A study of the effects of different grazing Intensities on soil physical properties of grassland and forest floor ―― A case study of Hilly and Gully Regions on the Loess Plateau
2006
Fan Chunmei | Liao Chaoying | Li Peiyu
chinois. 研究放牧强度对林草地土壤物理性状的变化。通过放牧试验的方法，研究了黄土高原丘陵沟壑区――山西偏关县草地和柠条林地在不同放牧强度、不同放牧畜种条件下表层土（0～10 cm）的物理性状。放牧强度直接影响着草地和柠条林地土壤的物理结构。随放牧强度的增加，牲畜对土壤的践踏加剧，导致土壤紧实度增加，容重增加，含水量和孔隙度下降。从畜牧羊种选择来看，绵羊相对于山羊来说对放牧地践踏较轻，土壤容重较小，土壤含水量和孔隙度则较高。林草地土壤表层（0～10 cm）的物理性状对放牧强度的反应比较敏感。
Afficher plus [+] Moins [-]anglais. The objective of this article was to study the changes in soil physical properties with different grazing intensities. With grazing field experiment, the effects of different grazing intensities and different types of livestock on physical properties of surface (0-10 cm) soil of grazing grassland and forest land with Caragana korshinskii Kom. were studied at hilly-gully regions on the Loess Plateau ―Pianguan, Shanxi Province. The results showed that grazing intensity directly influenced the physical structure of soil of grazing grassland and Caragana korshinskii Kom. The soil bulk density increased along with the increase of grazing intensity, while water content and soil porosity decreased. Compared with goat selected as grazing livestock, sheep had a lesser that trampling effect on grazing land and the soil bulk density, was relatively small. The water content and soil porosity of the grazing land under sheep is higher than that №under goat. Consequently, the soil properties of the surface layer (0-10 cm) grazing grassland and Caragana korshinskii Kom. are most sensitive to grazing intensity.
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