نتایج جستجو برای: grazing capacity

تعداد نتایج: 292412  

Journal: :علوم دامی ایران 0
حسین ارزانی استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران سعید برخوری دانشجوی سابق کارشناسی ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران جواد معتمدی دانشجوی دکتری پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسین آذرنیوند دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران

information on animal daily forage needs is essential for an estimation of rangeland grazing capacity. accordingly, weight and animal unit equivalent (aue) for each individual class of animal should be determined. live weights of baloochi sheep as based on average live weights of 3 and 4 year old ewes were determined. five herds of baloochi breed sheep were selected for the task. in each herd, ...

Journal: :journal of rangeland science 2011
e. fakhimi m. mesdaghi gh.a. dianati tilaki m. tavan

grazing management plays an important role in the continuous and economicutilization of pastures. proper grazing management is a main factor for the accumulation ofplant litter which reduces soil erosion and increase the soil permeability to keep moremoisture in the soil. in current study, the effect of three different grazing intensities (low,moderate and high) along with the grazing gradient ...

2018
Haiyan Ren Friedhelm Taube Claudia Stein Yingjun Zhang Yongfei Bai Shuijin Hu

Many biodiversity experiments have demonstrated that plant diversity can stabilize productivity in experimental grasslands. However, less is known about how diversity-stability relationships are mediated by grazing. Grazing is known for causing species losses, but its effects on plant functional groups (PFGs) composition and species asynchrony, which are closely correlated with ecosystem stabil...

Journal: :مرتع و آبخیزداری 0
فاضل امیری استادیار دانشکده مهندسی گروه منابع طبیعی، دانشگاه آزاد اسلامی واحد بوشهر، ایران. حسین ارزانی استاد دانشکده منابع طبیعی، دانشگاه تهران، ایران ابراهیم گویلی فارغ التحصیل کارشناسی ارشد دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران.

existence of pollen and nectar plants in vegetation composition of natural environment is essential for apiculture as one of the utilization types in multiple uses of environmental resources. therefore, development of this strategy based on indigenous knowledge will increase stakeholder income, which can decrease stocking rate based on range grazing capacity. due to high dependence of bee to pl...

Journal: :iranian journal of basic medical sciences 0
akbar nikkhah department of animal sciences, faculty of agricultural sciences, university of zanjan, zanjan, iran

tissue nutrient supply may be synchronized with endogenous physiological rhythms to optimize animal and human health. glucose tolerance and insulin sensitivity have endogenous rhythms that are not essentially dependent on food type and eating. human glucose tolerance declines as day comes into night. based on such evolutionary findings, large evening meals must be avoided to reduce risks of vis...

2011
J. L. Beck R. D. Mealor B. W. Hess G. E. Moss S. L. Lake

Changes in commodity pricing and environmental concerns are changing animal agriculture throughout the United States. Adopting multispecies grazing as an alternative production system could result in improved forage utilization, increased animal performance, and reduced production costs, and thereby improve the financial stability of livestock operations. This study focused on the Silver Spur R...

ژورنال: مرتع 2021
Akbarloo, Moosa, Barani, Hossein, Darvishi, Leila, Ghelichnia, Hassan,

Attention to the quality and quantity of forage plants, palatability and species preference, are among the information needed to properly manage pasture grazing. One of the prominent plants in the Nour Rud rangelands are Allium spp plants that have an acceptable distribution in the area. For the sake of the study, the preferred value of different species of Allium’s for Shal sheep with an avera...

2006
Temuulen Tsagaan Sankey Cliff Montagne Lisa Graumlich Rick Lawrence Jerry Nielsen

We studied five lower forest–grassland ecotones in the Darhad Valley in northern Mongolia and investigated the effects of 20th Century grazing regimes and changes in grazing management on ecotone dynamics at a local scale. A total of 2968 Siberian larch (Larix sibirica) trees were cored and tree-age distribution was constructed to determine 20th Century tree establishment. Tree age and location...

1998
JOHN W. WALKER RODNEY K. HEITSCHMIDT

Research was conducted on the effects of rotational grazing (RG) compared to continuous grazing (CG) on the behavior of cattle grazing on rangelands. Different livestock den&tics in the RG treatments were created by varying the size of paddocks in a 4651a, U-paddock, cell deaigntd RG treatment stocked at a rate of 3.6 ha/cow/yr. Paddock sizes of 30 and lo-ha were used to simulate RG with 14 (RG...

Journal: :Conservation 2023

Soil compaction is one of the main causes soil degradation, and some parameters have been used to characterize it, like those related compressibility degree compactness. To evaluate rotational grazing time during winter presence absence grazing, on compactness a Cambisol, an experiment was installed consisted corn planting for silage, fallow pasture period, with two treatments evaluating amount...

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