Soil Nutrients of Arable Land in Guizhou

The content of organic matter,total nitrogen,available phosphorus and rapid available potassium of 162716 soil samples from arable land of 36 counties in Guizhou was analyzed and evaluated by using the grading standard of second national soil survey to provide the theoretical basis for formulation of soil nutrient grading division standard,rational utilization and management of arable land in Guizhou.The results show that the content of organic matter,total nitrogen,available phosphorus and available potassium in soil of arable land is 26～42g/kg,1.5～2.3g/kg,11～22mg/kg and 100～180mg/kg respectively,the content of organic matter and total nitrogen in soil of arable land is higher than national mean level,the available phosphorus content in soil is higher than national medium level and the rapid available potassium content in soil is about equal to national mean level.The analyzing result has great value for grasping the soil nutrients condition of arable land in Guizhou,utilization and management of soil nutrients and rational application of fertilizer for high and stable yield.