1, water-soluble phosphate fertilizer: water-soluble phosphate fertilizer refers to ordinary superphosphate, calcium phosphate, such as monoammonium phosphate, diammonium phosphate and so on.The main ingredient contained in it is monocalcium phosphate, which is more soluble in water and has a faster fertilizer effect.It is usually used in various soils and crops.But is more recommend for calcareous soils and neutral soil.
2, citric acid soluble phosphate fertilizer: It refers to calcium magnesium phosphate fertilizer, precipitated phosphate fertilizer, calcium bisulfate, etc., which is the main component of dicalcium phosphate.Its fertilizer effect is slower than the first one, and it is more suitable for acid soil because of the different soil environment.
3, insoluble phosphate fertilizer: common is bone meal, phosphate rock powder, its main component is tricalcium phosphate.Suitable for strong acid soil, insoluble in water.After application, it can only be dissolved with the help of acidity in the soil and become a form that can be used by crops and plants.Its fertilizer effect is slow, but its after-effect is long, so it is suitable for base fertilizer in acid soil.
The role of phosphate fertilizer is mainly reflected in four aspects.First, it can promote the respiration of crops, as well as the absorption of nutrients and water, thus improving the efficiency of water use and short-term drought resistance.Secondly, it can promote the metabolism of protein, carbohydrate and fat in crops, thus promoting the earlier maturity of crops.Third, it can promote cell division, thus accelerating root growth.Fourth, it can enhance the stress resistance of crops, especially drought resistance, cold resistance and disease resistance.
