Three problems to be paid attention to when applying compound fertilizer

The compound fertilizer has comprehensive nutrient content, high content and good physical properties. However, in the application process, three problems should be paid attention to: First, the variety of compound fertilizer is selected for the crop due to the soil, and only in this way can the fertilizer effect be exerted. Grain crops such as rice, wheat and corn require more nitrogen fertilizer, and nitrogen and phosphorus compound fertilizers can be used. Legume crops can fix free nitrogen in the air, and phosphorus-potassium compound fertilizer can be used. Some cash crops can be used with local soil and climate. A ternary or multi-component compound fertilizer with suitable conditions. Second, the compound fertilizer should be applied in combination with the single fertilizer. The nutrients in the compound fertilizer are fixed, and only when combined with various elemental fertilizers can meet the nutrient requirements of the crop at different times. In general, the composite is suitable as a base fertilizer, and the simple fertilizer can be applied as a top dressing to the peak and critical period of crop fertilizer. Third, we must do the right thing. In various compound fertilizers, the proportion and form of various nutrients are different. In addition to soil and crop types, the method of fertilization should not be the same, and should be treated differently. The viscous soil should be applied in deep application, and the sandy soil is easy to be de-fertilized. It can be applied in small amounts. For composite fertilizers containing ammonium nitrogen, deep application of soil should be carried out to reduce losses. Compound fertilizers containing phosphorus and potassium nutrients should be applied centrally and applied near the root system to avoid nutrient fixation and facilitate crop absorption and utilization; Expensive potassium dihydrogen phosphate, generally should not be used as a base fertilizer, but suitable for external fertilizer or for soaking seeds

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