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First, the application of zinc fertilizer should vary from place to place, depending on the crop, and should not be applied blindly. The application of zinc fertilizer to zinc-deficient plots and crops that are more sensitive to zinc has a better effect. In general, when the soil effective zinc content is less than 0.5 mg / kg, the application of zinc fertilizer has a significant effect on increasing yield; when the soil effective zinc content is higher than 1.0 mg / kg, it is generally unnecessary to apply zinc fertilizer. Zinc-sensitive crops include corn, sorghum, soybeans, cotton, tomatoes, potatoes, and onions, and special attention should be paid to the application of zinc fertilizer.
Second, zinc fertilizer is micro-fertilizer, and crops require less of it. Excessive application of zinc fertilizer has a toxic effect on crops or affects human and animal health. When zinc fertilizer is used as the base fertilizer, according to the degree of zinc deficiency in the soil, 0.5-2 kg of zinc sulfate is generally applied per mu. For topdressing, use 0.75-1 kg of zinc sulfate per acre to mix with appropriate amount of fine soil; spray outside the root, apply 90-180 g of zinc sulfate per acre to 60 kg of water on a sunny day.
Third, do not apply with phosphate fertilizer at the same time. Due to the mixed application of zinc and phosphate fertilizer, it is easy to form zinc phosphate precipitate, which not only reduces the effectiveness of zinc, but also reduces the effectiveness of phosphate fertilizer.
Fourth, do not mix with alkaline fertilizers and alkaline pesticides. The zinc fertilizer is mixed with alkaline fertilizers such as lime, grass ash and ammonia water, and the acidic ions react with the alkaline ions to reduce the fertilizer efficiency. Similarly, zinc fertilizer is mixed with alkaline pesticides such as Bordeaux mixture, stone sulphur mixture and rosin mixture, and the effectiveness of zinc and pesticides decreases.
In addition, zinc fertilizer has an aftereffect and does not need to be applied for several years. Generally, the application effect is better every other year.
Second, zinc fertilizer is micro-fertilizer, and crops require less of it. Excessive application of zinc fertilizer has a toxic effect on crops or affects human and animal health. When zinc fertilizer is used as the base fertilizer, according to the degree of zinc deficiency in the soil, 0.5-2 kg of zinc sulfate is generally applied per mu. For topdressing, use 0.75-1 kg of zinc sulfate per acre to mix with appropriate amount of fine soil; spray outside the root, apply 90-180 g of zinc sulfate per acre to 60 kg of water on a sunny day.
Third, do not apply with phosphate fertilizer at the same time. Due to the mixed application of zinc and phosphate fertilizer, it is easy to form zinc phosphate precipitate, which not only reduces the effectiveness of zinc, but also reduces the effectiveness of phosphate fertilizer.
Fourth, do not mix with alkaline fertilizers and alkaline pesticides. The zinc fertilizer is mixed with alkaline fertilizers such as lime, grass ash and ammonia water, and the acidic ions react with the alkaline ions to reduce the fertilizer efficiency. Similarly, zinc fertilizer is mixed with alkaline pesticides such as Bordeaux mixture, stone sulphur mixture and rosin mixture, and the effectiveness of zinc and pesticides decreases.
In addition, zinc fertilizer has an aftereffect and does not need to be applied for several years. Generally, the application effect is better every other year.
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