Prevents fertilizers from couping

Fertilizers have an "association" relationship, and there are also contradictions. If more phosphate fertilizers are applied, the excess available phosphorus combines with the available zinc in the soil to form insoluble zinc phosphate precipitates, causing a lack of effective zinc in the soil. Not only that, the excess available phosphorus also inhibits the absorption of nitrogen by crops and causes nitrogen deficiency. For example, if more potassium is used, excess potassium will reduce crops' absorption of nitrogen, magnesium, calcium, boron, and zinc, causing the lack of these nutrients in crops. In addition, even organic fertilizers cannot be used excessively.

To prevent "grossing" between fertilizers, the following methods can be used:

1. Balance fertilization as much as possible. The partial application of multiple fertilizers to crops not only causes waste, increases production costs, but also easily leads to the lack of other certain or certain nutrient elements. When fertilizing, it is necessary to calculate the amount of fertilizer according to the difference in the structure of the fertilizer needed for crops and the fertility of the soil.

2. According to the proportion of crops to various nutrient elements needs to increase with the increase, to reduce the same reduction. Relative to simple fertilizers, the proportions of nutrients in compound fertilizers or compound fertilizers are more appropriate and coordinated. Therefore, fertilizers should be dominated by compound fertilizers, supplemented by simple fertilizers. For crops requiring high potassium, such as tubers and roots, the amount of potassium needed for crops can be appropriately increased based on the application of sulfur-based compound fertilizers. Potassium sulfate is a simple fertilizer.

3. Stagger the application period or application site. If zinc fertilizers and phosphorus fertilizers are mixed, they will inevitably produce "gross phase." Therefore, phosphate fertilizer should be used as base fertilizer or basal fertilizer, and zinc fertilizer should be used as top dressing. Nitrogen, phosphorus, potassium and other macronutrient fertilizers should be dominated by rhizosphere topdressing, and microfertilizers should be foliar sprayed.

4. Reduce the contact area. Nitrogen and potassium fertilizers can be used as a method of application; phosphate fertilizer can be used as a method of concentrated fertilization; micro-fertilizers can be used for seed dressing, soaking, and dipping roots, so that trace elements are confined to this small area of ​​the root and are not as large as possible. Elemental contact.

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