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Compound fertilizer refers to chemical fertilizers containing two or more nutrients. The compound fertilizer has the advantages of high nutrient content, less auxiliary components and good physical properties. It is very important for balanced fertilization, improving fertilizer utilization rate and promoting high yield and stable yield of crops. The role.

However, it also has some shortcomings, such as its nutrient ratio is always fixed, and the types, quantities and proportions of nutrients required for different soils and different crops are diverse. Therefore, it is best to conduct soil testing before use to understand the texture and nutritional status of the soil in the field, and also pay attention to the application with unit fertilizer to get better results.

nutrient

The total nutrient content of the compound fertilizer is generally high, and there are many nutrient elements. The compound fertilizer is applied at one time, and at least two main nutrients of the crop can be supplied at the same time.

Uniform structure

For example, ammonium phosphate does not contain any useless by-products, and its anion and cation are the main nutrients absorbed by crops. The nutrient distribution of this fertilizer is relatively uniform. Compared with the powdery or crystalline unit fertilizer, the structure is tight, the nutrient release is uniform, and the fertilizer effect is stable and long. Due to the small amount of sub-components, the adverse effect on the soil is small.

Good physical properties

The compound fertilizer is generally made into granules, has low hygroscopicity, is not easy to agglomerate, is convenient for storage and application, and is particularly convenient for mechanized fertilization.

Storage and packaging

Since the compound fertilizer has less side components and the active ingredient content is generally higher than that of the unit fertilizer, it can save packaging, storage and transportation costs. For example, each storage of 1 ton of ammonium phosphate is equivalent to about 4 tons of superphosphate and ammonium sulphate.