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在黄豆开花前和结荚后的灌浆期2次喷施磷酸二氢钾可提高产量20%～30%。1.喷施期在开花前的5～7d 或初花期喷第1次;在结荚后的灌浆期喷施第2次。2.方法和用量用背负式喷雾器喷施。密植黄豆第1次用0.3kg/亩磷酸二氢钾兑水60kg,第2次用0.4kg/
Spraying the pot before and after the pod 2 times spraying potassium dihydrogen phosphate can increase the yield of 20% to 30%. 1. Spraying period before flowering 5 ~ 7d or flowering spray the first time; in the pod filling period spraying the second time. 2. Methods and dosage sprays with a knapsack. Densified soy first 0.3kg / mu potassium dihydrogen phosphate watered 60kg, the second with 0.4kg /