We all know that there are laws in the biological world. There is also a relationship between "community" and "phase" between various fertilizers. For example, if multiple phosphates are applied, the excess available phosphorus combines with the effective zinc in the soil to form a poorly soluble zinc phosphate precipitate, which causes a lack of effective zinc in the soil. Not only that, excess available phosphorus also inhibits crop nitrogen uptake and causes nitrogen deficiency. For example, if more potassium is applied, excess potassium will reduce the absorption of nitrogen, magnesium, calcium, boron and zinc by crops, causing the lack of these nutrients in crops. Even organic fertilizers should not be applied too much. If the application is too much, the microbes and crops in the soil will have the contradiction between “striving nitrogen†and “taking nitrogenâ€, causing the soil to temporarily lack nitrogen for a period of time, and the excess organic matter forms a complex or chelate with zinc, which will reduce zinc. Effectiveness. So what kind of method should we use to prevent the phenomenon of fertilizer "phase"?
1. Balance fertilization as much as possible. Partial application or multi-application of fertilizers on crops not only wastes fertilizer, increases production costs, but also leads to the lack of some other nutrients. When fertilizing, it is necessary to measure the difference between the nutrient elements of the crops and the fertilization capacity of the soil, and do not favor a lot of nutrients, so that the balance between nutrients can be achieved.
2. Pay attention to the proportional relationship of demand. To increase the same increase, it is necessary to reduce the same amount. Relative to elemental fertilizers, the proportion of nutrients in compound fertilizers or compound fertilizers is more appropriate and coordinated. Therefore, fertilization should be based on compound fertilizer, supplemented by elemental fertilizer. For crops with large potassium content, such as vegetables with tubers and roots, can be appropriately increased on the basis of application of sulfur-based compound fertilizer. Potassium sulfate fertilizer is used as a supplement.
3. Stagger the application period or application site. If zinc fertilizer and phosphate fertilizer are mixed, it will inevitably produce "phase grams." Therefore, phosphate fertilizer should be applied as base fertilizer or base fertilizer, and zinc fertilizer should be applied as top dressing. Nitrogen, phosphorus, potassium and other large-scale elemental fertilizers should be based on rhizosphere topdressing, and micro-fertilizer should adopt foliar application.
4. Reduce the contact range. Nitrogen and potassium fertilizers can be applied by means of spreading; phosphate fertilizers can be applied by concentrated fertilization; micro-fertilizers can be used for seed dressing, soaking seeds, rooting, etc., so that trace elements are confined to the smaller part of the roots, and try not to Elemental contact.
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