Urgent! What kind of phosphate fertilizer is suitable for drip irrigation? Thanks in advance! ! !

Phosphate fertilizer used in drip irrigation system must be completely soluble in water. Traditional phosphate fertilizer, such as calcium superphosphate, is mainly composed of water-soluble calcium dihydrogen phosphate, but there are other insoluble impurities, which are not suitable for drip irrigation system.

Monoammonium phosphate, diammonium phosphate, potassium dihydrogen phosphate and phosphoric acid are completely soluble and are good sources of nitrogen, phosphorus and potassium fertilizer. However, pure potassium dihydrogen phosphate is too expensive for ordinary farmers to accept. Although phosphoric acid has high phosphorus content and good solubility, it is corrosive, low in safety, prone to accidents during operation and high in management requirements, so it has not been popularized in China. Industrial monoammonium phosphate and diammonium phosphate have good water solubility and few impurities, and can be used for fertilization in drip irrigation system.

For example, Kading in Mengbang, Hebei Province, Guyu Dissolved Fertilizer, and Fangrun in Fangdian, Shanghai.