农业工程学报2001，Vol.17Issue(1)：53-57,5.
中国黄土地区耕作侵蚀模拟
Modeling on Tillage Erosion in Loess Region of China
摘要
Abstract
Tillage erosion is a new field of soil erosion research. To q uantitatively describe processes of tillage erosion in loess region of China, th is paper modeled the tillage erosion here by conducting tillage experiment, in w hich small cubes were used as the tracers to trace and monitor soil movement, a nd regressive and theoretical analyses, and developed the model of tillage erosi on with which net erosion modulus at any point of slope profile can directly be calculated. The results showed that in the case of across-slope tillage operati on of come-and-go single pass along contour line from down-slope to up-slope in which the soil was turned down-slope with local traditional plow pulled by animal power: (1) Mean horizontal distance of soil displacement per tillage oper ation in slope aspect direction is linearly related to slope gradient; (2) The n et erosion modulus at any position of slope profile per tillage operation is aff ected by soil bulk density, tillage depth, coefficient determined with soil and tillage conditions, and topography curvature.关键词
中国黄土地区/耕作侵蚀/模拟/水平运动距离/净侵蚀模数/地 形曲率分类
农业科技引用本文复制引用
王占礼,邵明安..中国黄土地区耕作侵蚀模拟[J].农业工程学报,2001,17(1):53-57,5.
