1、 Types of phosphate fertilizer

1. Ammonium phosphate refers to water-soluble calcium phosphate, such as ammonium superphosphate. The main component contained in it is monocalcium phosphate, which is more soluble in water and has faster fertilizer effect. It is usually used in various soils and crops. But it is more recommended to use in calcareous soil and neutral soil

2. Medlar soluble phosphate fertilizer: it refers to calcium magnesium phosphate fertilizer, precipitated phosphate fertilizer, calcium bisulfate, etc. the main component is dicalcium phosphate. Its fertilizer efficiency is slower than the first one, and the soil environment is different, so it is more suitable for acidic soil

3. Insoluble phosphate fertilizer: bone powder and phosphate rock powder are common, and its main component is tricalcium phosphate. It is suitable for strongly acidic soil and insoluble in water. After application, it can only be dissolved with the help of acid in the soil and become a form that can be used by crops and plants. Its fertilizer effect is slow, but its aftereffect is long. It is suitable for making base fertilizer in acidic soil

2、 Function of phosphate fertilizer

The role of phosphate fertilizer is mainly reflected in four aspects. First, it can promote the respiration of crops and the absorption of nutrients and water, so as to improve the water use efficiency and short-term drought resistance. Second, it can promote the metabolism of protein, carbohydrate and fat in crops, which can promote crops to mature earlier. Third, it can promote cell division and accelerate root growth. Fourth, it can enhance the stress resistance of crops, especially drought resistance, cold resistance and disease resistance