Effect of zinc fertilizer and reasonable application technology

Effect of zinc fertilizer and reasonable application technology

Zinc is also one of the trace elements necessary for crops. Zinc is concentrated in the young parts of the crop, the root tip, the growing point, and the first leaf on the top. Zinc is related to the formation of auxin and chlorophyll in the crop. It is also involved in the synthesis and transformation of sugar and also participates in the metabolism of nitrogen. According to the sensitivity of the crop response to zinc can be divided into three groups: (1) The most sensitive to zinc are corn, rice, peas, tomatoes, grapes, peaches, apples and so on. (2) Moderately sensitive to zinc are potatoes, beets, onions, soybeans, peanuts, and sorghum. (3) Wheat, barley, and carrots that are insensitive to zinc. The commonly used zinc fertilizer is zinc sulfate, containing zinc, with 23% crystal water, 23 fine crystals, soluble in water, near-neutral aqueous solution, moisture precautions during storage.
Application Techniques (1) Base Fertilizer Applying base fertilizer to zinc-deficient soil, the fertilizer effect lasts for 1 to 2 years. Generally, the dosage per acre is 0. 75 to 1 kg. Since the amount is small, zinc fertilizer can be incorporated into organic fertilizers or other fertilizers. The application, remember not to mix with phosphate fertilizer. (2) Seed fertilizer for soaking and seed dressing. Soak the seed with a concentration of 0. 02 to 0. 05 ZnSO 4 solution, immerse for 6 to 8 hours, remove and dry to sow. Seed dressing with 0:4 to 0:6 kg of zinc sulfate per 100 kg of seeds. The specific method is: 0.4 to 0.6 kg of zinc sulfate is fully dissolved with 4.5 to 5 kg of water and then sprayed on 100 kg of seed, mixed with spraying, and dried for use. (3) External spray foliar spraying, the general crop can be used 0.2% to 0.3% of zinc sulfate solution, each interval of 7 to 10 days, continuous spray 2 to 3 times, fruit trees generally use 0.2% sulfuric acid The zinc aqueous solution is sprayed after the leaves are opened, and it can also be combined with the spraying of drugs and chemicals. However, zinc sulfate cannot be mixed with lime sulfur mixture. It is also possible to use 3% zinc sulfate solution to brush one or two annual branches.

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