磷酸二氢钾是一种含有磷和钾的高效复合肥料,除可用来浸种和拌种外,目前一般多用于根外追肥,适用于各种土壤和多种作物。叶面喷施磷酸二氢钾,作为通过叶片直接吸收肥液,既能促进作物生长发育,又能增强作物抗倒伏、抗寒和抗病虫害的能力。据试验,水稻叶面喷施磷酸二氢钾可增产10％以上。磷酸二氢钾使用浓度一般不宜大于0.3％。水稻在生长季节一般可喷施两次,第一次在刚破口现德时,第二次在灌浆时。每亩每次用磷酸二氢钾 Potassium dihydrogen phosphate is a high-efficiency compound fertilizer containing phosphorus and potassium, which can be used for soaking seeds and dressing seeds. It is currently used mostly for root top dressing and is suitable for various soils and various crops. Foliar application of potassium dihydrogen phosphate, as a direct absorption of fertilizer through the leaves, both to promote crop growth and development, but also enhance the crop lodging, cold and pest resistance. According to the test, spraying potassium dihydrogen phosphate on the foliage of rice can increase yield by more than 10%. The concentration of potassium dihydrogen phosphate in general should not be greater than 0.3%. Rice in the growing season can be sprayed twice in general, the first time just breaking Germany, the second time in the grouting. Each use of potassium dihydrogen phosphate per acre