近年来,随着农业生产的发展、复种指数的提高、氮磷化肥施用量的增加,钾肥的增产作用愈来愈明显,施用钾肥已成为一项极为重要的农业增产措施;但在目前钾肥资源有限条件下,弄清土壤供钾状况,把钾肥施用到最需要的土壤和作物上,对提高钾肥利用率和发挥现有钾肥更大的增产效用,都有现实 In recent years, with the development of agricultural production, the improvement of multiple cropping index, the increase of the application amount of nitrogen and phosphorus fertilizer, the increasing effect of potash fertilizer becomes more and more obvious. The application of potash fertilizer has become an extremely important agricultural stimulation measure; Under limited conditions, clarifying the status of potassium supply to the soil and applying potassium fertilizer to the soil and crops most in need have the potential to increase the rate of potash utilization and maximize the productivity of existing potash fertilizer