摘要
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 redistribution induced by tillage erosion in loess region was investigated Small cubes were used as tracers of soil displacement 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
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2002年第2期168-172,共5页
Journal of Plant Nutrition and Fertilizers
基金
国家自然科学基金 (4 98710 5 1)
陕西省人事厅留学基金
中国科学院知识创新工程项目
中国科学院山地环境学"百人计划"(1999年度 )
黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目 (0 2 B0 0 4)资助
关键词
黄土地区
耕作侵蚀
水平位移
垂直位移
土壤埋深
土壤侵蚀
loess region
tillage erosion
soil redistribution
horizontal displacement
vertical displacement
buried soil depth
