 4,500 m2 and a useful area with seeds sown of 3,456 m2, totaling 648 seeds per species. The percentage of emergence was evaluated at 120 days after sowing, and seedling survival after 6, 12 and 18 months. In addition, the increments in height and diameter were evaluated from 6 to 12 months and from 12 to 18 months. Of the six forest species studied, 2% (pau-rainha), 6% (African mahogany) and 53% (jatobá) of seedling emergence presented with 2% (pau-reira), with survival >80% after 18 months. In the same period, African mahogany and queen's wood had a survival rate of 50%. Direct sowing in the improved cerrado from Roraima to Jatobá is recommended. The procedure used to promote the increase in stem diameter (ΔDC) of jatobá plants from no-tillage via seeds from six to 18 months is the application of 3.0 t ha-1 of limestone and 1.8 t ha-1 of agricultural gypsum in the cerrado of Roraima, being an appropriate species for the establishment of forest plantations with costs of 1.55 reais per seedling.
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Muhammad Ishiaku, Yunusa, Usman Abdullahi, Haruna Ibrahim, Safiyanu Abdullahi Ahmed, and Muhammad Rabiu Hassan. "Improvement of Leucaena (Leucaena leucocephala) Benth. Seeds Emergence Using Hot Saline Water Treatment Durations." In Desalination - Ecological Consequences [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.110667.
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Leucaena leucocephala is a leguminous shrub that has the potential for increasing animal production with diverse environmental and ecological significance. An experiment was conducted to investigate the effect of hot saline water treatment durations on the emergence of Leucaena seeds. The experiment was arranged in a completely randomized design with six treatments and three replicates. The treatments are control, soaking of seeds in hot saline water (20 g NaCl/1 L of distilled water) at 80°C for 1, 2, 3, 4 and 5-min durations. The percentage emergence, emergence index, plant height and leave numbers were measured. Hot saline water treatment durations had positive effect of breaking Leucaena seed dormancy and enhance germination. The highest percentage emergence and emergence index (53.9% and 7.95) were obtained at 2 min treatment durations but plant height and number of leaves were highest (6.29 cm and 7.00 cm) respectively in 4 min of treatment durations. It could be concluded that percentage emergence and seedling growth of Leucaena can be enhanced using 2 min hot saline water treatment duration. It is recommended that saline soils that have being degraded due to oil spillage to enable production of Leuceana as animal feed and control environmental degradation.
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Augspurger, Carol. "Seed Dispersal by Wind." In The First 100 Years of Research on Barro Colorado: Plant and Ecosystem Science. Smithsonian Institution Scholarly Press, 2024. https://doi.org/10.5479/si.26880697.
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<p dir="ltr">Studies of seed dispersal by wind on Barro Colorado Island (BCI) span 40 years. This historic review first explores “determinants” of dispersal potential, including wind conditions, diaspore (dispersal unit) traits (mass, area, aerodynamic category), and parent traits (tree height, crop size, deciduousness). Second, “patterns” of seed distributions that test predictions made in the “determinants” section are examined. “Patterns” are quantified first simply by measuring rate of descent of diaspores in still air; then by controlled experiments releasing diaspores from a tower on BCI; and, finally, by field quantifications, including measures of seed shadows, use of genetic markers to verify seed parentage, and development of inverse modeling of seeds in seed traps in mapped plots. The most recent approaches use mechanistic models to predict seed distributions arising from atmospheric complexities. Finally, the review turns to “consequences” of dispersal for subsequent life stages, including interactions with natural enemies and seedling regeneration.</p><p><br></p>
Conference papers on the topic "Seedling height"
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DUMINS, Karlis, Toms STALS, and Dagnija LAZDINA. "FOREST REGENERATION QUALITY ASSESSMENT BY ASTA SYSTEM." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.178.
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In Latvia one third of the total forest area is regenerated by planting tree seedlings and therefore it is important to choose the appropriate soil preparation method and the right type of regeneration material for each forest type. Usually the success of afforestation is evaluated by how high is the average seedling survival rate and growth parameters like height, annual increment, diameter at breast height while the location of the seedling is disregarded. This may be of great importance since in such stands the environmental conditions typically are not entirely homogenous. Micro topography differences impact seedling growth, because it modifies water regime, temperature, micronutrient availability, sun radiation and other factors. Therefore, aim of this work is to improve monitoring methods and determine the most efficient soil preparation and seedling preparation combination to improve the quality of forest regeneration. That could be done using ASTA documentation system originally developed to show seedling and mound location and density in planting area during mechanic planting. But it also allows to link the precise location of the seedling and growing conditions with its growing rate and survival and therefore it is easier to exclude seedlings that are affected by other factors than those that you are interested in, so you can gain more representative results. This also could be used in forest management. When using ASTA system it is also possible to display how different tree disease are distributed in the stand, if they have spread eventually or localized only in some parts of the stand, also it can be used for browsing and other tree damage monitoring in the stand. In conclusion: in harsh environmental conditions on unprepared forest soil and soil prepared in furrows made by disc trench larger seedlings show better survival rate. Survival of seedlings is significantly impacted by micro topography, whereas mounded micro sites equalize local environmental conditions that reduce impact of micro topography.
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Zhang, Wenqiang, Wei Li, Zhenyu Yang, and Jianda Han. "Height information acquisition method of seedling with machine vision." In 2015 IEEE International Conference on CYBER Technology in Automation, Control, and Intelligent Systems (CYBER). IEEE, 2015. http://dx.doi.org/10.1109/cyber.2015.7288157.
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Wanasinghe, Thumeera R., Benjamin Robert Dowden, Oscar De Silva, George K. I. Mann, and Cyril Lundrigan. "Automated Seedling Height Assessment for Tree Nurseries Using Point Cloud Processing." In 2019 International Conference on Robotics and Automation (ICRA). IEEE, 2019. http://dx.doi.org/10.1109/icra.2019.8793790.
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"Greenhouse and field evaluation of native Trichoderma species for biocontrol on tomato in Florida." In Plant Health 2024. American Phytopathological Society, 2024. http://dx.doi.org/10.1094/aps-ph24-003.
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Developing environmentally friendly disease management strategies is essential for sustainable agriculture. Trichoderma spp. have been commercialized as plant growth enhancers and biocontrol agents. However, their performance in Florida agricultural soils has been limited, possibly due to the inability of introduced isolates to survive and compete in diverse soil environments. This study aimed to characterize and evaluate diverse Trichoderma spp. collected from Florida agricultural soils for biocontrol activity. In tomato greenhouse trials, isolates were evaluated for plant growth promotion and biocontrol against bacterial spot when applied as a root drench. Several isolates significantly enhanced seedling growth, root length, and biomass. Notably, GEV 3581 T. amazonicum statistically reduced bacterial spot severity by 66.6% compared to the control and a commercially formulated Trichoderma (P<0.05). Field trials assessed plant height, yield and biocontrol against fusarium wilt caused by Fusarium oxysporum f.sp. lycopersici. Although there was no significant effect on plant height and total yield, the commercial Trichoderma and native GEV 3550 T. longibrachiatum significantly reduced fusarium wilt severity by 30.37% and 26.26%, respectively, compared to the control (P<0.05). The results support the potential of native Trichoderma isolates to promote plant health, and as a source for discovering biocontrol agents adapted to Florida’s unique production environment.
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Miezite, Olga, Baiba Jansone, Dace Brizga, and Linards Sisenis. "PROTECTION OF PINUS SYLVESTRIS L. STANDS FROM CURCULIONIDAE DAMAGE." In 22nd International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022v/3.2/s14.47.
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One of the long-term goals of the certification systems (FSC (Forest Stewardship Council) and PEFC (Program for the Endorsement of Forest Certification)) of sustainably managed forests that provide both social, environmental, and economic benefits is to completely phase out the use of chemical pesticides to protect planting material. It is in the interest of both nurseries and forest owners to find successful alternative, environmentally friendly solutions to safeguard pine saplings against Curculionidae. The studied two-year-old pine stands are located in the Hylocomiosa forest type with a total area of 4.27 ha. In 2016 clear-cutting was carried out, and in the spring of 2018, containerized seedlings were planted in areas with partial soil scarification in three repetitions in each area. Six plots with three variants in each of the repetitions were prepared. The work aims to evaluate the effectiveness of the use of P.sylvestris protection against damage Curculionidae while comparing untreated (control) lots with the ones treated with the systemic insecticide Actara or wax based on the number of damages and growth of seedlings. The intensity of tree damage and the incidence of damage over two years, depending on the type of seedling treatment, was assessed, and the average tree heights were measured and compared. With an increase in the incidence of weevil damage, the intensity of damage is also observed. At the same time, a significant (p>0.05) difference in lesions between the types of treatment of seedlings has not been established. Within two years, the death of trees due to weevil damage is insignificant - 2 % of all seedlings treated with the systemic insecticide Actara, 5 % of seedlings treated with wax Kvaae, and 6 % of untreated seedlings or control. The treatment of seedlings significantly affected their growth in the first and second years after planting (p less than 0.05). The use of wax Kvaae resulted in higher costs and similar protection effectiveness as the use of chemical means.
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Certan, Corina, and Constantin Bulimaga. "Dinamica indicilor dendrometrici a speciilor lemnoase de salcâm, ulm și frasin din cariera de calcar „Lafarge Ciment” din Rezina." In Provocări şi tendinţe actuale în cercetarea componentelor naturale şi socio-economice ale ecosistemelor urbane şi rurale. Institute of Ecology and Geography, Republic of Moldova, 2020. http://dx.doi.org/10.53380/9789975891608.15.
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Dynamics of growths in the height and after the diameter of the seedlings, of acacia, elm and ash, had investigated on the freshly formed sterile dump limestone quarry „Lafarge Ciment”. In the first year after planting, the young seedlings, had an increase in height and in diameter slow and uneven. In the years that followed, the seedlings became more viable and less influenced by local and temporal fluctuations of environmental factors. The offspring of the woody species had a sufficiently high (78.8-99.5%).
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KEMESIUS, Martynas, Gerda SILINGIENE, Regina VASINAUSKIENE, and Remigijus ZALKAUSKAS. "THE INFLUENCE OF SEWAGE SLUDGE ON NORWAY SPRUCE (PICEA ABIES (L.) H. KARST.) SEEDLINGS GROWTH." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.079.
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The usage of biodegradable waste as sewage sludge in a proper way for tree nurseries enable to seek for ecological, waste-less, alternative to mineral fertilization farming ways. The aim of this research is to investigate impact of sewage sludge fertilizers on Norway spruce (Picea abies) two years’ seedlings growth. Research has been done in 2013-2014 at Utena State Forest Enterprise nursery. The different fertilization rates (20, 40, 60, 80, 100 t/ha) of sewage sludge were investigated and compared with control – traditional fertilization with mineral fertilizers. The impact of sewage sludge was evaluated by seedlings biometric indicators, also dry mass of sample seedlings (medium seedlings by height and diameter). The bigger rates of sewage sludge showed almost better results in exception of seeds outlet. Sewage sludge has long lasting effect on seedlings growth and could successfully shift soil fertilization by mineral fertilizers. The obtained research results confirm the similar research carried out in 2011 in Rokiskis State Forest Enterprise nursery for first year Norway Spruce seedlings.
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Černiauskas, Valentinas, and Iveta Varnagirytė-Kabašinskienė. "Evaluating early changes in young tree seedlings under simulated urban environment." In Research for Rural Development 2024 : annual 30th international scientific conference. Latvia University of Life Sciences and Technologies, 2024. https://doi.org/10.22616/rrd.30.2024.046.
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Urban trees, integral to urban environments, demonstrate intricate responses to atmospheric pollutants like particulate matter (PM), tropospheric ozone (O3), and carbon dioxide (CO2). Notably, O3 induces oxidative stress in leaf tissues, while PM, consisting of fine airborne particles, interacts with urban trees through foliar deposition. This interaction is particularly interesting as tree canopies are highly effective filters, capturing and accumulating PM on their surfaces. The present study focused on silver birch, small-leaved lime, and Norway maple seedlings responses to elevated O3 and CO2 with and without PM. Maple seedlings exhibited the highest stem height increment, followed by lime and birch. Elevated O3 and CO2 without PM led to substantial height increments for lime and maple. Elevated O3 and CO2 without PM increased the total polyphenols in lime and maple leaves but decreased the content of total flavonoids in birch and lime leaves. Our findings underscore the adaptability of lime and maple seedlings to elevated O3 and CO2, positioning them as promising species for urban environments in the face of changing climates. Birch, while exhibiting biochemical changes, demonstrated less pronounced growth responses. This studyʼs insights into the intricate interactions between urban trees and multiple pollutants, particularly the species-specific responses, are of significant value for urban planning and environmental management.
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MIEZĪTE, Olga, Jeļena RŪBA, Lāsma FREIMANE, Imants LIEPA, and Edgars DUBROVSKIS. "THE HEALTH STATUS AND NATURAL REGENERATION OF PINUS SYLVESTRIS L. AFTER THE SURFACE FIRE IN VACCINIOSA FOREST TYPE IN LATVIA." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.100.
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From abiotic factors the most effecting influence on forest ecosystems has fire. Two years after surface fire in the pine stands growing in Vacciniosa forest type. Two PL (hereinafter PL) were installed in medium-aged (49 years old, 2.3 ha) and two PLs - in maturing (96 years old, 2.5 ha) stands. In each PL (20x20 m), the numbering of the trees was carried out and their placement was fixed, as well as the diameter, height and height of the green crown were measured. The sanitary condition of each tree was evaluated. For registration of one-year and two-year seedlings in each sample plot 25 sampling units (1 m2) were used. The similar sampling units were used for evaluation of ground cover (5 in each PL diagonally arranged), the obtained samples were weighed. The purpose of the study was to analyze the health status and natural regeneration of P.sylvestris after the surface fire. The ground vegetation was completely burned out in the medium-aged stand, but in the maturing stand both ground vegetation and organic layer - mosaically. The average burning height of trees in the medium-aged forest stand was 0.6±0.64 m, in the maturing stand - at 2.3±0.34 m. The natural regeneration was not detected in the first year after surface fire in the medium-aged forest (only 58800 one-year seedlings were recorded at the second year after fire), while in the maturing stand it was at this time (46600 one-year and 14200 two-year seedlings). Insect damage and cracked bark was not detected.
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Nozdracheva, R., and R. Kostennikov. "PECULIARITIES OF CHERRY PROPAGATION ON CLONAL ROOTSTOCKS." In FORESTRY-BIOLOGICAL FOUNDATIONS OF SUSTAINABILITY OF NATURAL AND ARTIFICIAL PHYTOCOENOSES. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2024. http://dx.doi.org/10.58168/fbfsnap2024_242-248.
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Cherry is a fruit stone fruit crop, popular in many countries of the world and on the territory of the Russian Federation. Cherry fruits are valued for their dessert and delicate taste, high content of nutrients. It is consumed fresh and processed. Cherries are especially suitable for making compotes. Breeders have created many varieties of cherries for different soil and climatic conditions. Cherry varieties differ in color and ripening of fruits. The trees are tall, have a spreading and sparse crown, and require regular pruning. To create cherry varieties with small-sized crowns, it is necessary to select compact crowns and propagate cherry varieties on clonal rootstocks. Scientific studies on the propagation of cherries on vegetatively propagated rootstocks indicate a decrease in the growth activity of annual seedlings in the fruit nursery, and shortening of the central trunk of seedlings (tweezing) allows you to increase the formation of side shoots at a given height and form a crown in annual cherry seedlings. It has been established that the studied cherry varieties when grafted on clonal rootstocks VSL-1 and LC-52 provide good survival in the nursery, high yield of planting material, but the growth and development of seedlings depends on variety-rootstock combinations.
Reports on the topic "Seedling height"
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Dochinger, Leon S., Keith F. Jensen, and Keith F. Jensen. Effect of acid mist and air pollutants on yellow-poplar seedling height and leaf growth. U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1985. http://dx.doi.org/10.2737/ne-rp-572.
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Dochinger, Leon S., Keith F. Jensen, and Keith F. Jensen. Effect of acid mist and air pollutants on yellow-poplar seedling height and leaf growth. U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1985. http://dx.doi.org/10.2737/ne-rp-572.
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Boyle, Maxwell. Terrestrial vegetation monitoring at Canaveral National Seashore: 2022 data summary. National Park Service, 2024. http://dx.doi.org/10.36967/2303291.
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The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the NPS Inventory and Monitoring Program. The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and monitoring is conducted at 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks? natural vegetation. 2022 marked the first year of conducting this monitoring effort at Canaveral National Seashore (CANA). Fourteen vegetation plots were established throughout the park in April. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches {in}]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Canaveral National Seashore in 2022. Data were stratified across two dominant broadly defined habitats within the park, Coastal Plain Upland Open Woodlands and Maritime Upland Forests and Shrublands. Noteworthy findings include: 176 vascular plant taxa were observed across 14 vegetation plots, including seven species not previously documented within the park. The most frequently encountered species in each broadly defined habitat included: Coastal Plain Upland Open Woodlands: saw palmetto (Serenoa repens), dune greenbrier (Smilax auriculata), Elliott?s milkpea (Galactia elliottii), myrtle oak (Quercus myrtifolia), Chapman oak (Quercus chapmanii), and southern evergreen blueberry (Vaccinium myrsinites). Maritime Upland Forests and Shrublands: live oak (Quercus virginiana), muscadine (Muscadinia rotundifolia var. rotundifolia), saw palmetto, cabbage palmetto (Sabal palmetto), dune greenbrier, and Virginia creeper (Parthenocissus quinquefolia). Four non-native species categorized as invasive by the Florida Invasive Species Council (FISC 2019) were encountered within Maritime Upland Forest and Shrubland plots during this monitoring effort. These included Brazilian peppertree (Schinus terebinthifolia), cogongrass (Imperata cylindrica), common lantana (Lantana strigocamara), and caesarweed (Urena lobata). There were no invasive species observed in Coastal Plain Upland Open Woodland plots. Two species listed as Endangered by the state of Florida (FDACS 2021) were encountered on the park during this monitoring effort and included hand fern (Cheiroglossa palmata) and Atlantic Coast Florida lantana (Lantana depressa var. floridana). Hand fern was observed in 30%of Maritime Upland Forest and Shrubland plots, while lantana was observed in one (10%) of Maritime Upland Forest and Shrubland plots. An additional five vascular species categorized as Commercially Exploited by the state of Florida (FDACS 2021) were also observed in these vegetation plots. Slash pine (Pinus elliottii) or South Florida slash pine (Pinus densa) and sand live oak (Quercus geminata) were the most dominant species within the tree stratum of Coastal Plain Upland Open Woodlands within the park; cabbage palmetto and live oak were the most dominant species of Maritime Upland Forests and Shrublands, although 11 other species large enough to be measured as trees (i.e., more than 1.37 meters (4.5 ft) in height and greater than or equal to 10 centimeters (3.9 in) in diameter at breast height (DBH) were also present within these plots. Based on these baseline findings, the most immediate threat to vegetation resources within Upland Open Woodlands of Canaveral National Seashore is related to exclusion of fire and an altered natural fire regime. These factors have likely led to a reduction of canopy species (pines) across all woody stem strata?tree, sapling, seedling?and an increase in abundance of woody shrub species (e.g., saw palmetto). These characteristics (low canopy species density and high woody shrub abundance) were observed in monitoring plots of this habitat type. The most immediate threat to Maritime Upland Forest and Shrubland habitat within the park is from potential expansion of non-native, invasive plant species, like Brazilian peppertree and cogongrass. All plots are scheduled to be resampled during the summer of 2026.
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Davis, Molly. Plant community composition and structure monitoring at Scotts Bluff National Monument: 2022 data report. National Park Service, 2023. http://dx.doi.org/10.36967/2295542.
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This report presents the results of vegetation monitoring efforts in 2022 at Scotts Bluff National Monument (SCBL) by the Northern Great Plains Inventory and Monitoring Network (NGPN) and Fire Ecology Program (NGPFire). NGPN began vegetation monitoring at SCBL in 2011, and this was the twelfth year of combined monitoring efforts between NGPN and NGPFire at SCBL. NGPN did not visit SCBL in 2020 or 2021 due to travel restrictions during the COVID-19 pandemic. However, NGPFire was able to do vegetation monitoring at SCBL during these two years. Crew members from NGPN visited eight long-term monitoring plots to collect data on the plant communities at SCBL. This work is part of a long-term monitoring effort designed to provide a better understanding of the condition of the vegetation community and how it changes over time. NGPN staff measured species richness, herb-layer height, native and non-native species abundance, ground cover, and site disturbance at each of the plots. In plots where woody species were present, tree regeneration, tall shrub density, tree density, and woody fuel loads were also measured. The NGPFire crew visited an additional seven plots in the Eagle Rock and North Platte burn units to better understand the effects of prescribed fire on vegetation. The NGPFire crew measured herb-layer height, native and non-native species abundance, ground cover, and site disturbance at each of the plots. The NGPFire crew conducted one prescribed fire in 2022, in the Eagle Rock burn unit, on April 25, 2022. In 2022, the monitoring crews identified 73 unique plant species in 15 monitoring plots. Of those species, 12 were exotic species. Two species considered rare in Nebraska were observed in the plots, including spotted fritillary, Fritillaria atropurpurea. At every plot except for two, the absolute cover of native species was greater than the absolute cover of exotic species. Monitoring crews collected tree regeneration data in three plots and found one species of seedling (chokecherry) and one species of adult tree (Rocky Mountain juniper). Ground disturbances, observed in fourteen of the fifteen plots, included animal use, prescribed fire, erosion, and soil disturbance
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Boyle, Maxwell (Forbes), Mallorie Davis, Maxwell (Forbes) Boyle, and Mallorie Davis. Terrestrial vegetation monitoring at Moores Creek National Battlefield: 2022 data summary. National Park Service, 2024. http://dx.doi.org/10.36967/2306499.
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Parks within the Southeast Coast Network (SECN) host a diverse assemblage of plants and terrestrial vegetation communities. Vegetation communities are dynamic entities whose species composition, abundance, distribution, and structure are influenced by environmental factors and impacted over time by natural and anthropogenic disturbances. Determining trends in vegetation communities over time and identifying plant stressors is vital to understanding the ecological health of terrestrial ecosystems within SECN parks. Moores Creek National Battlefield lies within the Middle Atlantic Coastal Plain ecoregion of North Carolina. The distribution and composition of forested habitats within the park are largely determined by former land-use patterns (including clearing land for agriculture and timber removal), as well as by localized edaphic conditions. Stressors and threats to vegetation resources are present within the park, many of which are related to large-scale land-use changes of the 19th and 20th centuries and adjacent land use. The year 2022 marked the first year of this monitoring effort at Moores Creek National Battlefield. Eleven vegetation plots were established throughout the park in June. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass estimates. Data were stratified across three dominant broadly defined habitats within the park: Coastal Plain Alluvial Wetlands, Coastal Plain Nonalluvial Wetlands, and Coastal Plain Open Upland Woodlands. Two hundred twenty-nine vascular plant taxa were detected during this monitoring effort, including 30 taxa not detected in previous lists.
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Boyle, M., and M. Boyle. Terrestrial vegetation monitoring at Canaveral National Seashore: 2022 data summary?version 1.1. National Park Service, 2024. http://dx.doi.org/10.36967/2305810.
Full textAbstract:
Parks within the Southeast Coast Network (SECN) host a diverse assemblage of plants and terrestrial vegetation communities. Vegetation communities are dynamic entities whose species composition, abundance, distribution, and structure are influenced by environmental factors and impacted over time by natural and anthropogenic disturbances. Determining trends in vegetation communities over time and identifying plant stressors is vital to understanding the ecological health of terrestrial ecosystems within SECN parks. Canaveral National Seashore lies within the Southern Coastal Plain ecoregion of Florida. The distribution and composition of vegetation communities within the park are largely determined by former land-use patterns, climate influences, as well as by localized edaphic conditions. Stressors and threats to vegetation resources are present within the park, many of which are related to large-scale land-use changes of the 19th and 20th centuries and rapidly changing climate patterns and sea-level rise. Other threats to the vegetation resources of Canaveral National Seashore include fire exclusion, feral hogs, and competition from invasive non-native vegetation. 2022 marked the first year of conducting this monitoring effort at Canaveral National Seashore. Fourteen vegetation plots were established throughout the park in April. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass estimates. Plot locations were stratified across two land parcels of the park (Apollo Beach and Oak Hill) and across two dominant broadly defined habitats: Maritime Upland Forests and Shrublands and Coastal Plain Upland Open Woodlands. One hundred seventy-six vascular plant taxa were detected during this monitoring effort, including eight taxa not detected in previous lists.
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Boyle, Maxwell, Mallorie Davis, Maxwell Boyle, and Mallorie Davis. Terrestrial vegetation monitoring at Horseshoe Bend National Military Park: 2022 data summary. National Park Service, 2024. http://dx.doi.org/10.36967/2305166.
Full textAbstract:
Parks within the Southeast Coast Network (SECN) host a diverse assemblage of plants and terrestrial vegetation communities. Vegetation communities are dynamic entities whose species composition, abundance, distribution, and structure are influenced by environmental factors and impacted over time by natural and anthropogenic disturbances. Determining trends in vegetation communities over time and identifying plant stressors is vital to understanding the ecological health of terrestrial ecosystems within SECN parks. Horseshoe Bend National Military Park lies within the Southern Inner Piedmont ecoregion of Alabama. The distribution and composition of forested habitats within the park are largely determined by former land-use patterns (including clearing land for agriculture and timber removal), as well as by localized edaphic conditions. Stressors and threats to vegetation resources are present within the park, many of which are related to large-scale land-use changes of the 19th and 20th centuries, current impacts from upstream and downstream dams along the Tallapoosa River, and adjacent land use. Other threats to the vegetation resources of Horseshoe Bend National Military Park include over-population of white-tailed deer (Odocoileus virginianus), outbreaks of southern pine beetle (Dendroctonus frontalis), and competition from invasive non-native vegetation. 2022 marked the first year of conducting this monitoring effort at Horseshoe Bend National Military Park. Ten vegetation plots were established throughout the park in August. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass estimates. Data were stratified across two dominant broadly defined habitats within the park: Piedmont Alluvial Wetlands and Piedmont Upland Forests. One hundred ninety-nine vascular plant taxa were detected during this monitoring effort, including 54 taxa not detected in previous lists.
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Lopushinsky, W. Effect of jellyrolling and acclimatization on survival and height growth of conifer seedlings. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1986. http://dx.doi.org/10.2737/pnw-rn-438.
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Boyle, Maxwell, and Elizabeth Rico. Terrestrial vegetation monitoring at Fort Pulaski National Monument: 2019 data summary. National Park Service, 2021. http://dx.doi.org/10.36967/nrds-2288716.
Full textAbstract:
The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and monitoring is currently conducted at 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation. 2019 marks the first year of conducting this monitoring effort on four SECN parks, including Fort Pulaski National Monument (FOPU). Twelve vegetation plots were established at Fort Pulaski National Monument in August. Data collected in each plot included species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches {in}]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Fort Pulaski National Monument in 2019. Data were stratified across two dominant broadly defined habitats within the park (Maritime Tidal Wetlands and Maritime Upland Forests and Shrublands). Noteworthy findings include: Sixty-six vascular plant taxa were observed across 12 vegetation plots, including six taxa not previously known from the park. Plots were located on both Cockspur and McQueen’s Island. The most frequently encountered species in each broadly defined habitat included: Maritime Tidal Wetlands: smooth cordgrass (Spartina alterniflora), perennial saltmarsh aster(Symphyotrichum enuifolium), and groundsel tree (Baccharis halimifolia) Maritime Upland Forests and Shrublands: yaupon (Ilex vomitoria), southern/eastern red cedar (Juniperus silicicola + virginiana), and cabbage palmetto (Sabal palmetto). Four non-native species identified as invasive by the Georgia Exotic Pest Plant Council (GA-EPPC 2018) were found during this monitoring effort. These species (and their overall frequency of occurrence within all plots) included: Japanese honeysuckle (Lonicera japonica; 17%), bahiagrass (Paspalum notatum; 8%), Vasey’s grass (Paspalum urvillei; 8%), and European common reed (Phragmites australis; 8%). Two rare plants tracked by the Georgia Department of Natural Resources (GADNR 2013) were found during this monitoring effort. These include Florida wild privet (Forestiera segregata) and Bosc’s bluet (Oldenlandia boscii). Southern/eastern red cedar and cabbage palmetto were the most dominant species within the tree stratum of the maritime Upland Forest and Shrubland habitat type. Species that dominated the sapling and seedling strata of this type included yaupon, cabbage palmetto, groundsel tree, and Carolina laurel cherry (Prunus caroliniana). The health status of sugarberry (Celtis laevigata)—a typical canopy species in maritime forests of the South Atlantic Coastal Plain--observed on park plots appeared to be in decline, with most stems experiencing elevated levels of dieback and low vigor. Over the past decade, this species has been experiencing unexplained high rates of dieback and mortality throughout its range in the Southeastern United States; current research is focusing on what may be causing these alarming die-off patterns. Duff and litter made up the majority of downed woody biomass (fuel loads) across FOPU vegetation plots.
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Boyle, Maxwell, and Elizabeth Rico. Terrestrial vegetation monitoring at Timucuan Ecological and Historic Preserve: 2019 data summary—Version 2.0. National Park Service, 2022. http://dx.doi.org/10.36967/nrds-2290196.
Full textAbstract:
The Southeast Coast Network (SECN) conducts long-term terrestrial vegetation monitoring as part of the nationwide Inventory and Monitoring Program of the National Park Service (NPS). The vegetation community vital sign is one of the primary-tier resources identified by SECN park managers, and it is currently conducted on 15 network parks (DeVivo et al. 2008). Monitoring plants and their associated communities over time allows for targeted understanding of ecosystems within the SECN geography, which provides managers information about the degree of change within their parks’ natural vegetation. 2019 marks the first year of conducting this monitoring effort on four SECN parks, including Timucuan Ecological and Historic Preserve (TIMU). A total of 23 vegetation plots were established in the park in May and June. Data collected in each plot include species richness across multiple spatial scales, species-specific cover and constancy, species-specific woody stem seedling/sapling counts and adult tree (greater than 10 centimeters [3.9 inches (in)]) diameter at breast height (DBH), overall tree health, landform, soil, observed disturbance, and woody biomass (i.e., fuel load) estimates. This report summarizes the baseline (year 1) terrestrial vegetation data collected at Timucuan Ecological and Historic Preserve in 2019. Data were stratified across three dominant broadly defined habitats within the park (Coastal Plain Nonalluvial Wetlands, Coastal Plain Open Uplands and Woodlands, and Maritime Upland Forests and Shrublands) and three land parcels (Cedar Point, Theodore Roosevelt, and Thomas Creek). Noteworthy findings include: A total of 157 vascular plant taxa (species or lower) were observed across 23 vegetation plots, including nine species not previously known from the park. Three plots were located in the footprint of the Yellow Bluff Fire, and were sampled only two weeks following the fire event. Muscadine (Muscadinia rotundifolia), cat greenbrier (Smilax glauca), water oak (Quercus nigra), and swamp tupelo (Nyssa biflora) were the most frequently encountered species in Coastal Plain Nonalluvial Wetland habitat; saw palmetto (Serenoa repens), slash pine (Pinus elliottii), and gallberry (Ilex glabra) were the most frequently encountered species in Coastal Plain Open Upland and Woodland habitat; and Darlington oak (Quercus hemisphaerica), Spanish moss (Tillandsia usenoides), and red bay (Persea borbonia) were the most frequently encountered species in Maritime Upland Forests and Shrublands. There were no exotic species of the Florida Exotic Pest Plant Council list of invasive plants (FLEPPC 2020) observed on any of these plots. Both red bay and swamp bay (Persea palustris) were largely absent from the tree stratum in these plots; however, they were present (occasionally in high abundance) in the seedling and sapling strata across all habitat types. Buckthorn bully (Sideroxylon lycioides)—listed as Endangered in the state of Florida by the Florida Department of Agriculture and Consumer Services (FDACS 2020)—was observed in three Maritime Upland Forest and Shrubland plots. The tree strata in each broadly defined habitat were dominated by the following species: Coastal Plain Nonalluvial Wetlands-loblolly bay (Gordonia lasianthus) Coastal Plain Open Uplands and Woodlands-longleaf pine (Pinus palustris) Maritime Upland Forests and Shrublands-oaks (Quercus sp.) Most stems within the tree strata exhibited healthy vigor and only moderate dieback across all habitat types. However, there was a large amount of standing dead trees in plots within Maritime Upland Forests and Shrublands. Downed woody biomass (fuel loads) were highest in the Cedar Point and Thomas Creek land parcels.