通过施放小立方块作为示踪材料进行耕作侵蚀试验及测量的方法 ,对黄土地区耕作侵蚀过程中的土壤再分布规律进行了研究。结果表明 ,土壤水平位移及垂直位移随坡度及深度的变化均可用二元线性方程描述 ;土壤耕作后的深度随其耕作前的深度及坡度的变化可用二元二次抛物面方程描述 ;耕层深度的 1/ 3左右是一个临界值 ,一次耕作前后 ,原耕层深度约 1/ 3处的土壤距地表深度基本不变 ,小于 1/ 3处的上层土壤距地表深度增大 ,大于 1/3处的下层土壤距地表深度减小。

Soil redist ribution induced by tillage erosion in loess region was investigated1 Small cubes were used as tracers of soil displacement1 The results showed that the variations of horizontal and vertical soil displacements with slope gradient and depth can be described with binary linear regression equation; the variations of soil depth after tillage with its depth before tillage and slope gradient can be described with binary quadratic paraboloid regression equation and after per tillage operation, depth of soil with about one thirds of tillage depth basically did not change , depth of soil with shallower than one thirds of tillage depth became deeper than before, and depth of soil with deeper than one thirds of tillage depth became shallower than before.