What is the nature of ammonium phosphate? How to apply?

Ammonium phosphate, abbreviated as ammonium phosphate, is a mixture of monoammonium phosphate and diammonium phosphate, which is a high-quality and high-concentration life fertilizer. Generally, it contains 14-18% of nitrogen and 46-50% of phosphorus (P2O5). Among them, monoammonium phosphate is acidic, pH 4.4, stable in nature; diammonium phosphate is alkaline, pH 8.0, and its properties are not very stable. It can decompose and absorb ammonia after moisture absorption. Ammonium phosphate is easily soluble in water and the aqueous solution is neutral. Most of the ammonium phosphate fertilizers are dark gray granules, which are not hygroscopic, but still have certain hygroscopicity. Therefore, it is necessary to pay attention to moisture prevention during storage and transportation.

Ammonium phosphate is a phosphorus-based nitrogen-phosphorus compound fertilizer suitable for various crops and various soils, especially suitable for crops with high phosphorus and phosphorus-deficient soil. It is most suitable for seed fertilizer and base fertilizer, and can also be used for early topdressing. If seeding, avoid contact with seeds to avoid affecting seed germination. The amount of fertilizer applied should be calculated according to the phosphoric acid (P2O5) in the fertilizer, and the insufficient nitrogen can be supplemented by the unit nitrogen fertilizer. For the seed fertilizer, generally use about 3 kg per mu, and 5 to 8 kg for the base fertilizer. The rice field should be applied as a base fertilizer for 10 to 15 kilograms per field, and should be turned into the soil after application. Ammonium phosphate has obvious yield-increasing effect. The effect of ammonium phosphate on corn, rice, wheat, peanut and soybean is better than that of applying ammonium and ammonium sulphate with equal amount of phosphorus, and for rapeseed, Chinese cabbage, sugar cane, Sweet potato, cotton and potato are less effective than unit nitrogen and phosphate.

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