垂直侵蚀随降雨强度、降雨历时的增加而增加，不同土壤的侵蚀临界降雨量不同；
The extent of vertical erosion increases with precipitation, rainfall intensity and soil infiltration rates, and different soil has different critical rainfall amount.
结果表明：（1）垂直侵蚀物质输移量随深度的增加而减少，随降雨强度的增加而增加；
The results show:(1) The quantity of material movement of vertical erosion increases with the rain intensity but decreases with the depth;
通过进一步分析植被根系分布特征和土壤垂直侵蚀产沙之间的联系，建立了草地植被根系生物量与土壤垂直侵蚀产沙特征之间的定量关系。
Further analysis of the root distribution pattern and the vertical sediment yield allowed establishment of a quantitative relationship between root biomass and vertical sediment yield.
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