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首页> 外文会议>International Grassland Congress >Effect of grazing on soil fertility and trace elements of temperate desert steppe in Northwestern China
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Effect of grazing on soil fertility and trace elements of temperate desert steppe in Northwestern China

机译：放牧对中国西北地区温带沙漠草原土壤肥力和微量元素的影响

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Grazing is the dominant land use of temperate desert steppe in northwestern China. It is well established that the grazing process has impacts on plant production and biodiversity (Li 1997), but less is known about the effects of grazing chemical characteristics of grassland soils. Livestock feeding activities, especially the provision of supple-mentary sources, may influence pasture nutrient cycle, and in turn change the chemical composition of the grassland soil (Rong et al. 2001). Soil fertility may be affected by the type use and grazing intensities because these may cause alterations in soil physical and chemical properties as well as the soil biotia (Marzaioli et al. 2010; Caravacaa et al. 2002). The combination of these factors can reduce pasture productivity (Islam and Weil 2000; San-chez-Maranon et al. 2002). Soil was the nutrient carrier to forage and livestock.Since changes in soil property will be reflected in both forage and livestock production directly or indirectly, it was important to study the effect of soil on grassland and grazing (Zhang et al. 2002), especially trace elements such as iron (Fe), manganese (Mn), copper (Cu) and zinc (Zn). In Alxa (Inner Mongolia), for example, Wu et al. (2008) reported a difference in the accumulation of these elements due to grassland type with a sequence of Fe>Mn>Zn>Cu in alpine meadow soil compared to a sequence of Fe> Mn>Cu>Zn in mountainous steppe and desert steppe soils. The objective of this study is to investigate the effect of grazing on the concentrations of Fe, Mn, Cu and Zn in temperate desert steppe in Gansu Province.
机译：放牧是在中国西北部的温带沙漠草原的主导土地利用。很明显，放牧过程对植物生产和生物多样性产生影响（李1997），但对草地土壤的化学特性的影响较小。牲畜饲养活动，特别是提供抑制效果来源，可能影响牧场营养循环，反过来改变草原土壤的化学成分（Rong等人。2001）。土壤肥力可能受到类型使用和放牧强度的影响，因为这些可能导致土壤物理和化学性质以及土壤生物体（Marzaioli等，2010; Caravacaa等人2002）的改变。这些因素的结合可以减少牧场生产力（伊斯兰教和2000年; San-Chez-Maranon等，2002）。土壤是饲料饲料饲料，畜牧业。土壤性质的变化将直接或间接地反映出牧草和牲畜生产，重要的是研究土壤对草地和放牧的影响（张等人。2002），尤其是微量元素如铁（Fe），锰（Mn），铜（Cu）和锌（Zn）。在Alxa（内蒙古），例如，Wu等人。 （2008）报告了由于草原土壤中的草原型，与山上草原和沙漠草原土壤中的Fe> Mn> Cu> Zn序列相比，由于草地型，在阿尔卑斯山草地上的序列中，这些元素的积累差异。本研究的目的是探讨放牧对甘肃温带沙漠草原的Fe，Mn，Cu和Zn浓度的影响。

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