نتایج جستجو برای: rangeland condition

تعداد نتایج: 317319  

2005

Humans have exerted large-scale changes on the terrestrial biosphere, primarily through agriculture; however, the impacts of such changes on the hydrologic cycle are poorly understood. The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater r...

Journal: Desert 2008
M. Jankju-Borzelabad M. Taghi Zare N. Baghestani-Maybodi

One of the key factors in managing a rangeland is to determine the relative preference of its major plant species by thegrazing livestock. Preference value of each plant species is affected by plant type, companion plants, availability byanimals, phenological stage, climate condition, and the livestock species. We investigated the grazing behaviour of anative goat (Garizi) in the steppe rangela...

Journal: :مرتع و آبخیزداری 0
ابراهیم گویلی کارشناس ارشد مرتعداری، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران محمدرضا وهابی استادیار دانشکده منابع طبیعی دانشگاه صنعتی اصفهان، ایران فاضل امیری عضو هیأت علمی دانشگاه آزاد اسلامی واحد بوشهر، ایران شیوا رشیدی دانشجوی کارشناسی ارشد جنگل شناسی، دانشکده منابع طبیعی، دانشگاه کردستان، ایران

for planning the grazing of rangeland according to difference in body weight and different energy requirements should determine forage requirement of animal unit. in the other hand, daily need of animal in rangeland depends on the quantity and quality of intake forage composition. for this purpose selected part of the rangeland of fereidunshahr in isfahan province was classified to vegetation t...

Journal: :پژوهش های روستایی 0
علی اکبر کریمیان استادیار گروه مرتع و آبخیزداری، دانشکده منابع طبیعی، دانشگاه یزد

introduction ownership is an important element for sustainability development in natural resource management. rangelands vegetations are important factor for produce in traditional herding therefore recognition of different utilization methods and management of this vegetation resource production for animal grazing and rangelands condition is very important. so this research carried out in 2009...

2011
SAMUEL D. FUHLENDORF DAVID M. ENGLE

Rangelands are the most common form of terrain WE PROPOSE A PARADIGM THAT in both the United States (where it accounts for 61% of all land surface) and the world (70% of all land surface). ENHANCES HETEROGENEITY Rangelands consist primarily of native plant communities managed, typically, for livestock production (Holechek et al. INSTEAD OF HOMOGENEITY TO PROMOTE 1998). Because they can embrace ...

2001
W. Tao

Land desertification is one of the most serious environmental and social-economic problems in the North China. The processes of desertification mainly have being controlled by the interaction of human activities and fragile eco-environment, that means the pattern and intension of landuse are major factors for development or reverse of desertification. Because of the increasing pressure of popul...

Journal: :Journal of environmental management 2013
Richard Teague Fred Provenza Urs Kreuter Tim Steffens Matt Barnes

Maintaining or enhancing the productive capacity and resilience of rangeland ecosystems is critical for the continued support of people who depend on them for their livelihoods, especially in the face of climatic change. This is also necessary for the continued delivery of ecosystem services derived from rangelands for the broader benefit of societies around the world. Multi-paddock grazing man...

Today, there are many factors affecting watersheds, consequently changing natural ecosystems succession. The aim of this study was to investigate the effect of drought events on land use changes at Doiraj Watershed of Ilam Province from 1996 to 2015. For this purpose, Landsat satellite images were used for land use change monitoring and Standardized Precipitation Index (SPI) was applied for dro...

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