西部地区生态环境保护建设中旱坡地水土流失的综合治理

The comprehensive harnessing of the soil erosion of dry slope farmland in the process of ecological environment protection and construction in west China

实施西部大开发战略 ,加强生态环境的保护和建设是其重要内容 ,天然林禁伐和陡坡耕地退耕还林是其主要措施。旱坡地的水土流失综合治理也应该是其主要措施之一。以四川省为例 ,目前水力侵蚀面积已占全省幅员面积的 4 4 4 % ,比 10年前扩大了 3 1个百分点 ,其重要原因是耕地土壤侵蚀量达到 2 2 178 75万t,占全省水蚀总量 73361 94万t的 30 2 %。在耕地侵蚀总量中 ,旱坡地侵蚀占 96%。旱坡地水土流失的综合治理 。

Intensifying the protection and construction of ecological environment was an important content in the strategy of west development.The ban for the damage of natural forest and the afforestation in steep slope farmland were main measures.In Sichuan province,the areas of soil erosion accounted for 44 4% of the total area,and increased by 3 1 Percentage compared with that of 10 years ago.The total amount of soil erosion in Sichun province reached 733 619 million ton,and the corresponding amount in farmland reached 221,786 million ton,which accounted for 30 2% of the total amount.The amount of soil erosion per unit in farmland was more than twice amount compared with average situation of soil erosion in whole province.The comprehensive control on the soil erosion in dry slope farmland should become an important content for Sichuan province in the process of west development and ecological environment protection.