辽河源头区坡耕地面源污染阻控技术研究

辽河源头区多为低山丘陵区域．由于人类对土地资源的不合理开发利用，致使森林覆盖率降低，坡耕地面积增多。为提高单位面积的农作物产量，主要措施之一就是增加化肥投入量．随着农田生态系统化肥投入量的增加，不被作物吸收的营养物质通过淋溶渗透地表径流等进入水环境中。坡耕地面源污染阻控研究是基于其产生的原因及迁移过程，采取农业耕作措施、水土保持工程措施和生物措施等相结合方式，构建坡耕地面源污染控制技术体系。

Research on Controlling Technology of Slope Land Non-point Pollution in Liao River Source Area

The source area of the Liao River is most hill.Because of unreasonable exploiting for land resources,redused the fraction of coverage of forest and increased slope land area. One of the main measures is to increase consumption of synthetic fertilizers in order to increase per unit area yield ~ With the consttmption of synthetic fertilizers increasing,not absorbed nutrient entered the surface water by runoff and passed down to the groundwater. The research on controlling technology of slope land non-point pollution be based on its cause and migration processmerging and removing of pollutants, resort to method which link farming measure with conservation of water and soil and biological control, In order to construct controlling technology system of slope land non-point pollution.