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磷酸二氢钾(KH_2PO_4)是速效性的氮磷复合肥料。纯品为白色结晶,养分含量:理论值P_2O_552.2％,K_2O34.5％,肥料用的一般含P_2O_550％,K_2O30％左右。易溶于水。呈酸性反应,pH值为3—4。磷酸二氢钾目前多用于叶面喷施(或称根外追肥)和浸种。一、叶面喷施试验证明作物除根部能吸收养分外,叶子也能吸收养分。但叶子吸收养分受很多因素影响,如肥料液浓度、溶液与叶片接触时间长短等等。应注意的是叶面喷施只是对作物施肥的一种辅助方法。叶面喷施对棉花、小麦、水稻等作物均有较好的效果。
Potassium dihydrogen phosphate (KH_2PO_4) is a quick-acting nitrogen-phosphorus compound fertilizer. Pure product is white crystal, nutrient content: the theoretical value of P_2O_552.2%, K_2O34.5%, with fertilizer generally containing P_2O_550%, K_2O30% or so. soluble in water. Acidic reaction, pH 3-4. Potassium dihydrogen phosphate is currently used for foliar spray (or root top dressing) and soaking. First, the foliar spray test shows that the crop can absorb nutrients in addition to the roots, the leaves can absorb nutrients. However, the nutrients absorbed by leaves are affected by many factors, such as the concentration of fertilizer solution, the contact time between the solution and the leaves, and the like. It should be noted that foliar application is just an adjunct to fertilizing the crop. Foliar spray on cotton, wheat, rice and other crops have a good effect.