中文摘要：

选取黄土高原区大南沟流域非耕地中灌木林地、摞荒地、荒草地、林地土壤养分数据,利用常规数据处理软件进行分析,得出如下结论：（1）水土流失造成摞荒地中土壤养分最低,需要把摞荒地改为灌木林地或林地;（2）磷含量从生长季开始随着时间推移一般呈现逐渐降低趋势,主要是水土流失造成的;（3）改变非耕地土地利用结构,增加地表植被覆盖率;占黄土高原一半以上的非耕地区是环境脆弱区之一,非耕地区土壤养分变化对环境产生重要影响,为土地利用结构的改变和当地的可持续发展提供理论支持。

英文摘要：

Four types of land were selected and analyzed soil nutrition of shrubbery, disuse land, wasteland and woodland by general software in Da Nan Gou catchment on the Loess Plateau, there were three conclusions： （1） Soil nutrition of the disuse land were the lowest, and there was necessary for developing land use of shrubbery or woodland; （2） The concentration of phosphorus reduced during the growth, generally, soil and water erosion were the major factors; （3） Changing the structures of the non- plough land use, and increasing land cover. We should attach importance to the influences of changing on soil nutrition on the non-plough land which distributed widely on the Loess Plateau. It provided a theory for the changing on the structures of land use and sustainable development.