桐城农地土壤钾素状况及其对策宋传俊（安徽省桐城市土肥站２３１４０１）随着种植业结构的调整，农作物产量和复种指数的不断提高以及氮磷化肥施用量的增加，有机肥施用量相对减少，钾素没有得到及时归还补充，致使土壤中的钾素含量严重下降。已成为制约我市“两高一优”... Status and Countermeasures of Potassium in Soil of Tongcheng Farmland Song Chuanjun (Soil and Fertilizer Station, Tongcheng, Anhui Province 231401) With the adjustment of planting structure, the continuous increase of crop yield and multiple cropping index and the increase of application rate of nitrogen and phosphorus fertilizers, Reduce, potassium did not get timely replenishment, resulting in a serious decline in soil potassium. Has become a constraint to our city “two high and one excellent” ...