| 坡地土壤氮素与降雨、径流的相互作用机理及模型 |
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| 引用本文： | 张兴昌,邵明安.坡地土壤氮素与降雨、径流的相互作用机理及模型[J].地理科学进展,2000,19(2):128-135. |
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| 作者姓名： | 张兴昌 邵明安 |
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| 作者单位： | 黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨陵,712100 |
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| 基金项目： | 国家自然科学基金项目!( 4 9871 0 4 9)，中国科学院重大研究项目! ( KZ951 - B1 - 2 1 1 )资助 |
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| 摘 要： | 坡地土壤氮素径流损失表现为两种形式 ,溶解于径流中的矿质氮随径流液流失 ,吸附于泥沙颗粒表面以无机态和以有机质形式存在的氮素。坡地土壤氮素流失过程实际上是表层土壤氮素与降雨、径流相互作用的过程 ,土壤氮素流失的多少主要受相互作用的限制。从分析土壤与降雨、径流相互作用入手 ,分析了土壤氮素与降雨、径流相互作用过程及机理 ,并对相互作用模型进行探讨。
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| 关 键 词： | 土壤氮素 降雨径流 相互作用 模型 |
| 收稿时间： | 2000-03-01 |
| 修稿时间： | 2000-05-01 |
The Interacting Models and Mechanisms of Soil Nitrogen with Rainfall and Runoff |
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| ZHANG Xing-chang,SHAO Min-gan.The Interacting Models and Mechanisms of Soil Nitrogen with Rainfall and Runoff[J].Progress in Geography,2000,19(2):128-135. |
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| Authors: | ZHANG Xing-chang SHAO Min-gan |
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| Institution: | State Key Laboratory of Soil Erosion and Dryfarming on Loess Plateau, Yangling, Shannxi Province 712100 |
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| Abstract: | Soil N loss by erosion on slope land is affected by soil mineral N loss mainly by runoff and organic N loss mostly by sediment. The process of soil nitrogen loss by erosion is restricted by interaction of soil nitrogen with rainfall and runoff. The interacting process of soil N with rainfall is divided into two stages: under rainfall conditions, soil N releasing process from soil to rain drops and soil N (mostly nitrite N) infiltrating process from top soil to deep soil in soil profile. Meanwhile, interacting process model of soil N with runoff is divided into three types, i.e. the mixed depth model of interacting process of soil N with runoff, the releasing and transporting model of soil N from topsoil to runoff and from upper slope to down slope, and process model of soil N loss by erosion. Based on analysis on interaction of soil with rainfall and runoff on slope land, the interacting models and mechanisms of soil nitrogen with rainfall and runoff are discussed to provide research methods and thoughts for further study on soil N loss by erosion. |
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| Keywords: | soil nitrogen rainfall and runoff interaction models |
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