运用生物埂治理三峡库区坡耕地水土流失技术研究

阐述了三峡库区耕地构成和开展针对性研究的目的与意义，三峡库区水土流失的严重危害。试图通过种植不同的生物篱笆，探求治理三峡库区水土流失的有效途径。选择了7种不同的生物篱笆，设立小区试验研究生物埂对治理坡耕地水土流失的机理，分析其水土流失构成机理与成因，提出了三峡库区减少水土流失，防止农业面源污染的对策与措施。通过试验得出以下结论：应用生物埂技术可以保持水土，主要是减少土壤中养分的主要载体<{0.02 mm}大小的泥砂颗粒的流失，从而有效地保护了生态环境，增大库区环境容量。实施生物埂技术可以创建缓坡梯田，金荞麦、百喜草等是适合库区实际的生物埂植物。

USE OF HEDGEROWS TO CONTROL SOIL EROSION OF CULTIVATED SCARP LAND IN THE THREE GORGES AREA

By analyzing the composition of cultivated scarp land in the Three Gorges Area, we noticed that the soil erosion in this Area was quite serious. In order to control the soil erosion in cultivated scarp land, seven different hedgerows with different plants were set up and their effect on the control of soil erosion and pesticide pollution was examined. It is found that hedgerows can control the soil erosion by maintain mostly less than 0.02 mm soil particles from washed away, which are identified as fertilizer carriers, and thus the environmental capacity increases as a result. It is further proposed that hedgerows should be employed to build up ladder fields, with wild buckwheat Rhizome and Bahiagrass as suitable plants for the cultivated land in the Three Gorges Area.