长期定位施肥对土壤钾素形态的影响

Effects of Long-term Located Fertilization on Soil Potassium Forms

按金继运(1992)确定的方法对土壤钾素形态进行分级,结果表明:施有机肥能增加土壤水溶性钾、交换性钾、非交换性钾、矿物钾及全钾含量。不同形态钾素之间密切联系,交换性钾、非交换性钾和矿物钾之间可以相互转化。钾素的形态与有机质含量、粘粒含量、阳离子交换量等土壤的理化性质密切相关。

Soil potassium forms were gradated using the method of Jin Jiyun（1992）, results showed： water soluble K.exchangeable K.non- exchangeable K.total K increased in the treatments of organic manure, and there were close relations between different potassium forms, exchangeable K. Non -exchangeable K and mineral K might transform each another. Potassium forms had significant correlation with clay content.CEC.organic matter.