晋南石灰性土壤钾素动态研究表明：潮土、褐土土壤速效钾含量均呈下降趋势，其中潮土下降３１．２５ｍｇ／ｋｇ，褐土下降１５．７５ｍｇ／ｋｇ。土壤质地类型、农业生态区及种植制度不同，土壤速效钾含量下降不同。小麦钾肥试验结果表明：亩施Ｋ２ＳＯ４５～２０ｋｇ，产量增加５２．９～１１１．５ｋｇ／亩，净增收益３２．７～６２．６元／亩。同时获得了小麦最高产量施肥量和经济最佳施肥量 The dynamic potassium in calcareous soil in Jinnan showed that the contents of available potassium in the calcareous soil and the cinnamon soil all showed a decreasing trend, in which the tide soil decreased by 31.25mg / kg and the cinnamon soil decreased by 15.75mg / kg. Different types of soil texture, agro-ecological zones and planting systems, soil available K content decreased. The test results of wheat potassium fertilizer showed that the output of KSO K2SO 45 ~ 20kg increased 52.9 ~ 111.5kg / mu and net income 32.7 ~ 62.6 yuan / mu. At the same time, the highest yield of wheat and the best economic fertilizer were obtained