Compound fertilizer is a kind of chemical fertilizer which contains two or more kinds of nutrient elements. Compound fertilizer is used in agricultural production, and contains high nutrient content, many kinds of nutrient elements and few by-products. It has no toxicity to crop or soil, and has good physical and chemical properties. Compound fertilizer releases uniform nutrient with stable and durable effect. Compound fertilizer plays an important role in balanced fertilization, improving fertilizer utilization rate and achieving high and stable yield of crops.
In general, the total content of compound fertilizer is relatively high, and there are many kinds of nutrient elements. One application of compound fertilizer can at least supply more than two main nutrient elements for crops at the same time. It has small hygroscopicity, is not easy to agglomerate, and is easy for storage and application, especially for mechanized fertilization.
It contains many kinds of nutrients, such as nitrogen, phosphorus, potassium and so on. The crops in the early stage are particularly sensitive to phosphorus and potassium. Therefore, the phosphate fertilizer and potassic fertilizer should be applied as base fertilizer. Compound fertilizer should not be used in seedling stage or late stage, to prevent excessive green.