Characteristics of soil nutrients under different land use types in Liudaogou watershed of water and wind erosion area

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 farmlandforestgrassland,soil total N content was farm-landforestgrassland,soil total K was grasslandforestfarmland,available nitrogen content was farmlandforestgrassland,available P was farmland forestgrassland,available potassium was forestfarmlandgrassland;soil C/N was forestgrasslandfarmland;It showed a linear relationship between organic matter content and total nitrogen content,and reached a significant level(P0.01).Different land use types had important influences on soil nutrient content.