| 元谋干热河谷坡耕地土壤侵蚀造成的土地退化 |
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| 引用本文： | 陈奇伯,王克勤,李金洪,朱国进,李跃.元谋干热河谷坡耕地土壤侵蚀造成的土地退化[J].山地学报,2004,22(5):528-532. |
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| 作者姓名： | 陈奇伯 王克勤 李金洪 朱国进 李跃 |
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| 作者单位： | 1. 西南林学院,云南,昆明,650224
2. 云南省元谋县水土保持办公室,云南,元谋,675000 |
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| 基金项目： | 云南省教育基金项目 ( 0 2ZY0 5 9)，云南省自然科学基金重点项目 ( 2 0 0 1D0 0 0 82Z)~~ |
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| 摘 要： | 在元谋干热河谷土壤侵蚀特征分析的基础上，对坡耕地土壤侵蚀造成的土地退化进行了模拟研究。结果表明，土壤侵蚀造成表层耕作土壤的物理性能下降、养分流失和水分入渗能力降低。表层耕作土壤的容重比下层土壤低12．7％，总孔隙度高10．9％，有机质高37．3％，120min累计入渗总量是下层土壤的1．6-2．2倍。模拟土壤侵蚀与土地生产力关系的小区试验结果显示，坡耕地每流失1cm表土，土地生产力水平平均下降4．54％。
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| 关 键 词： | 干热河谷 坡耕地 土壤侵蚀 土地生产力 土地退化 |
| 文章编号： | 1008-2786(2004)05-0528-05 |
| 修稿时间： | 2004年1月4日 |
Land Degradation Caused by Soil Erosion of Slope in Dry-Hot Valley of Yuanmou County |
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| CHEN Qibo,WANG Keqi,LI Jinhong,ZHU Guojin,LI Yue.Land Degradation Caused by Soil Erosion of Slope in Dry-Hot Valley of Yuanmou County[J].Journal of Mountain Research,2004,22(5):528-532. |
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| Authors: | CHEN Qibo WANG Keqi LI Jinhong ZHU Guojin LI Yue |
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| Institution: | CHEN Qibo~1,WANG Keqi~1,LI Jinhong~2,ZHU Guojin~1,LI Yue~1 |
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| Abstract: | Based on analysis of soil erosion property in dry-hot valley of Yuanmou county, land degradation caused by soil erosion on slope is researched. The results show that the soil erosion on slope not only bring about soil nutrients lost, but also cause the soil physical property damaged, soil infiltration capability weakened. Bulk weight of the cultivated topsoil from 0 to 30cm is 12.7% lower than that of below soil layers from 30 to 100cm, the soil total porosity is 10.9% higher, and soil organic matter is 37.3% higher, and total soil water infiltration amount is 1.6-2.2 times as much as the below layers. The direct result of the soil degradation is the reduction of land productivity. The impact of soil erosion in different slopes on different crops is averagely by 4.54% with the 1 cm topsoil lost. |
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| Keywords: | dry-hot valley slope field soil erosion land productivity land degradation |
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