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Relevant bibliographies by topics / Seedling survival

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Academic literature on the topic 'Seedling survival'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 June 2025

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Journal articles on the topic "Seedling survival"

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Herr, DG, LC Duchesne, R. Tellier, RS Mcalpine, and RL Peterson. "Effect of Prescribed Burning on the Ectomycorrhizal Infectivity of a Forest Soil." International Journal of Wildland Fire 4, no. 2 (1994): 95. http://dx.doi.org/10.1071/wf9940095.

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Ectomycorrhizae formation, seedling health index, and seedling survival were assessed for two-year-old nursery-grown seedlings of Pinus resinosa and Pinus strobus two months after planting in clear-cuts that had received prescribed burning under different fire intensities. Controls consisted of seedlings planted in unburned clear-cuts. Fire intensity positively correlated with percent ectomycorrhizal roots for P. strobus but not for P. resinosa. Seedling health index and survival were highest in burned-over sites as compared to control sites for both pine species. Fire intensity correlated with seedling health index for P. strobus but not for P. resinosa. Fire intensity correlated with seedling survival for both species. Colonization of seedlings by ectomycorrhizal fungi did not correlate with seedling health index or seedling survival. P. resinosa seedlings planted in burned-over sites had a smaller number of lateral roots per unit length primary/secondary roots compared to seedlings planted in control plots.

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Reid, J. Leighton, and Karen D. Holl. "Arrival ≠ Survival." Restoration Ecology 21, no. 2 (2013): 153–55. https://doi.org/10.5281/zenodo.13433285.

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(Uploaded by Plazi for the Bat Literature Project) Seed dispersal is commonly a limiting process in ecosystem recovery, and several recent studies have proposed novel methods for overcoming this important biological barrier, particularly in tropical pastures. Multiple experiments in various regions have shown that bird perches attract birds and increase seed dispersal but not seedling recruitment in degraded habitats. New bat-focused restoration applications, such as roost boxes and fruit oils, have proven capable of attracting animals and augmenting seed dispersal, but these applications have yet to be vetted by seedling establishment data. Seeds and seedlings in pastures have low probability of survival, attributable to predation, dessication, rot, and competition with ruderal vegetation. As such, these novel applications are unlikely to have the desired effect of accelerating tropical forest succession. Given that seed dispersal is meaningless if arriving seeds cannot survive, and that seedling recruitment measurements are not prohibitively difficult to take, we suggest that studies of novel seed dispersal techniques should include a measure of seedling recruitment. Without this information, it cannot be assumed that such applications accelerate forest recovery.

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Reid, J. Leighton, and Karen D. Holl. "Arrival ≠ Survival." Restoration Ecology 21, no. 2 (2013): 153–55. https://doi.org/10.5281/zenodo.13433285.

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(Uploaded by Plazi for the Bat Literature Project) Seed dispersal is commonly a limiting process in ecosystem recovery, and several recent studies have proposed novel methods for overcoming this important biological barrier, particularly in tropical pastures. Multiple experiments in various regions have shown that bird perches attract birds and increase seed dispersal but not seedling recruitment in degraded habitats. New bat-focused restoration applications, such as roost boxes and fruit oils, have proven capable of attracting animals and augmenting seed dispersal, but these applications have yet to be vetted by seedling establishment data. Seeds and seedlings in pastures have low probability of survival, attributable to predation, dessication, rot, and competition with ruderal vegetation. As such, these novel applications are unlikely to have the desired effect of accelerating tropical forest succession. Given that seed dispersal is meaningless if arriving seeds cannot survive, and that seedling recruitment measurements are not prohibitively difficult to take, we suggest that studies of novel seed dispersal techniques should include a measure of seedling recruitment. Without this information, it cannot be assumed that such applications accelerate forest recovery.

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Oka, Chihiro, Tomoyuki Itagaki, and Satoki Sakai. "Effects of the number of embryos in a seed and seed mass on seedling survival and growth in polyembryonic Ophiopogon japonicus var. umbrosus (Asparagaceae)." Botany 94, no. 4 (2016): 261–68. http://dx.doi.org/10.1139/cjb-2015-0214.

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Research on polyembryony suggests that the presence of multiple embryos in a seed confers an advantage for seedling survival. Because observations from embryo to seedling stages are lacking, however, the effect of the exact number of embryos on seedling survival is unclear. In this study, we evaluated the effect of seed embryo number on seedling survival and growth to determine the number of embryos in a seed that are advantageous for seedling survival in Ophiopogon japonicus (Thunb.) Ker Gawl. var. umbrosus Maxim., which is a taxon exhibiting cleavage polyembryony. We also investigated whether seed mass affects seed embryo number and seedling survival and growth. We found that the number of embryos in seeds of O. japonicus var. umbrosus was weakly dependent on seed mass. As the number of embryos increased, the number of seedlings surviving from seeds initially increased and then decreased; the greatest number of seedlings was produced from an intermediate number of embryos, with the number of embryos producing the greatest number of seedlings increasing with seed mass. The sum of individual seedling lengths increased with the number of seedlings. Our results indicate that an intermediate number of embryos may be advantageous in polyembryonic O. japonicus var. umbrosus.

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South, David B. "Needle-Clipping Longleaf Pine and Top-Pruning Loblolly Pine in Bareroot Nurseries." Southern Journal of Applied Forestry 22, no. 4 (1998): 235–40. http://dx.doi.org/10.1093/sjaf/22.4.235.

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Abstract Studies have shown that clipping needles of longleaf pine before outplanting can increase average seedling survival by 13 percentage points. Under some situations, the increase in survival might be due to a reduction in transpiration. For loblolly pine, top-pruning in the nursery might increase average survival by 6 percentage points. Benefits of pruning appear greater when seedlings experience stress after planting and when nonpruned seedlings have low root weight ratios (root dry weight/total seedling dry weight). On some droughty sites, a seedling with a 0.3 root weight ratio might have an 80% chance of survival, while a seedling with a 0.2 root weight ratio might only have a 53% chance of survival. In most studies where heights were measured after 3 yr in the field, pruned seedlings were the same height as nonpruned seedlings (± 7 cm). South. J. Appl. For. 22(4):235-240.

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South, David B., and Robert J. Mitchell. "Determining the "optimum" slash pine seedling size for use with four levels of vegetation management on a flatwoods site in Georgia, U.S.A." Canadian Journal of Forest Research 29, no. 7 (1999): 1039–46. http://dx.doi.org/10.1139/x99-048.

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A slash pine (Pinus elliottii Engelm. var elliottii) study was established to determine the "optimum" seedling size for use on a flatwoods site in the Coastal Plain physiographic province of Georgia, U.S.A. The optimum seedling is defined as the ideotype that will minimize overall reforestation costs while achieving established goals for initial survival and growth. Initial survival and fourth-year performance were examined in relation to (i) method of site preparation, (ii) herbicide application, and (iii) seedling class (based on root-collar diameter) and to associated establishment costs. Seedling class greatly influenced survival with large-diameter classes (8.5-11.5 mm) exhibiting the best survival (87-99%). Seedlings with 4.5-mm diameters averaged 75% survival. A second bedding pass (double bedding) reduced grasses and woody shrubs, and the herbicide imazapyr reduced grasses and herbaceous broadleaf weeds. Neither treatment improved pine survival. Use of 9.5 to 11.5-mm seedlings (without double bedding) produced larger trees 4 years after planting than 4.5-mm seedlings with double bedding. A simple cost analysis indicated the optimum seedling would be considerably larger (9.5-11.5 mm) in diameter than the "target" seedling (4.5 mm) typically produced at slash pine nurseries. For each dollar invested in establishment, planting the optimum pine seedling on this site resulted in greater gains in early survival and growth than either double bedding or use of imazapyr.

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Aizen, Marcelo A., and Hilary Woodcock. "Effects of acorn size on seedling survival and growth in Quercus rubra following simulated spring freeze." Canadian Journal of Botany 74, no. 2 (1996): 308–14. http://dx.doi.org/10.1139/b96-037.

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Seed size is an important phenotypic trait commonly associated with the fitness of young seedlings exposed to environmental stress. Spring frosts can cause leaf necrosis and seedling mortality in young oak seedlings, and seedling mortality following spring freeze events is a factor limiting the northern range limits of Quercus gambelii (Nutt.). We examined the relationship between acorn size and seedling survival following spring freeze by exposing 1-month-old Quercus rubra (L.) seedlings from two sites in Massachusetts to −3 °C for 8 h. Mortality of 1-month-old frost-exposed seedlings (20–25%) was 10 times higher than control mortality, with survival directly related to acorn size. Seedling size at the end of the first growing season was negatively affected by frost exposure and positively associated with acorn size. Overwintering mortality (<5%) was negatively associated with seedling size. The production of large acorns should confer a selective advantage in habitats susceptible to spring frosts through a positive effect on seedling establishment success under stress. Keywords: red oak, acorn size, frost, seedling survival.

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Santos, Gildomar Alves dos, David Francis Robert Philip Burslem, Milton Serpa de Meira Jr, and Stanislau Parreira Cardozo. "Introduction of native tree species into degraded Cerrado vegetation." Interação 21, no. 2 (2021): 61–84. http://dx.doi.org/10.53660/inter-102-s127.

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Experimental restoration using tree seedlings is a common strategy for accelerating succession on degraded post-agricultural land formerly occupied by Cerrado vegetation. Seedling growth in degraded tropical lands is constrained by various factors. The goal of this study was to evaluate the seedling growth and survival of seven native tree species used to accelerate forest recovery in a gully area with stressful environmental conditions. The experimental design involved fenced and unfenced blocks, presence and absence of fertilization and use of an adhesive to prevent ant herbivory (four treatments with four replicates). Seedlings were planted in December 2006 and collection of data on seedling basal diameter, height, mortality and herbivory started on January 24th 2007 and continued every three months, until final data collection on January 31st 2009 (9 measurement dates). Overall seedling survival was 38 % and protecting seedlings did not influence growth, but seedlings grew faster in response to the addition of fertilizer containing N, P and K. The use of the adhesive Tanglefoot to exclude leaf cutter ants had no influence on growth. Fencing reduced seedling mortality, but combining fencing with Tanglefoot did not. Nutrient availability limits seedling growth and survival in the gully. Direct planting of seedlings of native trees may accelerate succession in degraded Cerrado lands subject to interventions that overcome constraints on seedling growth and survival.

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Rustam, E., D. J. Sudrajat, N. Nurhasybi, N. Widyani, and S. Surono. "Possibility of bare-root seedling application for tropical forest and landscape restoration: A study on Gmelina arborea and Calophyllum inophyllum." E3S Web of Conferences 373 (2023): 05005. http://dx.doi.org/10.1051/e3sconf/202337305005.

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Container and bare-root seedlings are the two basic stock types used in reforestation programs in many countries, but in the tropics, bare-root seedlings have never been widely applied. The objective of this research was to assess the possibility of bare-root seedlings for tropical forest and landscape restoration treated by fertilization in the nursery and aquasorb treatment using two forest tree species, i.e., Calophyllum inophyllum and Gmelina arborea. A randomized block design was used to assess the seedling performance in nursery and aquasorb application on bare-root seedlings and container (polybag) seedlings as a comparison. This research indicated that NPK fertilization in the nursery was able to increase the seedling growth of C. inophyllum and G. arborea. In the field test, polybag seedlings had better survival and growth than bare-root seedlings. The best survival and growth in both species were shown by the polybag seedling with fertilization and aquasorb treatment. The treatment also increased the bare-root seedling growth in both species. Bare-root seedlings of C. calophyllum resulted in higher seedling survival than bare-root seedlings of G. arborea. The application of bare-root seedling on C. inophyllum is more prospective to be applied in the tropics.

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Oshima, Chiaki, Yuji Tokumoto, and Michiko Nakagawa. "Biotic and abiotic drivers of dipterocarp seedling survival following mast fruiting in Malaysian Borneo." Journal of Tropical Ecology 31, no. 2 (2014): 129–37. http://dx.doi.org/10.1017/s026646741400073x.

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Abstract:South-East Asian tropical rain forests experience sporadic, but profuse, seed production after general flowering, leading to the synchronous emergence of various seedlings and subsequent seedling dynamics, which play a crucial role in determining species distribution and coexistence. We examined the relative importance of both biotic (initial height, conspecific seedling density) and abiotic (canopy openness, per cent sand, soil water content) drivers using survival data for 1842 seedlings of 12 dipterocarp species for 1.5 y following mast fruiting in an old-growth Bornean tropical rain forest. More than 30% of all dipterocarp seedlings survived 1.5 y after mast fruiting. When all species were analysed together, we found that initial seedling height, canopy openness and conspecific seedling density affected dipterocarp seedling survival. Negative density dependence indicated that predators were not satiated, but dipterocarp seedlings rather suffered from host-specific natural enemies or intraspecific competition. Species-level analyses of seven dipterocarp species showed large variation in response to biotic and abiotic factors. These results suggest that interspecific differences in the relative importance of biotic and abiotic effects on seedling survival might contribute to species coexistence.

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Dissertations / Theses on the topic "Seedling survival"

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Telewski, Frank W. "The Impact of Ozone on Sequoia Seedling Stem Structure: Implications for Seedling Survival." Laboratory of Tree-Ring Research, University of Arizona (Tucson, AZ), 2013. http://hdl.handle.net/10150/302708.

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Izlar, Deborah Kay. "ASSESSMENT OF WHITEBARK PINE SEEDLING SURVIVAL FOR ROCKY MOUNTAIN PLANTINGS." The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-12272007-124748/.

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Whitebark pine (WBP) is a keystone species of Rocky Mountain alpine and subalpine areas. A pervasive non-native fungal disease (white pine blister rust), mountain pine beetle infestation, and successional replacement by shade-tolerant competitors following decades of fire exclusion have severely reduced whitebark pine and threaten these high-elevation ecosystems. Land managers are attempting to reverse whitebark pines decline by increasing regeneration of rust-resistant trees while restoring successional processes. Restoration efforts include the planting of whitebark pine seedlings and over 200,000 seedlings have been planted on National Forest, BLM and National Park service lands. In this Rocky Mountain (RM) study, select whitebark pine plantations were surveyed and seedling survival rates and ecological data collected. The purpose of this initial study was to determine overall survival rates for planted whitebark pine seedlings and to identify environmental conditions that have promoted high seedling survival. Data were analyzed at the site, plot and tree level. Microsites created by stumps, rocks and downed logs in close proximity to WBP seedlings greatly enhanced survival, seedling height and seedling growth during the first year after planting. Potential direct solar radiation was inversely related to WBP survival. Wet planting sites were detrimental to seedling survival. Results as to the effect of fire on seedling survival were inconclusive. However for 1st year seedlings it does appear that moderate, mixed or severe burning did result in much higher survival than unburned. To further understand the environmental conditions that affect seedling survival, an experimental planting was designed and monitored using the knowledge gained from the RM study. Seedling survival in this planting was statistically significantly associated with the presence of a microsite. And increased health of seedlings was associated with the presence of beneficial mycorrhizal associates. Only seedling located in burned or unburned whitebark pine communities were colonized with native fungi and colonization was higher for burned than for unburned sites. Whitebark pine seedlings are successfully being planted and it is possible to discern how different environmental conditions are affecting the survival, height, growth and health of planted seedlings.

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McGinley, Susan. "Temperature Makes the Difference: Improving Tomato Seedling Survival During Transport." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/622186.

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Myers, Jonathan Andrew. "Seedling carbohydrate storage, survival, and stress tolerance in a neotropical forest." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0009262.

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Weatherall-Thomas, Clayton Richard. "Seed dynamics and seedling survival in mainland thicket of the Eastern Cape." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/1048.

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Subtropical Thicket is the dominant vegetation biome in the Eastern Cape. Little regeneration through seedlings has been observed in Thicket. This is of serious concern, as Thicket has been degraded over large areas of its distribution. An understanding of the seed dynamics is necessary for any restoration project. A number of possible causes for the lack of seedlings were therefore investigated. Study sites were best classified according to the biogeographical regions of the Subtropical Thicket Ecosystem Planning (STEP) project. The seed bank of Thicket is dissimilar to the aboveground vegetation, as it lacks woody species and is dominated by herbs and grasses, making little contribution to the regeneration of Thicket species. An increase in canopy cover resulted in lower soil and air temperatures, as well as light, and an increase in litter depth. Seedling abundance and species richness increases with mean annual rainfall, with woody seedlings being dominant in the higher rainfall areas, and succulent species in the lower rainfall regions. Anemochorous species dominated the germinable seed bank, and zoochorous species were more prevalent underneath the canopy, compared to open areas, an indication of active seed dispersal. No germination was recorded in many Thicket species, and dormancy mechanisms were lacking in many of the species that did germinate. Immersion in hot water increased germination in the hard seeds of Acacia karroo, whereas shade enhanced germination in small seeded Burchellia bubalina. The response of seedlings of four Thicket species with varying distribution to shade and drought was studied. Ptaeroxylon obliquum and Aloe africana are drought tolerant species, whereas Burchellia bubalina and Rhus dentata were intolerant to low soil moisture. All four species were able to grow in deep shade, although Rhus dentata would be classified as a shade avoider, unlike the other three species that are shade tolerant. This results in the four species having different regeneration niches. It was concluded that dispersal and the lack of “safe sites” for seedlings were the main limitations to seedling establishment in Mainland Thicket.

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Cordazzo, Cesar Vieira. "Comparative population studies of four dominant plants of southern Brazilian coastal dunes." Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241475.

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Mallinson, Julian Robert. "The impact of herbivores on the natural regeneration of temperate deciduous woodland." Thesis, Durham University, 1999. http://etheses.dur.ac.uk/4591/.

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Many studies have reported deficient or intermittent patterns of natural regeneration in temperate deciduous woodland. The present study aimed to assess the relative impact of herbivore-mediated plant mortality on the natural regeneration dynamics of representative tree species (Acer pseudoplatanus, Betula pendula, Fraxinus excelsior, Ilex aquifolium, Sorbus aucuparia, Taxus baccata and Ulmus glabra) in representative temperate deciduous woodland (Shipley Wood and Derwent Gorge, County Durham). Sapling density and the density, spatial association and size distribution of adult tree populations varied significantly between tree species and study sites, reflecting contrasting patterns of current and historical regeneration. Rates of post-dispersal seed predation and seedling herbivory were quantified using field-based 'cafeteria' trials. Rodents were the principal agents responsible for seed predation, whereas seedling herbivory was attributable to a mixed suite of herbivores including invertebrates, rodents and larger mammals. Rates of seed predation and seedling herbivory varied significantly between tree species, most likely reflecting individualistic, trade-off responses to chemical and physical attributes. Fine-scale spatial variation most likely reflected the preferential foraging of rodents beneath protective vegetation cover. There was no consistent evidence to support the hypothesis that dispersed seeds may escape disproportionately high offspring mortality beneath parent plants resulting from increased herbivore activity. Natural seedling density varied significantly between years and between tree species, according to the abundance of viable seeds produced by conspecific adult trees. Although seedling survivorship varied significantly between species, the survivorship of each species was similar between years and between cohorts of the same year. Canopy cover, field layer cover or correlated factors were significant determinants of seed germination and seedling emergence, establishment and survival, according to age- and species-specific tolerances. In relative terms, patterns of natural regeneration were primarily herbivore- limited (Acer and Taxus), microsite-limited (Betula, Fraxinus, Ilex and Ulmus) or limited by herbivores and microsites (Sorbus). The availability of viable seeds may have also limited the recruitment of Ilex, Sorbus, Taxus and Ulmus. Vegetative expansion, mast seeding, seed bank regeneration and repeated, prolonged reproduction may have reduced the actual impact of herbivory on natural regeneration, such that long-lived iteroparous tree species were unlikely to have been critically dependent on current recruitment.

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De, Villiers Rykie (Rykie Jacoba). "The influence of chemical seed treatment on germination, seedling survival and yield of canola." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50163.

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Thesis (MScAgric)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: The influence of chemical seed treatments on the germination, seedling survival and yield of canola (cv. Varola 44) was investigated in a series of incubation studies, glasshouse experiments, as well as field trials in the canola producing areas in the Western Cape Province. Incubation experiments were conducted to compare germination and seedling growth of untreated (control) seed with that of seed treated at different application rates (0.5, 1.0 and 2.0 times the recommended) of Cruiser® and SA-combination (which consists of Thiulin® at 0.5g a.i.; Apron® at 0.0815 g a.i.; Gaucho® at 0.6125 g a.i. and Rovral® at 0.9975 g a.i.). The results indicated that seed treatment (all rates of SA-combination and highest rate of Cruiser) delayed germination and seedling growth, especially if the seed was subjected to the Accelerated Ageing Test. Glasshouse studies with pasteurised soil at different water contents, seed sources (storage periods) and planting depths confirmed the phytotoxic effects of the chemical seed treatments in the absence of soil borne pathogens. From the results it became clear that extreme water conditions (very wet or dry) increased the suppressing effect on germination and seedling growth, but that no phytotoxic reactions occurred in moist (favourable soil water conditions) soil, regardless of application rate of the chemicals used, planting depth and seed source. In a second glasshouse experiment conducted in moist soil (kept at 50% of field water capacity to prevent any toxic effects) from seven different localities that were naturally infested with pathogens, both chemicals proved to be effective where soil borne pathogens (Rhizocfonia so/ani and Pythium spp.) occurred. No clear trend could however be found due to either chemical or application rates used. Finally, field trials were conducted to study the effect of chemical seed treatments on the plant populations and yield of canola planted in different row widths (17 and 34 cm) and seeding rates (3, 5 and 7 kq.ha'). Results showed that treated seeds produced more plants.rn" and yielded more than untreated seeds at Roodebloem Experimental Farm, while the highest seeding rate produced significantly more plants.rn" (Roodebloem and Langgewens Experimental Farms), but not significantly higher yields than the lowest seeding rate at the same locality. Although row width did not have an effect on plant population, yield (Roodebloem 2003) was significantly less at the wider (34 cm) rows. As in earlier experiments, no consistent differences between the two chemicals used were found. These results clearly illustrated both the negative (in the absence of pathogens) and positive (where soil borne pathogens do occur) effects that chemical seed treatments may have on the germination, seedling growth and even yield of canola under local environmental and soil conditions. Because no significant differences were found between the chemicals used, both chemicals should be regarded as efficient. More research, especially under field conditions and with more cultivars, is needed before the registration of a chemical for seed treatment could be considered.<br>AFRIKAANSE OPSOMMING: Die invloed van chemiese saadbehandeling op die ontkieming, saailing oorlewing en opbrengs van canola (cv. Varola 44) is ondersoek in 'n reeks inkubasie studies, glashuis eksperimente en veldproewe in die canolaproduserende gebiede in die Wes Kaap Provinsie. Inkubasie eksperimente is uitgevoer om die ontkieming en saailing groei van onbehandelde (kontrole) saad te vergelyk met dié van saad wat behandel is teen verskillende dosisse (0.5, 1.0 en 2.0 keer die aanbevole) van Cruiser® en SA-kombinasie (wat bestaan uit Thiulin® teen 0.5g a.i.; Apron® teen 0.0815 g a.i.; Gaucho® teen 0.6125 g a.i. en Rovral® teen 0.9975 g a.i.). Die resultate het aangedui dat saadbehandeling (vir alle dosisse van SAkombinasie en die hoogste dosis van Cruiser) ontkieming en saailing groei vertraag, veral wanneer die saad onderwerp was aan die Versnelde Verouderings Toets. Glashuis studies met gepasteuriseerde grond by verskillende waterinhoude, saad bronne (stoor periodes) en plantdieptes, het die fitotoksiese effekte van die chemiese saadbehandelings bevestig in die afwesigheid van grondgedraagde patogene. Vanuit die resultate het dit duidelik geword dat ekstreme water toestande (baie nat of droog) die onderdrukkende effek op ontkieming en saailinggroei verhoog het, maar dat geen fitotoksiese reaksies plaasgevind het in klam (gunstige grondwater toestande) grond nie, ongeag die dosisse of chemikalieë gebruik, plantdiepte en saad bron. In 'n tweede glashuis eksperiment uitgevoer in klam grond (gehou by 50% van veldwaterkapasiteit om toksiese effekte te voorkom) van sewe lokaliteite wat natuurlik besmet was met patogene, was beide chemikalië effektief waar grondgedraagde patogene (Rhizoctonia so/ani en Pythium spp.) voorgekom het. Geen duidelike tendens is egter waargeneem vir enige van die chemikalieë of dosisse nie. Laastens is veldproewe uitgevoer om die effek van chemiese saadbehandelings op plant populasies en opbrengs te bepaal van canola geplant in verskillende rywydtes (17 en 34 cm) en saaidigthede (3, 5 en 7 kg.ha-1). Resultate het aangedui dat behandelde saad meer plante.rn" produseer en 'n groter opbrengs lewer as onbehandelde saad by Roodebloem Eksperimentele Plaas, terwyl die hoogste saaidigtheid betekenisvol meer plante.m" (Roodebloem en Langgewens Eksperimentele Plase), maar nie betekenisvol hoër opbrengste gelewer het as die laagste saaidigtheid by dieselfde lokaliteit nie. AI het rywydte nie 'n effek op plant populasie gehad nie, was opbrengs (Roodebloem 2003) betekenisvol minder by die wyer (34 cm) rye. Soos in vroeëre eksperimente is geen konsekwente verskille tussen die twee chemikalieë gevind nie. Hierdie resultate illustreer duidelik beide negatiewe (in die afwesigheid van grondgedraagde patogene) en positiewe (in die aanwesigheid van grondgedraagde patogene) effekte wat chemiese saadbehandelings op ontkieming, saailing groei en selfs opbrengs van canola onder plaaslike omgewings en grondtoestande kan hê. Omdat geen betekenisvolle verskille tussen die chemikalieë gevind is nie, moet beide chemikalieë as doeltreffend aanvaar word. Meer navorsing, veralonder veldtoestande en met meer kultivars, is egter nodig voordat die registrasie van 'n chemiese middel vir saadbehandeling oorweeg kan word.

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Lönnberg, Karin. "Effects of seed size and habitat on recruitment patterns in grassland and forest plants." Doctoral thesis, Stockholms universitet, Botaniska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-82384.

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A trade-off between seed size and seed number is central in seed ecology, and has been suggested to be related to a trade-off between competition and colonization, as well as to a trade-off between stress tolerance and fecundity. Large seeds endure hazards during establishment, such as shading, drought, litter coverage and competition from other plants, better than do small seeds, due to a larger amount of stored resources in the seed. Small seeds, however, are numerous and small-seeded species are therefore more fecund. Moreover, a pattern with small-seeded species being associated with open habitats and large-seeded species being associated with closed habitats has been reported in the literature. In this thesis I assess effects of seed size on recruitment, and how relationships between seed size and recruitment may relate to habitat conditions. Seed sowing experiments were performed in the field to assess inter- and intra-specific relationships between seed size and recruitment in open and closed habitats (Paper I and II). Seed removal experiments were performed in the field to assess what effects seed predation may have on a relationship between seed size and recruitment (Paper III). A garden experiment was performed based on contests between larger-seeded and smaller-seeded species, in order to examine different models on co-existence of multiple seed size strategies. The results showed that there was a weak positive relationship between seed size and recruitment in the field, and that this relationship was only weakly and inconclusively related to habitat (Paper I and II). Seed removal was negatively related to seed size in closed habitats and unrelated to seed size in open habitats (Paper III). This indicates that any positive relationship between seed size and recruitment may be an effect of higher seed removal in small-seeded species. However, when grown under controlled conditions in a garden experiment, there was a clear advantage of larger-seeded species over smaller-seeded species (Paper IV). This advantage was unaffected by seed density, indicating that there was no competitive advantage of the larger-seeded species. Instead, indirect evidence suggests that larger-seeded species exhibit higher tolerance to stress.<br><p>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Manuscript. Paper 4: Accepted.</p><p> </p>

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ATHY, ERIN R. "EFFECTS OF MULCH ON TREE SEEDLING SURVIVAL AND EDAPHIC CONDITIONS ON A CLOSED OHIO LANDFILL." Miami University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1070486322.

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Books on the topic "Seedling survival"

1

Tauer, Charles G. Seed source influences juniper seedling survival under severe drought stress. USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1987.

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Hungerford, Roger D. Overstory removal and residue treatments affect soil surface, air, and soil temperature: Implications for seedling survival. U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1987.

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Gary, Fiddler, and Pacific Southwest Research Station, eds. Effect of cattle grazing, seeded grass, and an herbicide on ponderosa pine seedling survival and growth. U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station, 1999.

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McWilliam, S. C. Establishment of oilseed rape: The influence of physical characteristics of seedbeds and weather on germination, emergence and seedling survival. HGCA, 1998.

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Minore, Don. Germination, survival and early growth of conifer seedlings in two habitat types. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986.

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Minore, Don. Germination, survival and early growth of conifer seedlings in two habitat types. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986.

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Minore, Don. Germination, survival and early growth of conifer seedlings in two habitat types. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment 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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Schuler, Thomas M. Residual overstory density affects survival and growth of sheltered oak seedlings on the Allegheny Plateau. United States Dept. of Agriculture, Forest Service, Northeastern Research Station, 2005.

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Book chapters on the topic "Seedling survival"

1

Gutterman, Yitzchak. "Embryo and Seedling Survival and Plant Development." In Adaptations of Desert Organisms. Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-55974-7_7.

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Nautiyal, P. C., K. Sivasubramaniam, and Malavika Dadlani. "Seed Dormancy and Regulation of Germination." In Seed Science and Technology. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-5888-5_3.

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AbstractSeed germination and dormancy are vital components of seed quality; hence, understanding these processes is essential for a sound seed production system. The two processes are closely interrelated and regulated, both by genetic as well as environmental factors. While dormancy provides an inherent mechanism aimed at the survival of the plant species to withstand adverse external conditions by restricting the mature seed from germinating, the ability of the dehydrated seed to remain viable and produce a vigorous seedling upon hydration under favourable conditions is the key to the survival and perpetuation of the plant species. In addition, quality seed is expected to result in timely and uniform germination under favourable field conditions after sowing to establish a healthy crop stand. Therefore, in seed technology, dormancy is not considered a desirable trait in the seed lots used for sowing. Thus, to achieve the highest germination percentage, understanding the factors controlling these two interlinked and contrasting processes is vital. In seed testing and seed trade, knowledge of seed germination and dormancy is needed for a reliable assessment of seed quality and its planting value, and to make right decisions. Though much is yet to be understood, the present status of knowledge on these aspects has made significant advances, especially in genetic control, molecular mechanism, and physiological and environmental factors influencing germination and dormancy. The information compiled in this chapter may help the seed technologists in developing new methods for breaking dormancy and testing germination,

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Gutterman, Yitzchak. "Germination, the Survival of Seedlings and Competition." In Seed Germination in Desert Plants. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-75698-6_6.

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Tabari, Masoud, Javad Mirzaei, and Hadi Daroodi. "Early Growth of Quercus castaneifolia (C.A. Meyer) Seedlings as Affected by Weeding, Shading and Irrigation." In Survival and Sustainability. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-95991-5_8.

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Lowther, W. L., J. H. Hoglund, and M. J. Macfarlane. "Aspects that Limit the Survival of Legume Seedlings." In Persistence of Forage Legumes. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/1989.persistenceofforagelegumes.c19.

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Kowalkowski, Alojzy. "Survival Rate of Tree and Shrub Seedlings Under Extreme Environmental Nitrogen Pollution." In Management of Nutrition in Forests under Stress. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3252-7_4.

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Santeramo, F. G., T. Balezentis, and M. Tappi. "Weather and Yield Index-Based Insurance Schemes in the EU Agriculture: A Focus on the Agri-CAT Fund." In Springer Actuarial. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-80574-5_3.

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Abstract Agriculture is the most vulnerable sector to climate change, e.g., temperatures or rainfall may significantly affect the crop yields, also leading the proliferation of pathogens and hence pests and diseases [1]. The total economic losses from weather- and climate-related have caused damages reaching nearly 487 billion of euros in EEA member countries since 1980, and just 3% of all events are responsible for 60% of economic losses [2]. Extreme weather events such as heavy precipitation, flood, drought, frost, heat, and strong wind are more and more frequent, intense, long-lasting, and they are the major drivers of agricultural losses [3, 4]. Heavy precipitation may reduce photosynthetically active radiation up to irreversible tissue damages, setting the conditions for diseases due to the proliferation of pathogens, nutrient leaching, soil erosion, and oxygen deficit [5, 6], also inducing flash flood events, in combination with other factors as the antecedent soil moisture [7, 8]. Drought and water shortage may affect the metabolism of plants with changes in root growth and architecture, and other tissue-specific responses that modify the flux of cellular signals [9]. The stress due to drought events is the main factor limiting the development of crop and its productivity [10]. Cold may damage the leaf and seedling survival, also leading to the sterility and the abortion of formed grains, especially for the cereal crops [11]. Heat directly affects the crop physiology, reducing photosynthesis rates, leading the acceleration of leaf senescence processes, oxidative damages, and pollen sterility [12]. Strong wind may also be very impactful (i.e., abrasions on the leaves and fruits, defoliations, water loss, desiccation, loss of flowers and poor fruit set), although the plants can change the structure and properties of cells and tissues, re-configuring their canopies as a defensive response [13]. On-farm and risk-sharing strategies are available to improve the resilience of farming systems to weather risks. The former includes risk control (i.e., risk prevention such as irrigation, shading, pest control, improved planning and monitoring activities), reserves (i.e., stocking, financial savings, additional labour input), and diversification (i.e., agricultural and structural diversification as nature conservation or agrotourism, off-farm allocation of resources); the latter includes risk pooling (i.e., mutual funds, agricultural insurance, membership in cooperatives, credit unions, producer organizations), and risk transfer (i.e., forwards, futures contracts) [14]. Member States may grant support for risk management tools (e.g., financial contribution to insurance premiums and to mutual funds) which can help farmers to manage production and income risks related to their agricultural activity and over which they have no control [15]. The new Common Agricultural Policy (CAP) reform is putting increasing emphasis on instrument supporting proactive management of the effects of extreme weather events due to climate change [15]. We provide an overview of the spread of risk management tools subsidised by new CAP 2023–2027, focusing on two promising tools: the weather index-based insurance and the Agri-CAT fund. We also discuss on their feasibility at farm-level, highlighting pros and cons, also animating the debate on how policymakers may improve the attractiveness of risk management tools.

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Pandit, Bishnu Hari, Netra Kumari Aryal, and Hans-Peter Schmidt. "Social-Ecological Transformation Through Planting Mixed Tree Species on Abandoned Agricultural Land in the Hills of Nepal." In Fostering Transformative Change for Sustainability in the Context of Socio-Ecological Production Landscapes and Seascapes (SEPLS). Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6761-6_5.

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AbstractA project entitled, “Building village economies through climate farming & forest gardening” (BeChange) was implemented in four municipality areas of the Tanahun and Lamjung districts of Nepal from May 2015. In order to assess changes in the social-ecological system that result from this project targeting abandoned agricultural lands, this case study was conducted using various methods: triad grouping, GPS point surveys, household surveys, focus group discussions (FGDs), field observation and reports. A participatory approach in reforestation on abandoned agricultural land with introduction of carbon credits has become a new livelihood strategy for local communities. It has not only attracted domestic and international tourists, but also helped to conserve biodiversity and local ecology. This activity also united village women and indigenous communities as triad groups for collaborative outcomes. A total of 42,138 seedlings of mixed tree species such as Michelia champaca, Elaeocarpus ganitrus, Bassia butyraceae, Bauhinia purpurea, and Cinnamon tamala were planted by 276 families on abandoned agricultural land between May 2015 and July 2018. However, as of 2020, this range has expanded to include 635 families with plantations of more than 65,000 seedlings. The set-up and maintenance of these forest gardens were financed with advanced payments for the carbon sink services of the planted trees. Farmers who succeeded with tree survival rates above 80% received an additional yearly carbon sink payment. The outcomes of the project show significant improvements in food security and tree biodiversity in the project villages. Of the total sampled households, almost half (45%) were under extreme poverty and had food sufficiency for only 3 months/year before the project. With the project, this percentage dropped to 22%, signals the emergence of seeds for transformative change.

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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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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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Conference papers on the topic "Seedling survival"

1

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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van Wyk, Stefanus Johannes, and Leon van Rensburg. "The Effect of the Dispersive Nature of Tailings on Seedling Establishment and Survival." In First International Seminar on Mine Closure. Australian Centre for Geomechanics, Perth, 2006. http://dx.doi.org/10.36487/acg_repo/605_32.

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Рыбаков, К. В., В. Г. Краснов, and М. И. Смышляева. "SURVIVAL ABILITY AND GROWTH OF EXPERIMENTAL ENGLISH OAK (QUERCUS ROBUR L.) COMPOSED OF SEEDLINGS WITH CLOSED ROOT SYSTEM GROWN IN DIFFERENT NUTRITIOUS SUBSTRATES." In Лесные экосистемы в условиях изменения климата: биологическая продуктивность и дистанционный мониторинг. Crossref, 2019. http://dx.doi.org/10.25686/2683.2019.5.58819.

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В статье представлен опыт создания опытных культур дуба черешчатого с использованием сеянцев с закрытой корневой системой (ЗКС), выращенных на различных питательных субстратах на территории питомника лесных и декоративных древесных растений Азяково Ботанического сада-института Поволжского государственного технологического университета. Цель исследования выявить оптимальный вид субстрата при выращивании сеянцев дуба черешчатого с закрытой корневой системой для последующего эффективного создания лесных культур, соответствующего по экономическим и качественным требованиям производимых сеянцев данной породы в условиях зоны хвойно-широколиственных лесов Среднего Поволжья. Приведены характеристики: агрохимических свойств субстратов, грунтовой всхожести желудей дуба черешчатого, устойчивости корнезакрывающего кома субстрата, массы сухого вещества основных фракций сеянцев дуба, а также биометрические показатели сеянцев в зависимости от используемого при выращивании вида субстрата. Исследование включало проведение инвентаризации опытных объектов, которую проводили в октябре 2016 и 2017 гг., полученные данные были обработаны с использованием методов математической статистики. В результате определено, что по показателям приживаемости данные достоверно отличаются по вариантам опыта F расч. F табл. (7,14 2,51), доля влияния фактора 75,93 . Была произведена оценка вариантов опыта по комплексу показателей имеющие влияние на рост дуба в теплице и в лесных культурах. Определены оптимальные варианты субстрата 3 и 8. Выявлена зависимость приживаемости растений и плотности сложения субстрата в вариантах опыта. Оптимальная плотность сложения находится в пределах от 0,4-0,6 г/см3 . Также выявлена зависимость кислотности почвенного раствора субстрата и приживаемости растений в лесных культурах. Оптимальный уровень кислотности используемых субстратов от 5,0-6,5. This paper presents the approach to establishing experimental plantations of English oak from seedlings with a closed root system grown on various nutrient substrates on the territory of the nursery of forest and decorative woody plants Azyakovo of Volgatech Botanical Garden-Institute. The research aims to identify the optimal type of substrate for growing the seedlings of English oak with a closed root system for the effective establishment of forest plantations that meet economic and quality requirements to these types of seedlings on the territory of coniferous-broad-leaved forests of the Middle Volga Region. The paper analyses agrochemical properties of substrates, germination of acorns, stability of root-closing balls, dry weight of the main fractions of oak seedlings, and their biometric indicators depending on the type of substrate used. The research involved the inventory of experimental objects, which was carried out in October 2016 and 2017. The data obtained were processed using mathematical statistics methods. The research revealed that the data differ significantly in terms of survival rates for F calculated value F table value (7.14 2.51), the influence of the factor is 75.93. A set of indicators that impact the growth of oak in green- 82 houses and on forest plantations have been assessed. The optimal substrate compositions have been determined - No. 3 and No. 8. The dependence of plant survival rate on the density of substrate composition in the variants under study have been determined. The optimal substrate composition density varies in the range between 0.4 g/cm3 and 0.6 g/cm3 . The correlation between the substrate acidity and seedling survival rate on forest plantations has also been revealed. The optimal acidity level of the substrates used varies from 5.0 to 6.5.

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Kan, Haiming, Juying Wu, Tiejun Sun, Guixia Liu, and Zhuo Pang. "The Effects of Gap Disturbance on the Seedling Emergence, Survival and Growth of Two Different Native Species in Inner Mongolia." In 2016 International Forum on Energy, Environment and Sustainable Development. Atlantis Press, 2016. http://dx.doi.org/10.2991/ifeesd-16.2016.174.

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Temel, Fatih. "Assisted Migration of Pinus brutia in Türkiye: A Potential Tool for Sustaining Growth in the Face of Climate Change." In 3rd International Congress on Engineering and Life Science. Prensip Publishing, 2023. http://dx.doi.org/10.61326/icelis.2023.34.

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Forest tree populations deal with climate change either by increasing frequency of alleles contributing to adaptation to new conditions through natural selection or by migrating to places where they can establish and survive. In order for either mechanism to work, changes in allele frequencies or rate of migration should be able to keep up with the rate of climatic changes. For most forest tree populations, however, rate of climate change is faster than their genetic adaptation or migration rates. One potential solution to this problem is human assisted migration of forest tree species and involves moving forest tree species or seed sources of a forest tree species into areas where they would be better adapted to future climatic conditions than the local species or seed source. Pinus brutia is the most important forest tree species in Türkiye, covering 5.1 million ha (23% of total forests), and accounting for 9.3 million m3 (34%) of annual timber production. Over 50 million P. brutia seedlings are produced annually (~20% of total forest tree seedling production). Current seed transfer is based on the country’s six current seed zones, developed in the absence of provenance test data, are based on relative humidity during the vegetation period, and are partitioned into two to six sub-zones within each main zone (22 in total) on the basis of the length of vegetation period. Most of the P. brutia range in Türkiye is located in places where the effects of climate change are prominent. In 1988, a comprehensive provenance testing program was initiated where 50 P. brutia populations from Türkiye and Northern Cyprus were tested on 26 sites in Türkiye and Northern Cyprus. Trees in these tests were measured for survival, growth and form at ages three, five, 10 and 20. We used population mean growth data from these provenance tests to develop transfer functions from which safe seed transfer distances were calculated. On average, DBH at age 20 (DBH20) had the strongest relationship with the transfer distances. For each site, growth relative to local population was calculated and plotted across all climatic transfer distances for all sites. Transfer distances for summer precipitation (PPT_sm), mean warmest month temperature (MWMT) and annual heat moisture index (AHM) were found to have significant relationship with DBH20. P. brutia seed sources can be transferred within 105 mm PPT_sm, 10 °C MWMT and 36 units AHM without sacrificing volume growth more than 5% compared to that of local seed source. Provenance test data can be used to determine suitable seed sources for a given plantation site for different future climatic condition scenarios. This approach can help sustaining growth in P. brutia plantations in the face of climate change.

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Konstantinovich, A. V., A. S. Kuracheva, and E. D. Binkevich. "Improvement of separate elements of the techno-logy of cultivation of white cabbage in the conditions of the of the central region of the non-chernozem zone." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-145.

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In conditions of climate change, when temperature and precipitation fluctuations occur more and more frequently during the growing season, it is necessary to obtain high quality seedlings with "immunity" to various stress factors, including high weediness, the damage from which is associated with a decrease in yield (by 25 -35%) and with a deterioration in the quality of agricultural products. Due to the imbalance in production technology, seedlings are often weakened, overgrown, with a low yield per unit area and survival rate in the field. One of the solutions to this problem is the use of PP for pre-sowing seed treatment to increase the competitiveness of seedlings in the field.

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CHukarina, A. V. "Growing seedlings of common apricot using biologically active substances in the steppe zone." In SCIENCE OF RUSSIA: GOALS AND OBJECTIVES. L-Journal, 2020. http://dx.doi.org/10.18411/sr-10-12-2020-44.

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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.

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Скорейко, А., Татьяна Андрийчук та Р. Билык. "Влияние биопрепаратов на приживаемость и продуктивность растений in vitro". У International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.58.

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The results of studies of the influence of biologicals on the process of adaptation of microclonal potato plants to in vivo conditions in greenhouse and field conditions are presented. Treatment of plant material with biological products Planriz and PhytoDoctor promotes the adaptation of in vitro potato plants to in vivo conditions, increases the survival rate of up to 97,8% of potato seedlings and increases the yield of mini-tubers.

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Zdioruk, Nina, Nicolai Platovschii, and Tudor Ralea. "Biological aspects of the methodology for obtaining Quercus robur l." In Scientific International Symposium “Advanced Biotechnologies - Achievements and Prospects” (VIth Edition). Institute of Genetics, Physiology and Plant Protection, 2022. http://dx.doi.org/10.53040/abap6.2022.82.

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Due to the increase in the average annual temperature and the increased frequency of forest ﬁres leading to the death of forest plantations, our institute has developed a new method for obtaining oak seedlings characterized by high growth and development rates. Seedlings obtained by the new method are characterized by high growth and development energy accor-ding to such indicators as average annual growth, plant height, stem diameter and leaf surface index. Oak seedlings obtained by the method developed by us can be used in the repair of forest plantations with a high degree of survival and growth rate. Against the backdrop of recent years, the temperature regime on the globe is steadily growing, accompanied by serious consequences for the environment. Every year, forest ﬁres occur in various parts of the world, caused by both weather disasters and human activity, as a result of which very signiﬁcant areas of forest plantations are lost. Forest ﬁres lead to severe damage, and sometimes to the destruction of forest cover, which aﬀects the atmosphere, soil, hydrosphere, and fauna, it is also worth noting signiﬁcant losses for human resources [2]. I would especially like to emphasize that, along with forest ﬁres, signiﬁcant harm is caused by human activities associated with deforestation, many of which are perennial plantations. For the European part of the mainland, one of the most valuable forest species is oak, which is listed in the Red Book of the International Union for Conservation of Nature and is valuable for its wood [1]. Oak plantations are characterized as long-lived massifs, however, the intensity of their growth is extremely low and it takes about 150-200 years to obtain plantations up to 20 m in height, which is an extremely long period [3].

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Reports on the topic "Seedling survival"

1

McDonald, Philip M., and Gary O. Fiddler. Effect of cattle grazing, seeded grass, and an herbicide on ponderosa pine seedling survival and growth. U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, 1999. http://dx.doi.org/10.2737/psw-rp-242.

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2

Hall, Derek B., Val Jo Anderson, and Stephen B. Monsen. Competitive effects of bluebunch wheatgrass, crested wheatgrass, and cheatgrass on antelope bitterbrush seedling emergence and survival. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 1999. http://dx.doi.org/10.2737/rmrs-rp-16.

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3

Hungerford, Roger D., and Ronald E. Babbitt. Overstory removal and residue treatments affect soil surface, air, and soil temperature: implications for seedling survival. U.S. Department of Agriculture, Forest Service, Intermountain Research Station, 1987. http://dx.doi.org/10.2737/int-rp-377.

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4

Rundel, Philip W., Barry A. Prigge, and M. R. Sharifi. The Effect of Amount and Frequency of Precipitation on Seedling Establishment and Survival of Lane Mountain Milkvetch (Astragalus jaegerianus Munz). Defense Technical Information Center, 2007. http://dx.doi.org/10.21236/ada482352.

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5

Israel, Alvaro, and John Merrill. Production of Seed Stocks for Sustainable Tank Cultivation of the Red Edible Seaweed Porphyra. United States Department of Agriculture, 2006. http://dx.doi.org/10.32747/2006.7696527.bard.

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Porphyra species (commonly known as ‘nori’ or ‘purple laver’) are edible red seaweeds rich in proteins, vitamins and other highly valued biogenic compounds. For years Porphyra has been cultured using seeded nets extended in the open sea, and its biomass consumed primarily in the Far East. While demands for international markets have increased steadily at an average of 20% per year, supplies are on the verge and not expected to meet future demands. Alternatively, land-based cultivation of seaweed has become attractive in the mariculture industry since (1) important growth parameters can be controlled, (2) is environmentally friendly and (3) perfectly matches with integrated aquaculture leading to sustainable, high quality products. During the last few years a tank cultivation technology for Porphyra has been developed at the Israeli institution. This technology is based on indoor production of asexual spores and their subsequent growth to 1-2 mm seedlings. The seedlings are then transferred to outdoor tanks and ponds when seawater temperatures drop to 20 °C, or below, and days become shorter during winter time. However, the current technology efficiently serves only about 100 m2 of ponds during one growth season. In order to produce seedlings in sufficient amounts, it is critical to address both technical and biological aspects of seedling production, securing optimal up-scale to commercial-size cultivation farms. We hypothesize that massive production of spores is related to thalli origin, thalli age and sporulation triggers, and that seedling survival and their subsequent growth potential is determined by the seawater quality and overall indoor growth conditions imposed. A series of bio-reactors were constructed and tested in which spore release and spore growth were separately studied. The main assessment criteria for optimal viability of the seedlings will be by determining their electron transport rate using PAM fluorometry and by subsequent growth and biomass yields in outdoor ponds. Altogether the project showed (1), controlled sporulation is possible in big outdoor/growth chamber settings provided initial stock material (small frozen seedlings) is at hand, (2), contamination problems can be almost completely avoided if stock material is properly handled (clean as possible and partially dehydrated prior to freezing), (3), spore release can significantly be enhance using high nutrient levels during thawing for P. yezoensis and P. haitanensis, but not for P. rosengurttii, (4), PAM fluorometry is an efficient tool to estimate growth capacity in both seedlings and juvenile thalli. The BARD funding also served to explore other aspects of Porphyra biology and cultivation. For example, the taxonomical status of Porphyra strains used in this study was defined (see appendix), and the potential use of this seaweed in bioremediation was well substantiated. In addition, BARD funding supported a number of opportunities and activities in the Israeli lab, direct or indirectly related to the initial objectives of the project such as: additional molecular work in other seaweeds, description of at least 2 new species for the Israeli Mediterranean, and continuous support for the writing of a book on Global Change and applied aspects of seaweeds. The technology for Porphyra cultivation in land-based ponds is readily available. This study corroborated previous know-how of Porphyra growth in tanks and ponds, and yet offers important improvements regarding seedling production and their handling for successful cultivation. This study supported various other activities opening additional important issues in the biology/cultivation/use of Porphyra and other seaweeds.

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6

Kern, R. A. A comparative field study of growth and survival of Sierran conifer seedlings. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/555436.

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7

Minore, Don. Germination, survival and early growth of conifer seedlings in two habitat types. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1986. http://dx.doi.org/10.2737/pnw-rp-348.

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8

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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9

Nelson, E., and V. Rogers. Survival of planted tupelo seedlings in F- and H-Area tree-kill zones. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/67714.

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10

Schuler, Thomas M., Patrick Brose, Robert L. White, and Robert L. White. Residual overstory density affects survival and growth of sheltered oak seedlings on the Allegheny Plateau. U.S. Department of Agriculture, Forest Service, Northeastern Research Station, 2005. http://dx.doi.org/10.2737/ne-rp-728.

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