柴达木盆地东南部土壤风蚀研究  

Soil Erosion Modelling Study in Southeastern Qaidam Basin

作　　者：张胜邦 董旭 刘玉璋[1,2] 张更权 刘建军 

机构地区：[1]青海省林业勘察设计院 [2]中国科学院兰州沙漠研究所

出　　处：《中国沙漠》1999年第3期293-295,共3页Journal of Desert Research

摘　　要：柴达木盆地东南部土壤风蚀风洞模拟实验结果表明，土壤风蚀强度随风力作用和下垫面因子不同而不同。净风对土壤风蚀作用较小，但在挟沙风作用下，风蚀强烈。地表类型不同风蚀强度变化很大，流动沙地是耕地（小麦留茬）的数百倍。土壤质地不同起沙风速不同，细沙和极细沙比例越高风蚀量越大。翻耕地与未翻耕地风蚀变化悬殊，翻耕地风蚀量是未翻耕地的１０倍以上。Soil erosion on different soil types in southeastern Qaidam Basin was modelled in wind tunnel. It was concluded that the degree of soil erosion was changing with wind forces and underlying surfaces. Soil erosion was less when wind only, but more when sand carring wind. The degree of soil erosion changed obviously with the underlying surfaces: more fine and superfine sands in soil, and more soil erosion; several hunderd times of eroded soil amounts on sand shifting land than on farmland (with wheat stubbles); ten times more of eroded soil amounts on ploughed farmlands than on unploughed ones. Natural vegetation and stubbles all have the function of preventing soil erosion.

关 键 词：柴达木盆地 风沙环境 风蚀 模拟实验 土壤风蚀 

分 类 号：S157.1[农业科学—土壤学]