نتایج جستجو برای: stipa hohenackeriana

تعداد نتایج: 521  

ژورنال: :تحقیقات مرتع و بیابان ایران 2013
جلال عبداللهی حسین نادری محمدرضا میرجلیلی منیرالسادات طباطبایی زاده

شناخت رفتار و عمل گونه­های گیاهی و ارتباط اکولوژیکی آنها با متغیرهای محیطی به­عنوان قسمت مهمی از اطلاعات مورد نیاز در برنامه­های اصلاح، احیاء و بهره­برداری صحیح از مراتع، ضروری و اساسی است. در این تحقیق اثر عوامل محیطی بر خصوصیات کمی رشد گونه استیپا (stipa barbata) در منطقه ندوشن استان یزد، با استفاده از روش رسته­بندی بررسی شد. به این منظور با استفاده از نقشه پوشش گیاهی منطقه و بازدید­های میدان...

2015
Dongli Wan Yongqing Wan Xiangyang Hou Weibo Ren Yong Ding Rula Sa

BACKGROUND Stipa grandis (Poaceae) is one of the dominant species in a typical steppe of the Inner Mongolian Plateau. However, primarily due to heavy grazing, the grasslands have become seriously degraded, and S. grandis has developed a special growth-inhibition phenotype against the stressful habitat. Because of the lack of transcriptomic and genomic information, the understanding of the molec...

Journal: :The Journal of allergy and clinical immunology 1996
M Hinojosa J Fraj B De la Hoz R Alcazar A Sueiro

Esparto grass (Stipa tenacissima), which is commonly found in the Mediterranean countries, has a wide variety of uses. Five stucco makers who had cough, dyspnea, malaise, and fever after exposure to esparto fiber used in their jobs showed a significant decrease in symptoms when they were away from work. Precipitating antibodies against an esparto extract were found in the sera of all patients. ...

1994
T. Gauquelin G. Jalut M. Iglesias F. Valle F. Fromard

Above-ground perennial phytomass of Andalusian alfa grass steppes (7755·6 ± 1482 kg of dry matter ha (95% C.I.)) is clearly higher than phytomass density measured today in most alfa grass communities of the Maghreb because of low or inexistant present-day human-induced alterations and relatively favourable annual precipitation (370 mm) existing in these Spanish steppes. Total carbon storage mea...

ژورنال: مرتع 2023

Background and objectives: Satellite images and remote sensing technology are recognized as efficient and modern tools for extracting information related to earth sciences, which make it possible to evaluate and monitor ecosystems at a lower cost than field methods. One of the most important methods of extracting information from satellite data is various image classification techniques. The pr...

Journal: :مرتع و آبخیزداری 0
محمد فیاض عضو هیات علمی موسسه تحقیقات جنگل‏ها و مراتع کشور، ایران

more than half of the area of the country are rangelands. implementing the principles of proper rangeland management and optimal use of rangeland requires proper stock grazing management. considering the quality and quantity of forage plants, palatability and preference value of species and rates of species utilization are information needed for proper management of livestock grazing in rangela...

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