نتایج جستجو برای: agropyron desertorum و agelongatum
تعداد نتایج: 761013 فیلتر نتایج به سال:
Two species of Agropyron grass differed strikingly in their capacity to compete for phosphate in soil interspaces shared with a common competitor, the sagebrush Artemisia tridentata. Of the total phosphorus-32 and -33 absorbed by Artemisia, 86 percent was from the interspace shared with Agropyron spicatum and only 14 percent from that shared with Agropyron desertorum. Actively absorbing mycorrh...
The genomes of five Agropyron Gaertner, 1770 species were characterized using all potential di- or trinucleotide simple sequence repeat (SSR) motifs and four satellite DNA repeats as fluorescence in situ hybridization (FISH) probes. The sites of 5S and 45S rDNA were relatively conserved among the diploid and tetraploid species. A number of sites for the dinucleotide SSRs AC, AG, and pSc119.2 wa...
گونۀ مرتعیAgropyron desertorum از مهمترین گراسهای چندسالۀ نواحی نیمه خشک و معتدل بوده که به منظور تهیۀ علوفه، ایجاد چراگاه، تثبیت خاکها و مـدیریت منـابع آبی توسط کارشناسان منابع طبیعی توصیه میشود. آگاهی از تغییرات عملکرد گونههای مرتعی در شرایط متفاوت محیطی از ضروریات اصلاح، احیاء و مدیریت اکوسیستمهای مرتعی است. هدف از این تحقیق بررسی تأثیرات متقابل عوامل محیطی خشکی و آلودگی بر عملکرد گونۀ...
The research presents the problem of liquidation dumps substandard raw materials zeolite-containing rocks Holinsky deposit, measures for reclamation disturbed lands. most effective way to restore ecosystems is renaturation. Time intervals succession are considered. Renaturation lands consists 6 stages. Possible dominant plants proposed options considered in detail: Stipa lessingiana, Poa platen...
Magnesium Concentration in Agropyron desertorum Fertilized with Mg and 1st H. F. Mayland and D. L. Grunes2 of humid pastures with N and K often increases the i id of tetany 3 4 nc ence ( , 4). Grass tetany, a Mg deficiency in ruminants, is responsible for large economic losses throughout temperate regions. Significant livestock losses occur in the semiarid western United States primarily when l...
این تحقیق به منظور بررسی تأثیر سطوح مختلف شوری بر خصوصیات مورفولوژیکی، رویشی و فیزیولوژیکی سه گونه مرتعی ag. elongatum، agropyron desertorum و hordeum fragilis در گلخانه ی مزرعه فدک قم انجام شد. طرح به صورت فاکتوریل شامل سه گونه مرتعی به عنوان فاکتور اول و پنج سطح شوری صفر (شاهد)، 50، 100، 150 و 200 میلی مولار کلرور سدیم به عنوان فاکتور دوم و با طرح پایه کاملاً تصادفی در 3 تکرار اجرا گردید. طول...
three grass species, agropyron desertorum (agde) and agropyron elongatum (agel) and recently, bromus tomentellus (brto) are mainly used for range improvement as mixed seeding in semi-arid areas of iran. because there is little information about management of these grasses, this study was conducted at the sisab research station in northern iran to evaluate their responses to grazing management a...
considering forage grass species, germination is one of the important stagesconcerning the growing stage that is often influenced by environmental stresses,particularly salinity and drought stresses. thus, this study aims to assess the effects ofsalinity and drought stresses on germination characteristics and seedling growth of desertwheatgrass, agropyron desertorum (fisch. ex link) schult. in ...
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