| 西南地区山地不同土地退化类型特征及调控途径 |
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| 引用本文： | 张建平.西南地区山地不同土地退化类型特征及调控途径[J].地理科学,2001,21(3):236-241. |
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| 作者姓名： | 张建平 |
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| 作者单位： | 中国科学院、水利部成都山地灾害与环境研究所, |
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| 摘 要： | 土地退化不仅是目前全还需性的重大环境问题之一，而且也是重大的社会和经济问题之一，西南地区的土地退化是以水力侵蚀为主要动力形成的，文中简述了西南地区的土地退化状况，选择了4个（楚雄市、遂宁市，毕节地区及元谋县）山地不同土地退化类型进行分析，讨论了土 退化过程，提出了土地退化调控途径。
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| 关 键 词： | 西南地区 土地退化状况 山地 类型 土地退化过程 调控途径 植树造林 水力侵蚀 农业结构 |
| 文章编号： | 1000-0690(2001)03-0236-06 |
Study on Land Degradation Characteristics of Different Types in Mountain Areas in Southwest China |
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| ZHANG Jian,ping.Study on Land Degradation Characteristics of Different Types in Mountain Areas in Southwest China[J].Scientia Geographica Sinica,2001,21(3):236-241. |
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| Authors: | ZHANG Jian ping |
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| Abstract: | Land degradation is not only a great environmental problem at present, but a great economic and social problem. Land degradation in southwest China is mainly formed by water erosion. This paper, briefly descibed the land degradation status (slight, moderate and severe degraded land area is respectively 188852.5, 48128.81 and 16.393.62 km 2, and respectively makes up 14.30%,3.50% and 1.10% of the total area of southwest China)in southwest China, analyzed different land degradation types of 4 choosed areas(Chuxiong City in Yunnan Plateau(degraded area is 1159.44 km 2 and makes up 26.17% of the total area ), Suining City in hilly area in middle Sichuan Basin(degraded area is 3188.51 km 2, makes up 59.93% of the total area), Bijie Prefecture in lime stone area in Guizhou Province(degraded area is 9055.30 km 2, makes up 33.70% of the total area) and Yuanmou County in dry hot valley in Yunnan Province (degraded area below 1350m of altitude is 1006.02 km 2, makes up 70.15% of the total area)),discussed land degradation process(The land degradation process is under fragile eco environment(great height difference, steep slope, frequent heavy rain and rainstorm),human unreasonable social economic activity (reclaim slope land, cut forest, over grazing, etc. ) caused the process of land degradation), proposed ways(prevention and control of land degradation by the law; strictly control population with the N range of the equation: 0.2113K
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| Keywords: | The southwest areas Land degradation status Different land degradation type in mountain areas Land degradation process Ways to control and regulate land degradation |
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