Monoammonium phosphate (MAP) is a water-soluble quick-acting compound fertilizer, the ratio of effective phosphorus (AP2O5) to total nitrogen (TN) content is about 5.44:1, which is one of the main varieties of high-concentration phosphorus fertilizer. The product is generally used as follow-up fertilizer, but also the production of ternary compound fertilizer, BB fertilizer is the most important basic raw materials; the product is widely used in rice, wheat, corn, sorghum, cotton, melons, fruits, vegetables and other food crops and cash crops; widely used in red soil, loam, brown soil, yellow tidal soil, black soil, brown soil, purple soil, white slurry soil and other kinds of soils.