There is a "synergy" relationship between the fertilizers, and there is also a contradiction between the "phases". For example, if more phosphorus is 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. Another example is the application of potassium fertilizer. 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 microorganisms in the soil and the crops will have the contradiction between “striving nitrogen†and “taking nitrogenâ€, causing the soil to temporarily be deficient in nitrogen for a period of time, and the excess organic matter forms a complex or chelate with zinc, which will reduce zinc. Effectiveness. To prevent "community" between fertilizers, the following methods can be used:
Balanced fertilization as much as possible There are still some farmers who apply partial or multiple fertilizers to crops, which not only wastes fertilizer, increases production costs, but also leads to the lack of other nutrients. When fertilizing, according to the different fertilizer structure of the crops and the fertility of the soil, we must measure the quantity, not too much, and strive to balance the nutrients, so that we can have peace of mind. In addition, according to the proportion of the demand for various nutrients in different crops, it is necessary to increase and increase, and reduce and decrease. Relative to elemental fertilizers, the proportion of nutrients in compound fertilizers or compound fertilizers is more appropriate and coordinated. Therefore, when applying fertilizer, compound fertilizer should be mainly used, supplemented by elemental fertilizer. For crops with large potassium content such as vegetables with tubers and roots, it can be increased based on the application of sulfur-based compound fertilizer. Potassium sulfate fertilizer is used as a supplement.
Staggered application period or application site Zinc and phosphate fertilizers will inevitably produce “phase grams†if mixed. Therefore, the phosphate fertilizer should be applied as a base fertilizer or a base fertilizer, and the zinc fertilizer should be applied as a top dressing. Nitrogen, phosphorus, potassium and other large-scale element fertilizers should be based on rhizosphere top dressing, and micro-fertilizer should adopt foliar spray method.
Narrowing contact range Nitrogen and potassium fertilizers can be applied by means of spreading. Phosphate fertilizer can be applied by concentrated fertilization. Micro-fertilizer can be used for seed dressing, soaking seeds, rooting, etc., so that trace elements are confined to the smaller part of the roots. Not in contact with a large number of elements.
Balanced fertilization as much as possible There are still some farmers who apply partial or multiple fertilizers to crops, which not only wastes fertilizer, increases production costs, but also leads to the lack of other nutrients. When fertilizing, according to the different fertilizer structure of the crops and the fertility of the soil, we must measure the quantity, not too much, and strive to balance the nutrients, so that we can have peace of mind. In addition, according to the proportion of the demand for various nutrients in different crops, it is necessary to increase and increase, and reduce and decrease. Relative to elemental fertilizers, the proportion of nutrients in compound fertilizers or compound fertilizers is more appropriate and coordinated. Therefore, when applying fertilizer, compound fertilizer should be mainly used, supplemented by elemental fertilizer. For crops with large potassium content such as vegetables with tubers and roots, it can be increased based on the application of sulfur-based compound fertilizer. Potassium sulfate fertilizer is used as a supplement.
Staggered application period or application site Zinc and phosphate fertilizers will inevitably produce “phase grams†if mixed. Therefore, the phosphate fertilizer should be applied as a base fertilizer or a base fertilizer, and the zinc fertilizer should be applied as a top dressing. Nitrogen, phosphorus, potassium and other large-scale element fertilizers should be based on rhizosphere top dressing, and micro-fertilizer should adopt foliar spray method.
Narrowing contact range Nitrogen and potassium fertilizers can be applied by means of spreading. Phosphate fertilizer can be applied by concentrated fertilization. Micro-fertilizer can be used for seed dressing, soaking seeds, rooting, etc., so that trace elements are confined to the smaller part of the roots. Not in contact with a large number of elements.
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