A study was carried out on the characteristics of soil nutrients under three land use types of farmland, forest and grassland in Liudaogou watershed by using traditional statistics combined with geo-statistics. The result showed that soil organic matter content was farmland > forest > grassland, soil total N content was farm-land > forest > grassland, soil total K was grassland > forest > farmland, available nitrogen content was farmland > forest > grassland, available P was farmland forest > grassland, available potassium was forest > farmland > grassland; soil C/N was forest > grassland > farmland; It showed a linear relationship between organic matter content and total nitrogen content, and reached a significant level ( P <0.01) . Different land use types had important influences on soil nutrient content.%利用经典统计与地统计学相结合的方法,以六道沟流域农用地、林地和草地三种土地类型为研究对象,测定各不同利用方式下土壤有机质、全氮、全磷、全钾、速效氮、速效磷、速效钾、C/N值八种养分指标.结果表明,土壤有机质、全氮含量表现为农用地＞林地＞草地,全磷含量表现为农用地＞草地＞林地,土壤全钾含量表现为草地＞林地＞农用地,速效氮含量表现为农用地＞草地＞林地,速效磷表现为农用地＞林地＞草地,速效钾表现为林地＞农用地＞草地;土壤C/N值表现为林地＞草地＞农用地;有机质含量与金氮含量呈线性关系,且均达极显著水平(P＜0.01).结果说明不同土地利用方式对土壤养分含量有重要影响.
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