施钾是补充土壤钾的有效途径。据近几年我市土壤养分状况调查，土壤速效钾（Ｋ２Ｏ下同）含量低于６０ｍｇ／ｋｇ的面积达２８２１０ｈｍ２，钾的缺乏限制农作物产量的提高。为此，１９９６年在我市南部高沙土农业区就水稻施用氯化钾的增产效果进行了试验研究。１材料和方法１ Potassium is an effective way to replenish soil potassium. According to the investigation of soil nutrient status of our city in recent years, the area of ​​available K (below the same K2O content) of 60mg / kg is 28210hm2. The lack of potassium limits the increase of crop yield. To this end, in 1996 in the southern city of sand high agricultural soil area on the application of potassium chloride yield test results. 1 Materials and methods 1