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1. Seed treatment: soak each seed or seed dressing with 4~6g of zinc sulfate and appropriate amount of water per kilogram of corn seed.
2. Base application: 1~2 kg of zinc sulfate per acre is evenly applied before sowing. Because zinc fertilizer is difficult to move in the soil, zinc applied to the soil surface is generally ineffective to plants. It is better to mix the zinc fertilizer into the soil after applying the zinc fertilizer.
3, seed fertilizer: about 0.5 kg of zinc sulfate per mu with 10 ~ 15 kg of fine dry soil, the strip is applied to the seeding ditch, but it should not be in contact with the seed.
4. Spraying: 0.2% zinc sulphate solution can be sprayed in the corn seedling stage, jointing stage, big trumpet stage and heading stage, spraying about 50 kg per acre, but the spraying effect is better at seedling stage and jointing stage. . Foliar application is a good remedy for the presence of zinc deficiency in corn.
Zinc participates in the photosynthesis-related enzyme components in corn and directly affects the photosynthesis process. According to the test, zinc application in corn generally increases yield by 8% to 13%, and its application methods mainly include the following:
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