Soil Nutrient Content of Different Land-use Types in Karst Rocky Desertification Area in Central Guizhou Province

[Objective] The study aimed to discuss the effect of different land-use types on the soil nutrient content and distribution.[Method] Ninety-six samples of soil were selected from cultivated land,forest land and waste land in the classic Karst mountain area in Puding County of Guizhou Province and the physical and chemical analysis on the soil nutrients from 3 kinds of land-use types were made in lab.[Result] The pH in soils from 3 kinds of land-use types in order was the waste landforest landcultivated land;the organic matter content in soil in order was forest landwaste landcultivated land.In the in soil from 3 kinds of land-use type,the total N content was rich;the available N was lower,especially in cultivated land;the total P content was very low and the soils in which the total P content was lower than 1.0 g/kg were 95.23%,95.83% and 100% of the cultivated land,forest land and waste land resp.;the effective P content in the cultivated land was higher,but that in forest land and waste land were lower;the total K and available K content in waste land were higher and the cultivated land and forest land lacked K to different extent.[Conclusion] This study provided the reference for recovering and reconstructing the ecosystem and agricultural production in Karst rocky desertification area