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Academic literature on the topic 'Seedling performances'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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Journal articles on the topic "Seedling performances"

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Erniwati, Erniwati. "PENGARUH UKURAN BIJI TERHADAP KEMAMPUAN TANAMAN TUMBUH KEMBALI SETELAH RUSAK AKIBAT HERBIVORI." Jurnal Ilmu-Ilmu Pertanian Indonesia 9, no. 2 (2017): 156–64. http://dx.doi.org/10.31186/jipi.9.2.156-164.

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The objective of the study is to investigate the effect of seed size in the resprouting ability of seedling after being damaged and whether it correlates with the reserve effect. We grew the seedlings of two species of oak, namely Quercus robur and Quercus petraea from different seed size, in a greenhouse. The seedlings were harvested at different stages; after emergence, at the first shoot fully developed, and after the seedling had re- grown after the initial shoot was clipped. The result showed that: firstly, at the time of full seedling development, large seeds translocated less percentage of reserve from the seed to seedling. After clipping, the seedlings from large seeds translocated additional resources to the seedling. Secondly, although the larger seed has the larger biomass to re-sprout, the total mass invested in re-sprouting proportional with seedling size. We concluded that the seedlings of larger seeds re-sprout better than those of the smaller seeds. However, we did not find the improved performances correlating with the Reserve Effect Theory

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DEB, DEBAL, JÖRG LÄSSIG, and MARIUS KLOFT. "A CRITICAL ASSESSMENT OF THE IMPORTANCE OF SEEDLING AGE IN THE SYSTEM OF RICE INTENSIFICATION (SRI) IN EASTERN INDIA." Experimental Agriculture 48, no. 3 (2012): 326–46. http://dx.doi.org/10.1017/s001447971200004x.

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SUMMARYA survey of the system of rice intensification (SRI)-related literature indicates that different authors have drawn conflicting inferences about rice yield performances under the SRI, chiefly because the SRI methodology has been variously advocated, interpreted and implemented in the field using different rice varieties, seedling ages at transplantation, cultivation seasons and nutrient management regimes. In particular, the SRI method of single-seedling transplantation (SST) has potential economic advantage due to reduced seed costs, but it is not clear whether SST is an effective management strategy across a range of seedling ages, and whether there is any specific seedling age that is optimal for yield improvement of a given rice variety. This is an important consideration in rain-fed ecosystems where variable rainfall patterns and lack of controlled irrigation make it difficult to reliably transplant at a specific seedling age as recommended for the SRI. We conducted a five year-long experiment on a rain-fed organic farm using a short-duration upland and a medium-duration lowland landrace, following the SRI methodology. Rice seedlings of different ages (6, 10, 14, 18 and 28 days after establishment) were transplanted at 25 cm × 25 cm spacing in three replicated plots. The performance for each landrace was examined with respect to productive tillers, panicle density, total grain counts per hill and grain yield per unit area. Performances of seedlings of different ages were compared with that of control plots that employed all SRI practices with the exception that 28-day-old seedlings were transplanted with three seedlings per hill. The results indicate that (1) the SRI can improve mean panicle density if seedling age ≤ 18 days, but that responses differ between varieties; (2) the number of productive tillers per hill is significantly less in SST than that of multiple seedling transplants (MST) of 28-day-old seedlings of both upland and lowland varieties; (3) the total grain numbers per hill of the lowland variety is significantly greater for 14-day-old SST than 28-day-old MST; (4) the grain yield per unit area from young SRI transplants is significantly greater than that from 28-day-old MST for the lowland variety, although the magnitude of the improvement was small; (5) for the upland variety, grain yields declined with the oldest seedlings, but planting multiple seedlings per hill made the yield of the oldest transplants on par with that of younger seedlings planted singly. Our findings suggest that transplanting younger seedlings under the SRI management may not necessarily enhance grain yields.

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Bi, Yinli, Linlin Xie, Zhigang Wang, Kun Wang, Wenwen Liu, and Wenwu Xie. "Arbuscular mycorrhizal symbiosis facilitates apricot seedling (Prunus sibirica L.) growth and photosynthesis in northwest China." International Journal of Coal Science & Technology 8, no. 4 (2021): 473–82. http://dx.doi.org/10.1007/s40789-021-00408-6.

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AbstractArbuscular mycorrhizal (AM) fungi can successfully enhance photosynthesis (Pn) and plants growth in agricultural or grassland ecosystems. However, how the symbionts affect species restoration in sunlight-intensive areas remains largely unexplored. Therefore, this study’s objective was to assess the effect of AM fungi on apricot seedling physiology, within a specific time period, in northwest China. In 2010, an experimental field was established in Shaanxi Province, northwest China. The experimental treatments included two AM fungi inoculation levels (0 or 100 g of AM fungal inoculum per seedling), three shade levels (1900, 1100, and 550 µmol m−2 s−1), and three ages (1, 3, and 5 years) of transplantation. We examined growth, Pn, and morphological indicators of apricot (Prunus sibirica L.) seedling performances in 2011, 2013, and 2015. The colonization rate in mycorrhizal seedlings with similar amounts of shade is higher than the corresponding controls. The mycorrhizal seedling biomass is significantly higher than the corresponding non-mycorrhizal seedling biomass. Generally, Pn, stomatal conductance (Gs), transpiration rate (Tr), and water use efficiency are also significantly higher in the mycorrhizal seedlings. Moreover, mycorrhizal seedlings with light shade (LS) have the highest Pn. WUE is increased in non-mycorrhizal seedlings because of the reduction in Tr, while Tr is increased in mycorrhizal seedlings with shade. There is a significant increase in the N, P, and K fractions detected in roots compared with shoots. This means that LS had apparent benefits for mycorrhizal seedlings. Our results also indicate that AM fungi, combined with LS, exert a positive effect on apricot behavior.

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Hutauruk, Deswidya, Dwi Suryanto, and Erman Munir. "ASAI ISOLAT BAKTERI KITINOLITIK BACILLUS SP. BK17 PADA MEDIA PEMBAWA TANAH GAMBUT DAN KOMPOS JANJANG KELAPA SAWIT DALAM MENGHAMBAT PERTUMBUHAN JAMUR PATOGEN SCLEROTIUM ROLFSII DAN FUSARIUM OXYSPORUM PADA KECAMBAH CABAI." JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA 16, no. 1 (2016): 61. http://dx.doi.org/10.23960/j.hptt.11661-70.

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Assay of chitinolytic bacterial isolate of Bacillus sp. Bk17 in peat and palm oil bunch compost as carrier media in inhibiting Sclerotium rolfsii and Fusarium oxysporum of chilli seedlings. Sclerotium rolfsii and Fusarium oxysporum have been known as causal agents of seedling-off of chilli. Biological control has been used as an alternative control to replace chemical control. This study was aimed to determine the viability and ability of chitinolityc bacteria Bacillus sp. BK17 in carrier media of peat and palm oil bunch compost and in growing media to control seedling-off caused by S. rolfsii dan F. oxysporum of chilli. Our previous study showed that Bacillus sp. BK17 could reduce disease severity and intensity. Bacterial viability was measured as colony number grown after 90 days of storage in minimum salt medium with colloidal chitin as sole C source. Reduction of disease infection was measured as seedling number infected by S. rolfsii dan F. oxysporum. Seedling performances were measured as seedling height, leaf number and dry-weight after 30-days of growth. The result showed that bacterial cell viability was still high in both peat and palm oil bunch compost both with and without colloidal chitin addition after 90 days of storage. It was also shown that during application bacterial cell could grow. Seedling performaces i.e. seedling height, leaf number and dry-weight showed to be normal or even increase compared to those of pathogenic fungal inoculation only and (-) control.

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Bhuiyan, MAH, ME Ali, MR Khatun, F. Alam, and MB Banu. "Performances of different sources of arbuscular mycorrhiza on tomato (Lycopersicon esculentum) seedlings." Bangladesh Journal of Agricultural Research 39, no. 1 (2014): 23–31. http://dx.doi.org/10.3329/bjar.v39i1.20067.

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An experiment on the effect of different sources of Arbuscular mycorrhiza (AM) fungi on tomato seedlings (var. Roma VF) was conducted at the Bangladesh Agricultural Research Institute, Gazipur during rabi 2007-08 and 2008-09. Eight sources of AM fungi viz., AM-01 (Jessore), AM-02 (Rahmatpur), AM-03 (Joydebpur), AM-04 (Ullapara), AM-05 (Jamalpur), AM-06 (Hathazari), AM-07 (Ishurdi), and AM-08 (Rajshahi) were studied along with a control and mixed sources on tomato seedlings. Soil based AM inoculum at the rate of 2.0 kg/m2 was used. Biomass yield of tomato (Roma VF) increased from 14.8% to 53.6% in 2007-08 and 32.1% to 58.4% in 2008-09 over control by inoculation with different sources of AM. The highest biomass yield (301 mg/seedling) of tomato (Roma VF) was observed with AM-05 (Jamalpur source), which was higher to all AM sources except AM-07 (Ishurdi source). Nutrient uptake by tomato seedlings was improved by inoculation with AM fungi. The AM fungi from all the sources appeared to be effective in enhancing the growth and development of tomato seedlings. DOI: http://dx.doi.org/10.3329/bjar.v39i1.20067 Bangladesh J. Agril. Res. 39(1): 23-31, March 2014

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PADILHA, MATHEUS SANTIN, CILEIDE MARIA MEDEIROS COELHO, and GISIANE CAMARGO DE ANDRADE. "SEED RESERVE MOBILIZATION EVALUATION FOR SELECTION OF HIGH-VIGOR COMMON BEAN CULTIVARS." Revista Caatinga 33, no. 4 (2020): 927–35. http://dx.doi.org/10.1590/1983-21252020v33n407rc.

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ABSTRACT The efficiency of seed reserve mobilization (SRM) can be affected by genotype characteristics and seed initial physiological quality, which are determinant for the choice of cultivars that present plants with high physiological performances. The objective of this study was to evaluate the SRM in different common bean cultivars with different vigor and determine the differences in this process between seed lots and cultivars. Six common bean cultivars were grown in the 2017-2018 and 2018-2019 crop seasons in Lages, Santa Catarina, Brazil. The physiological quality of the cultivars was defined by germination test, accelerated aging test, seedling length, and vigor index, establishing two vigor groups (high vigor and low vigor). SRM was evaluated based on seed and seedling dry weights, use of seed reserves, use rate of seed reserves, SRM rate to the seedling, and use efficiency of seed reserves. The high-vigor cultivars presented higher use rates of seed reserves, SRM rate to the seedling, and use efficiency of seed reserves, favoring the development of vigorous seedlings. The evaluation of SRM is an alternative to improve control of internal seed quality and selection of high-vigor common bean cultivars.

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Rossi, Lorenzo, Lukas M. Hallman, Sawyer N. Adams, and Walter O. Ac-Pangan. "Impact of a Soil Conditioner Integrated into Fertilization Scheme on Orange and Lemon Seedling Physiological Performances." Plants 9, no. 7 (2020): 812. http://dx.doi.org/10.3390/plants9070812.

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Growers in Florida face unique challenges regarding maintaining proper citrus nutrition. Poor draining soils with low fertility, low C.E.C., and high rates of leaching are common in this region. In response to these challenges, interest has grown in products labeled as soil conditioners. Using a completely randomized experimental design, this greenhouse study tested the effects of 5 different combinations of a traditional fertilizer (TF) and a new soil conditioner (SC) on lemon and orange seedling physiology. Eight-month-old ‘Bearss’ lemon and ‘Valencia’ sweet orange grafted on sour orange rootstocks were employed, and five repetitions were used for each treatment. Plant biomass (dry weight), height, stem diameter, chlorophyll content, stomatal conductance and nutrient uptake were analyzed after 120 days of treatment. The results show that SC has a positive impact upon both chlorophyll levels and stomatal conductance values in both orange and lemon seedlings. However, based on dry weight growth data, we can only conclude that the SC was effective for orange seedlings at 50% TF and 0.5% SC. Based on this short 120-day evaluation, the SC achieved positive growth promotion for orange (50% TF) but not for lemon seedlings.

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SALAM, MOIN U., JAMES W. JONES, and KAZUHIKO KOBAYASHI. "PREDICTING NURSERY GROWTH AND TRANSPLANTING SHOCK IN RICE." Experimental Agriculture 37, no. 1 (2001): 65–81. http://dx.doi.org/10.1017/s0014479701001016.

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Seedling growth in the nursery and the magnitude of shock experienced by the seedlings after transplanting can affect subsequent growth and development of transplanted rice (Oryza sativa). These two processes have not been adequately represented by rice growth simulation models. In this study, seedling growth in the nursery was described with respect to endosperm mobilization, dry matter (DM) distribution and seed size. In addition, the transplanting shock process was represented describing the crop development and growth in relation to seedling age at transplanting. These relationships, as two sub-models, were incorporated into CERES-Rice, a rice growth model, and their performances compared with independent field data. The nursery growth sub-model was also evaluated with another model, RIBHAB. Results of the comparison showed that the nursery growth sub-model, either with CERES-Rice or RIBHAB, closely predicted observed seedling growth. On the other hand, CERES-Rice overestimated root and leaf DM and underestimated culm DM, while RIBHAB underestimated all the growth traits considered in the evaluation. Transplanting shock period predicted by the sub-model closely mimicked observation, whereas CERES-Rice highly overestimated it. It is concluded that the developed nursery growth and transplanting shock sub-models can be incorporated into CERES-Rice and other rice growth models for better simulation of those growth processes.

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Nasiro, Kalifa. "INFLUENCE OF SEED INITIAL MOISTURE CONTENT, STORAGE CONDITION AND TIME OF STORAGE ON SEEDLING GROWTH STAGES OF COFFEE (COFFEA ARABICA L.)." Agrobiological Records 4 (2021): 1–7. http://dx.doi.org/10.47278/journal.abr/2020.024.

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Coffee is one of the most important agricultural products in the international market and many countries are involved in its production, trade or consumption. Arabica coffee is self-pollinated, homozygous, and normally propagated by seeds. Seeds have been considered intermediate storage behavior with varying results. It is highly desirable that seeds are stored safely to optimize coffee seedling production at the appropriate time and season. The objective of this study was to evaluate the effect of storage temperature, time of storage and initial seed moisture contents on early seedling performances of coffee seeds and to determine the appropriate seed handling method. In this experiment, the influence of initial seed moisture content with four levels (12, 17, 22 & 27%) with storage two temperature (15oC & ambient), time of storage with six levels (sowing after each month and upto 6 months) and on coffee seedling growth stages were studied in a split-split-plot factorial design. The data collected were subjected to ANOVA. The storage environment with cold temperature (15oC) accelerated seedling growth stages parameters much better performances than did ambient temperature condition. All tested seedling growth stages were faster at initial time of storage. After third month seed quality drastically reduced especially under ambient storage condition. Seeds dried to 12% moisture content showed delayed performance throughout the trial period. Seeds with 27% initial moisture content took shorter days to reach at different growth stages at initial storage time but when aged took much days. Storage temperature, time of storage and initial seed moisture contents showed highly significant main and interaction effects and seeds dried to intermediate moisture level (17 and 22%), stored under cold temperature and sown at early times resulted in enhanced seedling growth. It was concluded that drying coffee seeds to 17% to 22% moisture contents and kept under storage with relatively lower temperatures (15oC) for not more than six months of storage showed better performance.

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Waruwu, Filsafat, Bilman Wilman Simanihuruk, Prasetyo Prasetyo, and Hermansyah Hermansyah. "PERTUMBUHAN BIBIT KELAPA SAWIT DI PRE-NURSERY DENGAN KOMPOSISI MEDIA TANAM DAN KONSENTRASI PUPUK CAIR Azolla pinnata BERBEDA." Jurnal Ilmu-Ilmu Pertanian Indonesia 20, no. 1 (2018): 7–12. http://dx.doi.org/10.31186/jipi.20.1.7-12.

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[GROWTH OF OIL PALM SEEDLINGS IN PRE-NURSERY UNDER DIFFERENT MEDIA COMPOSITIONS AND CONCENTRATIONS OF Azolla pinnata LIQUID FERTILIZER]. Vigourous seedling is prerequisite to successful production of oil palm. Aside from the genetic quality of the planting material, supply of nutrients during early growth of the seedling play an important role in determinting the overall seedling performances. This study was performed to determine the best combination of media composition and concentration of liquid fertilizer made of Azolla pinnata for oil palm seedling growth during pre-nursery. A factorial arrangement of the treatments involving growing media consisted of different composition of oil palm empty fruit bunches compost and soil (1: 1, 1: 2, and 2: 1 v/v) and different concentration of Azolla pinnata liquid fertilizer applications (0, 20, 40, and 60 mL/L) were arranged in a randomized complete block design with three replications. Data were collected for leaf number, stem diameter, seedling height, and leaf greenness at 30, 60, and 90 days after sowing (DAS). A significant interaction effect between the treatments was observed on leaf number at 60 and 90 DAS. A further regression analysis revealed that the highest number of leaves (4.3 at 60 DAS and 6.9 at 90 DAS) were attained on the media composition of 1:1 with liquid fertilizer application at 37.5 and 56 mL/L, respectively. Seedling height and stem diameter at 90 DAP showed quadratic responses to the increasing concentration of the liquid fertilizer applications. The maximum seedling height (26.22 cm) was attained at the liquid fertilizer concentrations of 36.21 mL/L. Similarly, the maximum stem diameter (7.43 mm) was attained at the concentration of 51.00 ml/L. The leaf greeneess at 60 DAS was increased in a linear fashion with the increasing concentration of the liquid fertilizer.

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Dissertations / Theses on the topic "Seedling performances"

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Bo, Sann. "Functional Trait Based Community Assembly in a Secondary Tropical Dry Forest (熱帯乾燥地の二次林における機能形質に基づいた群集形成)". 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225668.

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Clarke, Jodie Johnson. "Development of a Greenhouse Tobacco Seedling Performance Index." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33863.

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Tobacco seed performance is traditionally measured as percentage germination at 14 d under controlled laboratory conditions. However, under greenhouse conditions, seed lots with equal 14-d germination may exhibit substantial differences in uniformity of early seedling growth and spiral root incidence that impact the number of usable transplants. A seedling performance index (SPI) was developed to quantitatively describe greenhouse tobacco seedling performance. The 14-d emergence, relative leaf area uniformity, and seedling leaf area determined by computer image analysis were used to calculate the index. Greenhouse tobacco seed trials demonstrated that seed with the Rickard pellet had higher emergence, but the higher spiral root incidence associated with the Rickard pellet lowered the SPI compared to the Cross Creek pellet. Primed seed lots of flue-cured cultivars (NC 72 and NC 71) had a significantly higher SPI than the nonprimed seed lots at one location but not at a second location. Seed lots sown in Premier Pro-Mix TA commercial medium had a higher spiral root incidence, which resulted in a lower SPI compared to Carolina Choice, Carolina Gold, and Sunshine LP5 commercial media. The index quantitatively determined differences in seedling performance under greenhouse conditions not reflected by standard germination tests. Significant differences in the SPI were observed among seed lots with certified 90% germination. The SPI is a simple method to describe seedling performance because the data used to calculate the SPI is obtained from one seed tray image. In contrast, frequent counting and seedling evaluations are involved with standard germination and vigor tests.<br>Master of Science

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Holgén, Per. "Seedling performance, shelter tree increment and recreation values in boreal shelterwood stands /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5854-4.pdf.

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Crowell, Michelle Dawn. "Performance of Pinus sylvestris seedlings in a restoration of Caledonian forest." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624989.

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England, David M. "Seeding Treatments to Enhance Seedling Performance of the Bulrushes Bolboschoenus Maritimus, Schoenoplectus Acutus and S. Americanus in Wetland Restorations." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7659.

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A major goal in restoration is to reestablish native plant communities. There are several ways to reestablish species, but for large areas the most logistically feasible approach is to sow seed of desirable species. However, most wetland seeds are buoyant and are extremely difficult to establish in designated areas before floating away. In upland areas, tackifiers have been used to stabilize hill slopes from erosion and to keep seeds in place. The tackifier works as an adhesive that binds the seeds to the soil. However, the use of a tackifier has not been widely employed in wetland restorations, and prior to its broad implementation into wetland restoration practice, it is important to determine if tackifiers will hold up in wetland conditions. In greenhouse studies, we tested the effectiveness of different tackifier types and concentrations on Bolboschoenus maritimus seedling emergence, the influence of soil moisture and flooding on the duration of tackifier effectiveness, the effect of a mulch addition on tackifier effectiveness (Bolboschoenus maritimus, Schoenoplectus acutus and S. americanus), the effectiveness of pre-germination in enhancing Bolboschoenus maritimus seedling emergence using a tackifier, and the effectiveness of tackifier over time. We concluded that the use of a tackifier was effective at keeping seeds from washing away for at least 15 days, a mulch addition did not enhance tackifier effectiveness, and pre-germination did not benefit B. maritimus seedling emergence. The results from this study provide strong evidence that the use of a tackifier could be an effective solution to establish bulrush species in designated areas in wetland restorations.

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Wyss, Lozano Hoyos Tania. "Pinus elliottii var. densa Seedling Performance Reflects Ectomycorrhizas, Soil Nutrient Availability and Root Competition." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/496.

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Ectomycorrhizas generally improve seedling mineral nutrition and growth, so I hypothesized that decline of the Florida native pine variety Pinus elliottii var. densa Little & Dorman is related to deficiency of appropriate ectomycorrhizal (ECM) fungi in the pine's native flatwoods. At Archbold Biological Station I examined how quickly ECM fungi colonize P. elliottii var. densa seedlings and I compared the effect of local absence versus presence of adult pines on ECM colonization and pine seedling performance. Under controlled greenhouse conditions, I investigated how a wide range of ECM colonization and spread of extraradical mycelium throughout a large volume of relatively infertile, flatwoods soil enhance the mineral nutrition and growth of pine seedlings. In a field bioassay, I transplanted two-month-old pine seedlings to three flatwoods sites with low (4 pines/400 square m), medium (9 pines/400 square m), and high (19 pines/400 square m) adult pine densities. I subsequently excavated seedlings every two weeks for four-and-a-half months and determined their ECM colonization, response to shade, and response to surrounding grass density. Across all sites, pine seedlings in high shade had a higher mean chlorophyll concentration and lower stem dry weight than in full sun. Competition with grass reduced seedling survival and stem dry weight. Initial colonization was rapid and not different among sites, with 5.4 % of roots colonized 15 days after transplant. Pine seedlings had midpoint means of 29.5 %, 18.1 % and 21.3 % ECM root tips in low, medium and high adult pine density sites, respectively, suggesting that pine seedlings establishing in flatwoods encounter sufficient ECM fungi to support their growth, regardless of adult pine density. In a field experiment, I determined in the presence versus absence of adult pines if pine seedlings had higher ECM colonization and consequent improved survival, mineral nutrition, and growth. Within and beyond pine stands, I transplanted seedlings into intact or drilled, hyphae in-growth pipes buried in the ground. I placed autoclaved or fresh ECM root inoculum in two sets of intact pipes, and autoclaved inoculum in drilled pipes into which mycorrhizal hyphae could extend from the surrounding vegetation. Seven-and-a-half months after transplant, ECM hyphae had penetrated the drilled pipes and colonized pine seedlings, but roots from the surrounding vegetation also penetrated pipes. Extraneous roots reduced the survival of seedlings both within and beyond pine stands, but extraneous roots reduced seedling growth only beyond pine stands. Because percentage ECM root tips was higher in the presence (53 %) than in the absence (38.8%) of adult pines, pine stands might benefit the competitive ability of seedlings by increased ECM colonization and possibly by common mycorrhizal networks connecting seedlings to adults. Because beneficial effects of ECM in the field were small, I also examined ECM effects on pine seedlings in a greenhouse experiment. I manipulated ECM fungus colonization and the volume of flatwoods soil to which extraradical mycelium had access. In a small volume of soil (220 mL), fresh ECM root inoculum promoted the mycorrhizal colonization of seedlings versus those receiving autoclaved roots, but seedling growth and uptake of Mg, Ca, and Zn was lower with fresh than with autoclaved root inoculum. Growth and mineral nutrient uptake likely was enhanced by a pulse of nutrients from autoclaved roots, but for inoculated plants may have been reduced because of nutrient retention by saprotrophic microorganisms degrading fresh ECM roots and because of mineral nutrient retention by ECM fungi. Ectomycorrhizal seedlings with extraradical mycelium access to a large soil volume had higher mean chlorophyll concentration than those in a small soil volume. Weekly disturbance of the extraradical mycelium, however, reduced foliar contents of Mn, K, P, N, and Zn by one-third to one-half, and reduced needle dry weight of seedlings by one-third, demonstrating the importance of extraradical mycelium accessing a large volume of soil when it is nutrient-poor. My research demonstrates that ECM fungi are widespread in flatwoods and rapidly colonize pine seedlings. ECM fungus inocula are greater in the presence than in the absence of adult pines, and ECM or seedlings' connections to a common mycorrhizal network improve seedlings' belowground competitive ability. ECM especially enhance seedling mineral nutrition and growth when undisturbed, extraradical mycelium extends throughout a large volume of soil. Populations of Pinus elliottii var. densa might best regenerate in flatwoods if seedlings recruit near adult pines and where there is little competition for light, water, and mineral nutrients.

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Cloutier, Renée R. "Effects of nutrient addition mode on jack pine, Pinus banksiana Lamb., seedling outplanting performance." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0026/MQ31420.pdf.

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Németh, M. Barbara. "Pollen Performance and Seedling Vigor in Laboratory and Natural Populations of Clarkia Unguiculata (Onagraceae)." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1117816212.

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Serafim, João Afonso Machado Pinto de Aguiar. "Assessing the role of macro- and microclimate on Holm oak performance in Mediterranean drylands." Master's thesis, ISA, 2019. http://hdl.handle.net/10400.5/21285.

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Mestrado em Biologia dos Recursos Vegetais / Instituto Superior de Agronomia / Faculdade de Ciências. Universidade de Lisboa<br>Mediterranean drylands are expected to become drier due to climate change. This may aggravate desertification by increasing dryland susceptibility to land degradation, leading to the loss of biodiversity and ability to provide ecosystem services. In Mediterranean Basin drylands, a large area is occupied by oak woodlands, a semi-natural agro-silvopastoral system called Montado in Portugal. In the drier areas, where Montado seems to act as a buffer against desertification, the dominant tree species is Holm oak (Quercus ilex subsp. rotundifolia), However, in the last decades, a declining trend has been reported for Holm oak woodlands, mostly attributed to unsustainable land management, biotic factors and to an increase in aridity at a regional scale. Also, at a local scale, it has been shown that microclimate conditions driven by topography have a major influence on this species natural regeneration rates. Over the last decades, many (re)afforestation with Holm oak have been implemented to revert Montado’s decline and combat desertification, although not always successful. The aim of this work was to study the effect of macro- and microclimate on Holm oak performance, specifically on acorn germination and first summer seedling survival. Holm oak acorns were collected along a climatic gradient based on long-term precipitation (30 yrs.), resulting in 6 macroclimate provenances. In 2 sites, the driest and the wettest sites of the gradient, areas with contrasting microclimates were selected using Potential Solar Radiation (PSR) as a proxy of microclimate conditions. Holm oak performance was, thus, studied along a macroclimate gradient and in microclimate contrasting conditions. Holm oak acorns from each provenance where characterized biometrically and acorn production evaluated. Germination of acorns and seedling survival were evaluated under greenhouse similar conditions and in the field under contrasting macro- and microclimate conditions. We found that macro- and microclimatic provenance influences acorn size and germination. Drier sites and more exposed areas (higher PSR) had bigger acorns with higher germination. Field conditions did not seem to affect germination but rather the first summer seedling survival. The survival of Holm oak seedlings to the first summer was significantly higher in the wetter site and in less exposed areas than in the drier site and in more exposed areas. This work provides guidelines to increase Holm oak seedling quantity and quality in nurseries to be used in (re)afforestation plans and to improve Holm oak young seedling survival, either by focusing (re)afforestation in microclimatic favorable areas (using remote sensing derived information like PSR), or by providing additional assistance to seedlings growing in drier and/or more exposed areas. In addition, it may also help to better understand Holm oak seedling mortality and/or natural regeneration patterns. Hence, these findings may contribute to improve the success of Holm oak (re)afforestation as a critical restoration tool to combat desertification in Portuguese drylands, and revert Holm oak Montado’s decline, particularly under a climate change scenario<br>N/A

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Correia, António Henrique Costa Gomes Soares. "Designing Eucalyptus globulus Labill. seedlings morphology using nitrogen fertilization during nursery production." Master's thesis, ISA, 2010. http://hdl.handle.net/10400.5/15195.

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Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia<br>A Eucalyptus globulus Lab. Situa-se como a terceira espécie mais importante ao nível da área florestal Nacional, de extrema importância na indústria florestal, utilizada como material base na produção de pasta de papel (CELPA, 2009). Neste trabalho produziram-se plantas de Eucaliptus globulus, utilizando quatro níveis de fertilização, em condições semelhantes às utilizadas em viveiros comerciais com o objectivo de (1) modelar o crescimento (dimensões das plantas e periodo de produção), tendo em conta os limites legais morfológicos impostos por decreto lei (Decreto-Lei) e (2) desenvolver indicadores de qualidade das plantas de forma a estimar a sua performance no campo. Os resultados demonstram que existiu correlação entre crescimento de raízes finas e a performance no campo. A correlação observada entre conteúdo de clorofila e o conteúdo em azoto das plantas permite optimizar a produção, pela avaliação das necessidades em azoto que as plantas apresentem. A fertilização azotada revelou um grande impacto no crescimento potencial das raízes. O fornecimento de 40 mg de N (nível de fertilização N40) produz plantas com maior capacidade de sobrevivênvia e performance, aplicado a partir dos 2 meses de produção--------------------------------ABSTRACT - Tasmanian blue gum (Eucalyptus globulus Labill) is the third most important specie in the Portuguese forest cover, highly relevant in the forestry industry, and raw material used for pulp and paper production (CELPA, 2009). Growth of this short rotation species in the field is dependent on the initial growth in the nursery. In this experiment, seedlings of Eucalyptus globulus Labill were grown with four levels of Nitrogen (N) fertilization, under growth conditions similar to those used in nursery commercial production, with the objectives of (1) modelling growth (planting stock size and production period), taking into account the legal regulation limits imposed by law (Decreto-Lei) and (2) to develop indicators of seedlings quality to estimate their performance in the field. Results showed high correlation between fine roots growth and field performance. The correlation between chlorophyll content and N seedling content observed allows to optimize seedling production, through the assessment of N needs of seedlings. N nutrition reveals high impact on root growth potential. 40 mg of total supplied N (N40 nutrition level) produces good quality seedlings, applied since 2 month seedlings<br>N/A

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Books on the topic "Seedling performances"

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Canada, National Research Council, ed. Ecophysiology of northern spruce species: The performance of planted seedlings. NRC Research Press, 2000.

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Menes, Peter A. Comparative performance of bareroot and container-grown seedlings: An annotated bibliography. Ontario Ministry of Natural Resources, 1996.

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Cloutier, Renée R. Effects of nutrient addition mode on jack pine (Pinus banksiane Lamb.) seedling outplanting performance. Laurentian University, Department of Biology, 1997.

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DeLong, C. Planting white spruce under trembling aspen: 7-year results of seedling condition and performance. British Columbia Ministry of Forests Research Program, 2000.

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Smith, R. B. Impacts of skidroads on properties of a calcareous, loamy soil and on planted seedling performance. Pacific Forestry Centre, 1994.

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Zasada, John C. Field performance in southeast Alaska of Sitka spruce seedlings produced at two nurseries. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1990.

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Zasada, John C. Field performance in southeast Alaska of Sitka spruce seedlings produced at two nurseries. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1990.

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Timmer, V. R. Manual for exponential nutrient loading of seedlings to improve outplanting performance on competitive forest sites. Great Lakes Forestry Centre, 1996.

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McMinn, R. G. Development of planting tool for long-rooted seedlings to optimize inverted humus mound performance. Forestry Canada, 1990.

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Hatchell, Glyndon E. Nursery cultural practices and morphological attributes of longleaf pine bare-root stock as indicators of early field performance. Southeastern Forest Experiment Station, 1990.

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Book chapters on the topic "Seedling performances"

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Bass, L. N., C. R. Gunn, O. B. Hesterman, and E. E. Roos. "Seed Physiology, Seedling Performance, and Seed Sprouting." In Agronomy Monographs. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/agronmonogr29.c31.

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Castellano, Michael A. "Outplanting performance of mycorrhizal inoculated seedlings." In Concepts in Mycorrhizal Research. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-017-1124-1_9.

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Mallikarjuna, P. B., and D. S. Guru. "Performance Evaluation of Segmentation of Frog-Eye Spot Lesions on Tobacco Seedling Leaves." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27308-7_48.

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Cascio, Chiara, Filippo Bussotti, Reto J. Strasser, and Riccardo Marzuoli. "Variability of Photosynthetic Performances in Tree Seedlings Under Ozone and Water Stress." In Photosynthesis. Energy from the Sun. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6709-9_305.

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Mohammed, Anisah, Mohamad Amir Shah Yusop, and Nur Ain Zubaidah Amran. "Utilization Effects of Asystasia intrusa Compost Toward the Growth Performance of Elaeis guineensis Seedling." In Regional Conference on Science, Technology and Social Sciences (RCSTSS 2016). Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0074-5_92.

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Bártik, M., and J. Gloser. "Photosynthetic Performance of Acer pseudoplatanus L. Seedlings as Affected by Light Availability and Source of Nitrogen." In Photosynthesis: Mechanisms and Effects. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_638.

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Famuwagun, Idowu B., and Titilayo Oladitan. "Influence of Varying Rates of Fertilizers on the Performance of Cacao (Theobroma cacao) Seedlings in the Nursery." In Just Enough Nitrogen. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58065-0_4.

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Yusop, Mohamad Amir Shah, Anisah Mohammed, and Muhamad Nazam Abdul Rahman. "The Dominant Effect of Cabomba furcata Compost as Non-native Invasive Species Towards the Growth Performance of Elaeis guineensis Seedling." In Regional Conference on Science, Technology and Social Sciences (RCSTSS 2016). Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0074-5_91.

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Poswal, M. A. T. "Survival of Xanthomonas Campestris Pv. Malvacearum and Performance of Seedlings from Commercially Ginned Cottonseed as Influenced by Length of Storage." In Plant Pathogenic Bacteria. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3555-6_155.

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Kodoh, Julius, and Mandy Maid. "Nursery Practices on Neolamarckia cadamba Seedlings’ Growth Performance." In Prospects and Utilization of Tropical Plantation Trees. CRC Press, 2019. http://dx.doi.org/10.1201/9780429442773-3.

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Conference papers on the topic "Seedling performances"

1

Zhang, Yong, Qiyang Chen, and Haoru Tang. "Variation on Photosynthetic Performance in Kiwifruit Seedling During Drought Stress and Rewatering." In 2018 International Workshop on Bioinformatics, Biochemistry, Biomedical Sciences (BBBS 2018). Atlantis Press, 2018. http://dx.doi.org/10.2991/bbbs-18.2018.13.

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Rahman, Nawmee Razia, Md Al Mehedi Hasan, and Jungpil Shin. "Performance Comparison of Different Convolutional Neural Network Architectures for Plant Seedling Classification." In 2020 2nd International Conference on Advanced Information and Communication Technology (ICAICT). IEEE, 2020. http://dx.doi.org/10.1109/icaict51780.2020.9333468.

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Zhang, Hao. "Effect of seedling age on the ovipositon and performance of Hessian fly (Mayetiola destructor) on wheat." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.114209.

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Klimenko, O. E., N. N. Klimenko, and N. I. Klimenko. "Biologization is the way to sustainable development of Crimean garden agrocenoses." In РАЦИОНАЛЬНОЕ ИСПОЛЬЗОВАНИЕ ПРИРОДНЫХ РЕСУРСОВ В АГРОЦЕНОЗАХ. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-15.05.2020.01.

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The intensification of agricultural production, which involves the use of highly productive plant varieties, high-performance equipment, high doses of mineral fertilizers and pesticides leads to soil degradation and environmental contamination. In this regard, alternative methods of agricultural production replace agricultural intensification. To increase the sustainability and environmental friendliness of garden agrocenoses it is necessary to reduce the chemical load and intensify biological processes by planting green manure crops and perennial herbs, as well as increase microbial diversity through application of microbial fertilizers. We offer the use of various methods of gardening biologization: sod-humus or green manure row spacing systems with different grasses and microbial fertilizers. We conducted comprehensive studies of the effect of MP on the growth and productivity of seedlings of stone fruit plants. The most effective MPs, their doses and methods of application for growing grafted annual seedlings of peach, cherry, apricot and cherry plum, as well as their effect on soil properties, have been determined. A joint positive effect of soil sodding with a mixture of cereal-bean perennial herbs and the use of MP on soil properties and ampelocenosis state in the foothill Crimea was established. In general, the use of biologization elements can increase soil fertility and fruit plants and grapes productivity by 10- 20 %.

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Reports on the topic "Seedling performances"

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Zasada, John C., Peyton W. Owston, and Dennis Murphy. Field performance in southeast Alaska of sitka spruce seedlings produced at two nurseries. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1990. http://dx.doi.org/10.2737/pnw-rn-494.

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Devine, Warren D., and Constance A. Harrington. Influence of four tree shelter types on microclimate and seedling performance of Oregon white oak and western redcedar. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2008. http://dx.doi.org/10.2737/pnw-rp-576.

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