The first is to understand the symptoms of zinc deficiency in corn. The symptoms of zinc deficiency in maize are leaf chlorosis, clustering, lobular, internode shortening, plant dwarfness, and growth inhibition. When the corn seedlings are deficient in zinc, the white and yellow seedlings are formed in the middle and lower parts of the new leaves, which are also called white seedlings. The zinc deficiency after jointing is characterized by the appearance of yellowish-white streaks in the lower part of the leaves, which are translucent, like white silk or plastic film. Shape, wind easily tear, known as mosaic stripe disease or white stem blight. At the same time, it also showed that the plants were dwarfed, their ears were small, and they lacked grain and alopecia.
The second is scientific application: 1, base fertilizer, with 21.3% per hectare of heptahydrate 1-2kg mixed fine soil 10-15kg spread to the surface, and then plough into the soil.
2, top dressing, from the seedling stage to the jointing stage per hectare with zinc sulfate 1-2kg mixed fine soil 10-15kg or mixed with urea in the seedling stage - jointing stage for topdressing.
3, foliar spray fertilizer, with 0.2% zinc sulfate solution sprayed from the seedling stage to the jointing stage two times, spaced 7 days, each spray 45kg per acre. The spray concentration cannot be high, and it will be harmful if it exceeds 0.4%. Foliar spraying is an emergency method to find the symptoms of zinc deficiency in plants.
4, seed dressing, before sowing per kilogram of seed mixed with zinc sulfate 5-6 grams, first with a small amount of water to dissolve the zinc sulfate, sprayed on the seed, while spraying mixed.
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