Zinc in soil is the most commonly used method. Spreading and applying all can be applied. When spreading, it is necessary to combine cultivating. Before sowing or transplanting, it is the best time to apply zinc to the soil. Generally, about 1.5-5.0 kg of zinc sulfate is applied per acre. Foliage spraying is suitable for fruit trees and vegetables, but it is an emergency measure when the crop suffers from symptoms of zinc deficiency. It is suitable for the early stage of crop growth, and the concentration is generally 0.05%-0.1% of zinc sulfate, and fruit trees can use 0.5% zinc sulfate solution; Seed treatment can be used 0.1% zinc sulfate solution soaked or used as rice, cotton and other seed coating; and 2% -4% zinc oxide suspension is a cost-effective method. The residual effect of zinc in the soil is generally 3-5 years. It is decided whether or not to apply zinc fertilizer according to the soil and plant analysis results.
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