نتایج جستجو برای: rangeland shrubs

تعداد نتایج: 6542  

2017
Ru An Hui-Lin Wang Xue-Zhi Feng Zhe Wang Ying Wang Ying-Hui Zhao

the “Three-River Headwaters” region (TRHR) rangeland ecosystem is extremely sensitive and fragile, and in recent years has undergone continuous degradation. The vast area and severe nature conditions inhibit data acquisition and field experiments, resulting in different understandings about the spatial characteristics and dynamics of rangeland degradation in the region. Therefore, reliable moni...

Journal: :Sustainability 2021

An approach is proposed in the present study to estimate soil erosion data-scarce Kokcha subbasin Afghanistan. The Revised Universal Soil Loss Equation (RUSLE) model used erosion. satellite-based data are obtain RUSLE factors. results show that slight (71.34%) and moderate (25.46%) dominated basin. In contrast, high (0.01%) insignificant area. highest amount of observed Rangeland (52.2%) follow...

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In the long-term, wind erosion has considerable impact on rangelands. The aim of this study is to understand the changes of Hanitiyeh Rangelands located 30 kilometers east of Ahvaz and its function. Two transects, 42 meters in length, in wind gradient, patch and inter patch with 5 repeats that included shrub log complex, bush, grass, shrub, shrub-grass and bare open soil were measured. In addit...

Ali Asghar Naghipour Borj Hadi Radnezhad Maryam Haidarian Aghakhani Masoud Nasri

Converting the native rangelands to simplified agronomic communities causessome changes in soil carbon, nitrogen and phosphorus. Establishing of perennial plantcommunities on formerly cultivated rangelands is expected to stabilize soil properties andincrease the amount of C, N, P stored in rangeland soils, but there is little information on whatplant communities are the most effective for impro...

Journal: :Global and Planetary Change 2021

About 21% of the African population directly depends on rangeland resources. As this number is predicted to grow, it important understand response rangelands global environmental change and formulate, in turn, better hypotheses their capacity support livelihoods. Here we used three decades satellite data a dynamic vegetation model study recent climate describe changes structure accompanying gre...

2007
Meg L. Pollock Colin J. Legg John P. Holland Chris M. Theobald

Expert opinion was sought on 2 issues relating to herbivory: seasonal sheep preferences for plant species and seasonal plant response to grazing. Expert opinion is commonly used to parameterize models: it is therefore important to assess its quality. Understanding the limitations of expert knowledge can allow prioritization of future research. Nine experts in plant or grazing ecology from Scotl...

Journal: :مرتع و آبخیزداری 0
دیانا عسکریزاده دانشجوی کارشناسی ارشد مرتعداری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران غلامعلی حشمتی استاد، دانشکده مرتع و آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

abiotic factors, as topographic and physicochemical properties of soil, are the most important effective factor on vegetation in rangeland ecosystems which have the most important performances to forming and succession of plant vegetation. ecologic management of rangelands can be desired by better understanding of these effective factors. then, rangeland of javaherdeh (ramsar) in the northern a...

Journal: :مرتع و آبخیزداری 0
غلامعلی حشمتی استاد دانشکده مرتع و آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان دیانا عسکری زاده کارشناس ارشد مرتعداری دانشگاه علوم کشاورزی و منابع طبیعی گرگان محمد رحیم فروزه دانشجوی دکتری علوم مرتع، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

in order to determine the diet of dalagh sheep, winter rangeland of gomishan plain was selected. after delineating of the grazingland territory, rangeland condition and plant combination was determined by range value method and range trend was obtained by trend balance method. time of bite-count record was done in morning and afternoon in a five-day period; first week of november (1389) and las...

2005
N. D. MacLeod J. G. McIvor

Contemporary Australian rangeland management is characterised by concurrent processes of a continuing intensification of land management practices and simplification of landscape ecological processes. This dual characteristic is associated with increasing levels of potential conflict between land management practices that promote improved economic performance of rangeland enterprises at the app...

2002
MARÍA E. FERNÁNDEZ-GIMÉNEZ

Support for range management interventions by the World Bank and other international development institutions has a somewhat checkered history. In certain respects, this has mirrored theoretical developments and shifts in thinking among rangeland professionals, but the relationship between rangeland science and development policy and practice is far from direct. It is mediated by contextual fac...

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