坡面土壤侵蚀垂直分布定量分析研究  

Study on Vertical Distribution of Soil Erosion on Loess Slope

作　　者：武春龙[1] 刘普灵[1] 郑世清[1] 吴普特[1] 周佩华[1] 

机构地区：[1]中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《水土保持研究》1997年第2期34-40,共7页Research of Soil and Water Conservation

摘　　要：通过野外侵蚀小区实验，进一步证明了稀土元素示踪法[1]在土壤侵蚀垂直分布研究中的可应用性。在一个侵蚀小区上，实验揭示出产沙强度随坡长存在三种变化模式．增长型，增长一递减型和波动型，其形成机理可能与住流过程有关。利用稀土元素在坡面的再分布、初步建立了治界被面沟蚀率的关系式。稀土元素点穴施效法尚存在问题，有待深入研究。Vertical varlabilityisa basic componentof soilerosion on loess slope. Experiments of field erosion Plot were conducted and furthersupportthe availability of rare earth elements (REE ) tracer method to studythe vertical distribution of soil erosion. Experiments on a erosion plot have firstly revealed that vertical distribution pattern ofsediment yield have three types that are continued -increasing type. increase -decreasing type and wave type. We have primarily ccnstructedmethod estimating ratio of rill erosion according to redistribution ofREE on loess slope.

关 键 词：土壤侵蚀 垂直分布 稀土元素 示踪法 

分 类 号：S157.1[农业科学—土壤学]