Methods to improve the effect of compound fertilizer

As we all know, the nutrient content of compound fertilizer is complete, its physical properties are good and its use is convenient. However, the types and contents of nutrient elements contained in different compound fertilizers are different. In order to give full play to the effect of compound fertilizers, the following aspects should be considered when applying it.
Firstly, the nutrient form and composition of fertilizer should be considered: nitrogen is divided into ammonium nitrogen and nitrate nitrogen. Ammonium nitrogen is easy to be absorbed by the soil and is not easy to be lost. It can be applied in both dry land and paddy fields.The application of nitrate nitrogen in paddy fields is easy to lose with water flow and denitrification and denitrification.
Secondly, soil nutrient abundance and deficiency were considered: the area of potassium-deficient soil in the south of China was constantly expanding, while the effect of phosphate fertilizer was significant in most areas in the north.The soil in the south should be treated with binary compound fertilizer of nitrogen and potassium or ternary compound fertilizer of nitrogen, phosphorus and potassium, while the soil in the north should be treated with binary compound fertilizer of nitrogen and phosphorus.
Consider crop type even: mulberry, tea, vegetable and other crops that give priority to with stem leaf need more nitrogen, should choose high nitrogen compound fertilizer;Rapeseed, cotton and other crops which are mainly seed seeds need more phosphorus.
In addition, rotation method: in the rotation system of northern wheat and corn, wheat seedling stage is in the low-temperature growth stage, and is particularly sensitive to phosphorus deficiency, so high-phosphate compound fertilizer varieties should be selected.Because of the high temperature during the growth of summer maize, the phosphorus released from the soil is relatively large, so low phosphorus compound fertilizer varieties can be selected.