环县北部草场土壤基本肥力性状调查及改良利用研究

Study on the Investgation and Improvement of the Basic Fertility Traits of Soil in the Grassland in Northern Huanxian County

对环县北部天然草场0～20 cm土层土壤的常量速效养分及有机质状况调查分析的结果表明：阴、阳坡土壤有机质平均含量分别为42.48、33.50 g/kg;阴、阳坡土壤速效钾含量分别为186.5、172.4 mg/kg;阴、阳坡土壤有效氮含量分别为49.91、44.71 mg/kg;阴、阳坡土壤有效磷含量分别为9.89、8.97 mg/kg,并且阴坡土壤有效氮、有效磷、速效钾的含量高于阳坡。

By taking the soil of 0-20 cm soil layer of natural grassland in the northern Huanxian to determinate the effective nitrogen, phosphorus, potassium and its organic matter content, the results showed that the average content of organic matter in the soil of shady slope and sunny slope were 42.48,33.50 g/kg.The content of available potassium in the slope of shady and sunny were 186.5,172.4 mg/kg,the content of effective nitrogen in the slope of shady and sunny were 49.91,44.71 mg/kg, the content of available phosphorus in the slope of shady and sunny were 9.89,8.97 mg/kg, and the content of effective nitrogen, phosphorus, potassium in soil slope of shady slope was higher than the sunny slope.