钾是植物生长不可缺少的重要养分之一.但钾的一个很独特的性质是,它不是植物细胞内有机化合物的组成成分,可是植物体内进行的一切生物化学反应几乎都有它参与.钾能活化六十多种酶,这些酶直接或间接地参与了蛋白质的合成和低分子量碳水化合物的缩合;钾能促进光合作用;钾还能增进同化物的迁移;能提高根压,增强作物的吸水能力等等.我国历来有施用有机肥的习惯,化学氮、磷肥的施用水平很低,所以钾素营养问题并不突出.近年来,随着农业生产的发展,复种指数的提高,氮、磷肥用量不断增加,因而土壤钾素供应不足就日趋严重,特别是南方红壤地区,缺钾问题更为突出,它已严重地影响到农业生产的发展.应该强调的是,一般 Potassium is one of the important nutrients essential for plant growth, but a very unique property of potassium is that it is not an integral part of organic compounds in plant cells, but almost all biochemical reactions in plants take place. Activation of more than sixty enzymes, these enzymes directly or indirectly involved in the protein synthesis and low molecular weight carbohydrate condensation; potassium can promote photosynthesis; potassium can also promote the assimilation of migration; can increase the root pressure and enhance water absorption Ability, etc. China has always been the habit of using organic fertilizer, chemical nitrogen, phosphate fertilizer application level is very low, so the problem of potassium nutrition is not prominent.In recent years, with the development of agricultural production, crop improvement index, nitrogen and phosphate fertilizer The amount of soil potassium supply becomes more and more serious, especially in the red soil area of ​​South China, the problem of potassium deficiency is more prominent, which has seriously affected the development of agricultural production .It should be emphasized that the general