Zinc fertilizer five methods to prevent zinc deficiency in crops
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Roots of the roots are treated with zinc oxide (0.1% to 0.2% concentration), but the rooting time is not too long, usually 3 minutes. If the time is too long, it will cause phytotoxicity.
Soaking the seed The zinc sulfate is formulated into a solution of 0.02% to 0.05%. The seed and the soaking solution are preferably 1:1. After soaking for 6 to 12 hours, remove and dry (not to be exposed to sunlight, and should be dried in the shade).
Seed dressing Dissolve the zinc fertilizer with a small amount of water, and then dilute with water. When the seeds are mixed with zinc, the solution should not be too much. Finally, the whole solution can be sucked up.
Topdressing outside the roots 50-100 grams of zinc sulfate per acre, dissolved in water and then 50 kg of water, sprayed at 4 o'clock in the afternoon. In spraying, if the concentration is too large to damage the leaves, it is best to add 0.2% slaked lime to adjust the pH of the solution.