烧荒坡面表层土壤机械组成降雨前后的变化特征

Variation Characteristics of Surface Soil Mechanical Composition in Burning Forestland Slope before and after Rainfall

[目的]为了揭示不同坡型坡面不同空间部位表层土壤发生侵蚀、搬运、堆积作用的差异。[方法]对六苟小流域烧荒林地不同坡型的坡面表层土壤进行降雨前后机械组成分布及变化特征研究。[结果]烧荒林地坡面表层土壤机械组成各粒径组分含量在坡面不同空间部位分布不一致。降雨前后坡面表层土壤机械组成的变化特征,可以指示降雨作用下,不同坡型坡面表层土壤在坡面不同空间部位的侵蚀——堆积作用。[结论]对于不同坡型条件下的坡面表层土壤侵蚀,还需要做深入研究。

[ Objective ] The research aimed to explore the difference of erosion, removal and accumulation of surface soil in different space of different slope＂ [ Method] The distribution and variation characteristics of surface soil mechanical composition in burning forestland slope with different slope type before and after the rainfall in Liugou small watershed were studied. [ Result ] The surface soil mechanical composition in burning forestland slope had differences in the different space position. Variation characteristics of surface soil mechanical composition before and after the rainfall could indicate the erosion-accumulation effect of the slope surface soil in the different space position under different slope type. [ Conclusion] The erosion of surface soil under the condition of different slope should to be studied further.