Results 211 to 220 of about 10,721 (255)
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Canadian Journal of Soil Science, 1995
Approaches used to study seed banks and early publications on them are summarized. Current areas of interest are described, including the balance between herbicide-susceptible and herbicide-resistant seed populations, the effects of reduced tillage, the genetic structure of the seed bank, the role of desiccation, the impact of nutrients, oxygen and ...
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Approaches used to study seed banks and early publications on them are summarized. Current areas of interest are described, including the balance between herbicide-susceptible and herbicide-resistant seed populations, the effects of reduced tillage, the genetic structure of the seed bank, the role of desiccation, the impact of nutrients, oxygen and ...
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Spatial Pattern Analysis of Weed Seeds in the Cultivated Soil Seed Bank
The Journal of Applied Ecology, 1991(1) Spatial pattern of weeds was analysed in an arable-soil seed bank after winter barley. Three hundred samples were taken in a 7-5 x 10m area. Three indices of dispersion (variance-to-mean ratio, Lloyd's mean crowding and Lloyd's patchiness) and the Moran's I statistic of spatial autocorrelation were calculated.
Dessaint, Fabrice +2 more
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1985
After dispersal most seeds undergo a period of dormancy. Depending on the species and the prevailing conditions, dormancy may last from a few days to many decades (or longer). In some species it is normal for a proportion of the seeds to become incorporated into the soil and become part of a store or ‘bank’ of seeds which can be drawn upon ...
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After dispersal most seeds undergo a period of dormancy. Depending on the species and the prevailing conditions, dormancy may last from a few days to many decades (or longer). In some species it is normal for a proportion of the seeds to become incorporated into the soil and become part of a store or ‘bank’ of seeds which can be drawn upon ...
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The fate of seeds in Mediterranean soil seed banks in relation to their traits
Journal of Vegetation Science, 2006AbstractQuestion:Is there any change in seed density and species richness in Mediterranean surface soil banks during summer? Are there any relationships between these summer variations and seed traits (weight, length and shape), without and with controlling the phylogenetic effect?Location:Central Spain.Methods:Samples of the surface soil seed bank ...
Juan Traba +2 more
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The chemical environment in the soil seed bank.
2013This chapter discusses the effects of soil chemicals on seed dormancy and germination, and on seed bank dynamics. The occurrence, signal translation, and mechanisms of action are discussed for some of the most important chemical cues (nitrate, allelochemicals, allelochemical inhibitors and promoters, gaseous compounds, smoke-derived chemicals, oxygen ...
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Comparisons of soil seed bank classification systems
Seed Science Research, 2003AbstractSince 1969, ten soil seed bank classification systems have been published. Among these systems, the number of recognized seed bank categories varies from three to twelve. Seed longevity is the main factor used for distinguishing categories, but dormancy and germination types are also important.
Péter Csontos, Júlia Tamás
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Organisation of the soil seed bank in mixed chaparral
Vegetatio, 1994Seed densities, estimated from germinations under glasshouse conditions, were determined for fire-treated and control soils sampled from north and south facing stands of mixedAdenostoma fasciculatum-Ceanothus greggii chaparral that last burned 10, 17, 36, 62 and 86 years before 1987. A total of 53 species was recorded. Total germinable seed density was
C. Zammit, P. H. Zedler
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The functional role of the soil seed bank in agricultural ecosystems.
2013This chapter focuses on the importance of the soil seed bank in plant regeneration in agricultural fields, and on the interaction between relevant biophysical processes (seed mortality, dormancy and germination, and pre-emergent seedling mortality) and agricultural practices (the choice of a crop species and its frequency in the rotation, tillage, and ...
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[Dynamics of seed rain of Tripterygium hypoglaucum and soil seed bank].
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2019Tripterygium hypoglaucum is an endangered species in arid areas of Xiannvshan Chongqing, China. The dynamic characteristics of seed rain and soil seed bank of T. hypoglaucum were studied in this paper．Results showed that T. hypoglaucum years of mature seeds distribution number up to October; the seed rain occurred from the last ten-day of September to ...
Zhi-Wei, Zhang +5 more
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