نتایج جستجو برای: agropyron pectiniforme
تعداد نتایج: 652 فیلتر نتایج به سال:
Management and control of poisonous and allelopathic plant species are from the main priorities for restoration of range and desert ecosystems. In a glasshouse experiment, seeds of Agropyron desertorum, a perennial forage grass, were sown within the soil media containing different proportion of shoots (0, 5% and 20%) and root powder, or soil taken from the under canopy of harmal plant. Experime...
Degradation of plant patches is considered as one of the indices for rangeland degrading health condition. Investigating the accuracy of triple indices (infiltration, stability and soil nutrient cycle) presented by LFA method seems necessary to determine its efficiency in semi-arid areas with the least cost. This study aims to investigate the role of vegetative species and growing forms on soil...
هـدف از این تحقیق مقایسه عناصر n, p, kدر خاک پای سه گونه مرتعی taui agropyron ،astragalus ammodendron و tomentellusbromus و خاک منطقه شاهد است. به نحویکه پس از شناسایی رویشگاههای این سه گونه در منطقه شازند اراک، در انتهای فصل رویش (تابستان 1386) نمونهبرداری در مناطق معرف هر رویشگاه به روش تصادفی سیستماتیک از خاک انجام شد. به طوریکه برای بررسی ویژگیهای مورد مطالعه در هرگونه در امتداد 4 تر...
genetic variations within the species of agropyron desertorum and 2 varieties of a. cristatum subsp. pectinatum var. imbricatum and a. cristatum subsp. pectinatum var. pectinatum were studied using morphological traits and total protein profiles (with sodium dodecylsulphate polyacrylamide gel electrophoresis). an experiment was conducted in research institute of forests and rangelands (2012-201...
1. Biological invasion can permanently alter ecosystem structure and function. Invasive species are difficult to eradicate, so methods for constraining invasions would be ecologically valuable. We examined the potential of ecological restoration to constrain invasion of an old field by Agropyron cristatum , an introduced C 3 grass. 2. A field experiment was conducted in the northern Great Plain...
Other common name(s): couchgrass, wheatgrass diet, agropyron Scientific/medical name(s): Raphanus sativus. The common name "radish" is derived from Latin radix (root). Description The radish is an edible root vegetable of the Brassicaceae family that was domesticated in Europe in pre-Roman times. Radishes have numerous varieties, varying in size, color and duration of required cultivation time...
Native grasses interact spatially with themselves and their environment and can therefore be thought of as a system of dependent random variables. One method of modeling the spatial dependence of a multi-species population is a Gibbsian pairwise potential model. Since natural selection operates at the level of individual plants, the information obtained from such a model should provide a greate...
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