钾是水稻生长发育不可缺少的重要元素之一。土壤能否保证钾素供应对水稻产量有很大响影。我国南方不少地区近年来的研究结果表明,随着复种指数和单位面积产量的不断提高,土壤中钾的消耗不断增加,原来认为不缺钾的地区,土壤钾素也不能满足水稻生长发育的要求。施用钾肥越来越成为夺取水稻高产的一项重要措施。 Potassium is one of the most important elements of rice growth and development. Whether the soil can guarantee the supply of potassium has a great impact on the yield of rice. The results of recent years in many areas of southern China show that with the increase of multiple-cropping index and yield per unit area, the consumption of potassium in the soil is increasing. In the areas where potassium deficiency is not considered, the soil potassium can not satisfy the growth and development of rice Claim. Potash fertilizer is increasingly becoming an important measure to seize high yield of rice.