贵州省耕地土壤的养分状况

Soil Nutrients of Arable Land in Guizhou

为贵州省土壤养分等级划分标准的制定和耕地的合理利用与管理提供一定的理论依据,对贵州省36个县（市、区）共计162 716个耕地土壤样品的有机质、全氮、有效磷和速效钾含量状况进行统计分析,并采用全国第2次土壤普查分级标准对贵州省耕地土壤养分含量水平进行评价。结果表明：贵州耕地土壤有机质、全氮、有效磷和速效钾含量分别集中在26-42 g/kg、1.5-2.3 g/kg、11-22 mg/kg和100-180 mg/kg;贵州耕地土壤有机质及全氮含量均处于较高水平,有效磷含量处于中上水平,速效钾含量与全国平均水平相当。分析结果对掌握贵州耕地土壤养分状况、耕地养分利用管理和作物高产稳产的合理施肥具有重要意义。

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.