钾肥是杂交中稻生产上常用的三大肥料之一，无论是作为方肥施用，还是用于叶面喷施，用量都较大。常用的钾肥主要是氯化钾、硫酸钾和 KH2PO4等无机钾肥，但这些钾肥长期使用会给土壤、环境带来不利影响：如用于叶面喷施，浓度稍大或喷施量大，又易产生“烧苗”。所以，有必要 Potash fertilizer is one of the three major fertilizer commonly used in hybrid rice production. Whether it is applied as a fertilizer or foliar spray, the amount of potassium fertilizer is larger. Commonly used potassium is mainly potassium chloride, potassium sulfate and KH2PO4 and other inorganic potash, but the long-term use of these potash will give the soil, the environment adversely affect: If used for foliar spray, the concentration of a little larger or spray volume, and Easy to produce “burn seedlings.” So, it is necessary