According to the local soil characteristics, the suitable compound fertilizer should be purchased. For the farmers who are located in the alkaline soil in the north, the acid compound fertilizer should be purchased. On the contrary, the alkaline compound fertilizer should be used for the farmers in the southern acid soil. For soils with low organic matter content, it is generally possible to add organic compound fertilizer or organic-inorganic compound fertilizer.
Purchasing compound fertilizer according to the variety of crops For the field crops, nitrogen, phosphorus and potassium ternary compound fertilizers should generally be used. For economic crops such as vegetables and fruit trees, especially root crops, more potassium is needed, and potassium should be used. High NPK ternary compound fertilizer; for chlorine-free crops such as grapes, potatoes, sugar beets, etc., it is not suitable to apply compound fertilizer with high chloride ion content produced by using potassium chloride or ammonium chloride as raw materials.
According to the nature of fertilizers, you should learn more about the common sense of fertilizers when purchasing compound fertilizers. It is convenient for you to buy fertilizers. For example, GB15063-2001 national standard stipulates that the effective nutrient content of compound fertilizer (composite fertilizer) is divided into high, medium and low: high concentration of nitrogen, phosphorus and potassium content ≥ 40%, medium concentration of NPK content ≥ 30%, low concentration The content of NPK is ≥25%, excluding trace elements and medium elements; water-soluble phosphorus content is ≥40%. The nutrient content is different, the quantity applied and the technical requirements are different, of course, the price is different.
According to the fertilization method, the compound fertilizer is purchased to improve the fertilizer efficiency of the compound fertilizer, and different compound fertilizers should be selected for different fertilization methods. If it is used as a base fertilizer, it is necessary to purchase granular compound fertilizer, or to purchase a compound fertilizer containing slow-release fertilizer, which has a long fertilizer effect and is beneficial to increase the utilization rate of nitrogen. The effect of humic acid compound fertilizer is generally better than that of topdressing.
According to the principle of balanced fertilization, it is necessary to contact the agricultural technicians to understand the soil characteristics and the fertilizer requirements of the crops. It is best to combine with the soil testing and formula fertilization. According to the principle of balanced crop nutrition, the soil testing results are reasonable. Formula, what is missing, to achieve a balanced supply of crop nutrients. In addition, the compound fertilizer is relatively fixed, and must not be blindly selected and applied, nor can it be applied as a single fertilizer to avoid unnecessary loss and waste.
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