نتایج جستجو برای: semi degraded rangelands due to grazing
تعداد نتایج: 10657160 فیلتر نتایج به سال:
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...
BACKGROUND Grassland degradation caused by overgrazing poses a threat to both animal husbandry and environmental sustainability in most semi-arid areas especially north China. Although the Chinese Government has made huge efforts to restore degraded grasslands, a considerable attempt has unfortunately failed due to an inadequate consideration of economic benefits to local communities. METHODO...
Awareness of rangelands plants palatability is required for estimating available forage to animals in all plant communities. In this research recording method was used to determine species palatability in rangelands of Deh- Shiekh in Kohkiloyeh and Boyer Ahmad Province. Three perennial species including Gundelia tournefortii, Bromus tomentellus, Hordeum bulbosum and two annual species of Agelup...
The main challenge to restoration in Iceland is vast areas of severely degraded land that has limited resource retention and limited ecosystem functioning. These are often hostile environments for plant establishment and survival, due to unstable surfaces that are prone to intensive cryoturbation and erosion by wind and have limited water-holding capacity. Most of the degraded rangelands are op...
overgrazing and inappropriate use of taleghan rangelands has led to poor and very poor condition for almost all vegetation types. taking the importance of rangelands in forage production and other benefits into consideration, management of these rangelands and improving their condition seems essential. the present research was conducted using data integration of vegetation, condition, slope, so...
A modified litter-bag method was used to measure plant fineroot decomposition in relation to biomass quality in a mixedgrass prairie. Measurements were made during three years on moderately and heavily grazed pastures that had been under cattle grazing for 17 years prior to sampling. Although we found no significant difference in initial fine-root litter quality between grazing treatments, nitr...
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 ...
one of the important factors to make a balance between number of grazing livestock and grazing capacity is whether forage contains sufficient energy and protein during grazing period or not. therefore in this study, forage quality was evaluated for important species in steppe rangelands of changuleh located in ilam province. to do this, samples from four species of hammada salicornia, salsola l...
To document trends in land use and herbaceous production, 71 field sites sampled among cropped fields, fallow fields and rangelands in the Fakara region (Niger) were monitored from 1994 to 2006. The overall trend in land use confirmed the historical increase of the cropped areas since mid 20th century, at an annual rate of 2% from 1994 to 2006. This trend is the result of changes in the relativ...
Grazing can alter plant species interactions in natural rangelands, which turn might influence the productivity of ecosystem but we do not fully understand how spatial variability diversity-biomass relationships are modulated by grazing intensity. Here, hypothesized that co-occurrence rangelands is mainly driven niche segregation due to and heterogeneity local resources, grazing, therefore, mod...
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