我场试用连云港市盐区化工厂生产的磷酸二氢钾晶体肥料80公斤,进行了水稻大面积中、后期叶面喷雾处理示范和小区施肥量、施肥时期试验。初步认为,磷酸二氢钾是水稻中、后期根外追肥较好的复合肥料,效果显著,一般比对照增产8.5％。我们在5个大队的中稻田里进行大田示范,用1:1,000的磷酸二氢钾液,于水稻拔节后和抽穗灌浆期做两次叶面喷洒,每亩每次用磷酸二氢钾2两。小区试验喷洒时期与大田示范相同,每亩分别用磷酸 My field trial Lianyungang Salt Chemical Plant production of potassium dihydrogen phosphate crystal fertilizer 80 kg, conducted a large area of ​​rice, the late leaf spray treatment demonstration and community fertilization, fertilization period test. It is preliminarily believed that potassium dihydrogen phosphate is a better compound fertilizer for topdressing in and out of rice in late rice, and the effect is remarkable, generally yielding 8.5% more than that of the control. We conducted field demonstration in mid-paddy fields of five brigades, using 1: 1,000 potassium dihydrogen phosphate solution, foliar spraying two times after jointing and heading stage of paddy rice, using 2-K 2 . Community test spray the same time and field demonstration, respectively, with phosphoric acid per acre