钾是作物中多种酶的活化剂。施用钾肥后,叶绿素含量及光合作用效率都能有所提高,可以弥补由于阴雨天气光照不足而引起的减产状况。钾对作物体中碳水化合物的形成和转移,以及与蛋白质合成的关系,都十分密切。在三要素养分平衡关系中,在一定范围内,钾不仅能消除氮素过多的影响,也能消除磷肥过多造成作物过早成熟的影响。目前钾肥供应比较紧缺,合理施用钾肥,提 Potassium is a crop activator of many enzymes. After the application of potassium fertilizer, chlorophyll content and photosynthesis efficiency can be increased, can compensate for the rainy season due to lack of light caused by the reduction of production conditions. Potassium carbohydrate formation and transfer of crops, and the relationship between protein synthesis, are very close. In the three elements of the nutrient balance, within a certain range, potassium can not only eliminate the impact of excessive nitrogen, but also eliminate excess phosphorus caused by crop premature effects. The current shortage of potash supply, rational use of potash, mention