| 黄土地区耕作侵蚀过程中的土壤再分布规律研究 |
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| 引用本文： | 王占礼,邵明安,李勇.黄土地区耕作侵蚀过程中的土壤再分布规律研究[J].植物营养与肥料学报,2002,8(2):168-172. |
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| 作者姓名： | 王占礼 邵明安 李勇 |
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| 作者单位： | 1.西北农林科技大学、中国科学院水利部水土保持研究所土壤侵蚀与旱地农业国家重点实验室 陕西杨凌712100; |
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| 基金项目： | 国家自然科学基金(49871051);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(02-B004)资助. |
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| 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。
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| 关 键 词： | 黄土地区 耕作侵蚀 土壤再分布 水平位移 垂直位移 土壤埋深 |
| 文章编号： | 1008-505X(2002)02-0168-05 |
| 修稿时间： | 2001年7月19日 |
Study on the soil redistribution induced by tillage erosion in loess region of China |
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| WANG Zhan-li,SHAO Ming-an,LI Yong.Study on the soil redistribution induced by tillage erosion in loess region of China[J].Plant Nutrition and Fertilizer Science,2002,8(2):168-172. |
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| Authors: | WANG Zhan-li SHAO Ming-an LI Yong |
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| Institution: | 1.State Key Lab. of Soil Erosion and Dryland Farming;Inst of Soil and Water Conserv;Northwest Sci-Tech Univ of Agric and Fores;CAS and MWR;Yangling;Shaanxi 712100;China; |
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| Abstract: | 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 |
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