1 注意叶面用肥的种类、浓度 可用于叶面喷施的氮肥有尿素、硝酸铵、磷酸铵,其中以尿素最为常用。施用尿素水溶液浓度为0.3％～0.5％,以不超过0.5％为宜,硝酸铵的水溶液浓度为0.1％～0.3％,磷酸铵的水溶液浓度为0.3％～0.5％;可用于叶面喷肥的磷钾肥有过磷酸 1 Note the type of foliar fertilizer, the concentration can be used for foliar spray urea nitrogen, ammonium nitrate, ammonium phosphate, of which urea is most commonly used. The concentration of aqueous urea solution is 0.3% ~ 0.5%, preferably not more than 0.5%, the concentration of ammonium nitrate in aqueous solution is 0.1% ~ 0.3% and the concentration of ammonium phosphate in aqueous solution is 0.3% ~ 0.5% P and K have over phosphoric acid