摘要
中国土壤侵蚀面积达 492km2 ,除土壤、降雨、植被等自然因素外 ,超载放牧、陡坡开荒、工程建设等人为因素影响也很大。土壤侵蚀不仅破坏土地资源 ,而且制约粮食生产 ,污染水环境、淤积库容湖泊、危害城市安全 ,必须积极加以防治。
The total coverage of land suffered from soil erosion has reached 492 km 2 in China.Apart from the natural factors of soil,precipitation and flora,artificial factors of overgrazing,reclaiming land at side of slopes and constructing projects play a big role.Soil erosion not only destroys the soil resources,but also restrains the agricultural production,pollutes water environment,slits up reservoirs and endangers city safety.
出处
《云南环境科学》
2001年第2期4-7,29,共5页
Yunnan Environmental Science
基金
国家自然科学基金!课题 ( 79970 0 71)
