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紫色土是三峡库区移民安置区的主要坡地土壤。本研究采用典型区域调查，代表性土壤剖面养分分析，结合实验小区人工降雨的方法，初步研究了发育于侏罗纪紫色砂泥岩母质上紫色土的养分状况、养分流失特点、过程及影响养分流失因素。
Purple soil is the main slope soil in the resettlement area of the Three Gorges Reservoir. In this study, a typical regional survey, representative soil profile nutrient analysis, combined with experimental plot of artificial rainfall method, preliminary study of the Jurassic purple sandstone parent purple soil nutrient status, nutrient loss characteristics, processes and impact on nutrient loss factor.