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以安徽省部分水稻土作为研究对象，用灰色关联法分析了水稻土耕层速效钾与各影响因素的相关性，结果表明，各因素与速效钾含量的相关顺序为：粘粒含量＞阳离子代换量（CEC）＞PH＞全钾量＞全磷量＞盐基饱和度＞全氮量＞有机质含量＞速效磷含量。
Taking the part of paddy soils in Anhui Province as the research object, the correlation between available potassium in paddy soil and various influencing factors was analyzed by gray relational method. The results showed that the order of correlation between each factor and available potassium was: clay content> cationic generation (CEC)> PH> total potassium> total phosphorus> basal saturation> total nitrogen> organic matter> available phosphorus.