我国现在生产使用的大多数化肥品种都是水溶性的,这些化肥施入土壤后,容易流失、分解或被固定,使养分利用率降低。据测定,目前我国化肥平均利用率仅为30～40%,其中,氮肥为30～50%,磷肥为10～25%,钾肥为40～70%。统计数据表明,我国年施肥总量已达4500万吨(折纯),如果全部采用包膜技术,可使化肥利用率提高15%左右,每年可 Most of the fertilizer varieties that are produced and used in our country are water-soluble. After these fertilizers are applied to the soil, they are easy to be lost, decomposed or fixed, and the utilization rate of nutrients is reduced. According to the determination, the average utilization rate of chemical fertilizers in China is only 30-40%, among which, nitrogenous fertilizer is 30-50%, phosphate fertilizer is 10-25%, and potassium fertilizer is 40-70%. Statistics show that the total amount of fertilizers in China has reached 45 million tons (pure), if all the use of coating technology, fertilizer utilization can be increased by about 15%, each year