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对我国主要茶区茶园土壤分析结果表明，土壤钾素含量大都处于中等水平以下，且呈地带性分布，即缓效钾的含量由北而南下降，速效钾占缓效钾的比例由北而南增加。对土壤钾素容量／强度（Ｑ／Ｉ）分析表明，茶园土壤钾素的ＡＲｋｅ（强度指标）通常都小于０．０１（ｍｏｌ／ｌ）－１２。施用钾肥能显著提高供钾强度指标ＡＲｋｅ和ΔＫ０（容量指标）。施镁能增加ＡＲｋｅ，但对ΔＫ０和ＰＢＣｋ（缓冲能力）无明显影响。不施钾处理土壤的ＡＲｋｅ和ΔＫ０均趋于下降
The results of soil analysis of tea plantations in the main tea areas in China showed that most of the soil K concentrations were below the middle level and showed zonal distribution. That is, the content of slow-acting potassium decreased from north to south, and the ratio of available potassium to slow-acting potassium was from north to South increased. Analysis of soil K / Q showed that soil potassium in tea plantations generally had an ARke (intensity index) of less than 0.01 (mol / l) -12. Application of potassium fertilizer can significantly increase the potassium supply intensity index ARke and ΔK0 (capacity index). Applying magnesium increased ARke, but had no significant effect on ΔK0 and PBCk (buffering capacity). Both ARke and ΔK0 in the untreated soil tended to decrease