坡面侵蚀分布特征动态变化过程的REE示踪法研究  

STUDY ON CHANGEABLE PROCESS OF SOIOL EROSION DISTRIBUTIVE CHARACTERISTICS ON THE SLOPE SURFACE BY REE TRACING METHOD

作　　者：琚彤军[1] 刘普灵[1] 

机构地区：[1]西北农林科技大学

出　　处：《核农学报》2005年第1期58-61,共4页Journal of Nuclear Agricultural Sciences

基　　金：国家自然基金项目 (4 0 4710 79);中科院知识创新工程 (KZCX1 0 6 0 2 0 5 )项目

摘　　要：本文利用REE示踪技术 ,初步探讨了野外全坡长小区在次降雨过程中 ,坡面侵蚀时空分布的动态变化过程。结果表明 :利用REE示踪法不仅可以准确地测定坡面不同地形部位的相对侵蚀量 ,还可通过对侵蚀过程样的分析 ,较为客观揭示降雨侵蚀过程中坡面各部位相对侵蚀量的时空变化趋势。坡面各部位相对侵蚀量随时间的变化可能存在三种模式 ,增长递减型、递增型和波动型。其最大侵蚀部位主要集中在坡面中段 ,并随降雨的持续 ,存在向坡面下部移动的趋势。In this paper the dynamic changing process of soil erosion time and spatial distributive characteristics on slope surface was studied by the rare earth element(REE) tracing method. The results show that the REE tracing method can be used to precisely determine the relative erosion amount on different topographical parts in slope surface, and to reveal the changing trends of erosion amount on the different part in the process of soil erosion. It was concluded that the distribution pattern of erosion with the rainfall time expressed three types, they were increase-decreasing type, increasing type and wave type. The highest erosion part located in middle part of slope surface, moved down with rainfall lasting.=

关 键 词：坡面侵蚀 REE示踪法 侵蚀量 侵蚀过程 动态变化 部位 利用 野外 初步探讨 分布特征 

分 类 号：S157[农业科学—土壤学]