When wheat is deficient in zinc, the plants are dwarfed and the leaf margins are distorted or shrunk. The veins turn from green to yellow on both sides of the veins, and yellow, white and green stripes appear on the edges. Zinc fertilizer is mostly applied with zinc sulfate. Zinc sulfate is white or light orange-red crystal, soluble in water, zinc content is 24%; while zinc chloride is white crystal and insoluble in water. Zinc sulphate is generally used as a seed dressing, soaking, dipping root or top dressing, but also for top dressing and basal dressing. From the perspective of economic benefits, spraying, dipping and dressing are effective. When zinc sulphate is sprayed or soaked, the general concentration is 0.02%~0.1%, and the seed dressing dosage is 2~6g zinc fertilizer per kilogram of seeds, and must be mixed with calcium, magnesium, phosphate fertilizer and other fertilizers before sowing; as base fertilizer, 1 kg to 2.5 kg per 667 square meters, applied to the soil at the time of site preparation. For top dressing, 1 kg of zinc sulfate per 667 square meters, 15 to 20 kg of fine dry earth or organic fertilizer, and ditching at the wheat seedling stage. Between the lines.
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