How to use zinc sulphate?
First, the use of base fertilizer:
Zinc sulphate can be used as a base fertilizer for corn, wheat, cotton, rape, sweet potato, soybean, peanut and other dryland crops. Generally, 1 to 2 kg of zinc sulfate per acre, 10 to 15 kg of dry fine soil, after thorough mixing, evenly Sprinkle it on the surface and then plow it into the soil. It can also be applied or applied. The use of vegetables is 2 to 4 kg of zinc sulfate per acre.
How to use zinc sulfate
Second, foliar application:
1. Fruit trees: Spray 3%~5% zinc sulphate solution one month before germination in early spring. The spraying concentration after germination should be reduced to 1%~2%, or brushed with 2%~3% zinc sulphate solution for one year. The branches are 1~2 times.
2, vegetables: foliar spray application of concentration of 0.05% ~ 0.1% zinc sulfate solution, spraying in the early stage of vegetable growth is better, each interval of 7 days, continuous spraying 2~3 times, each time per mu Spray 50~75 kg of solution.
How to use zinc sulfate
Third, soaking seeds:
The zinc sulfate is formulated into a solution having a concentration of 0.02% to 0.05%, and the seed is poured into the solution, and the solution is generally submerged by the solution. For rice soaking, a 0.1% zinc sulphate solution was used. The rice seeds were first immersed in water for 1 hour, then placed in a zinc sulphate solution, and the early and middle rice seeds were immersed for 48 hours, and the late rice seeds were immersed for 24 hours. Corn seeds are soaked in 0.02%~0.05% zinc sulphate solution for 6-8 hours, and then sown. Wheat seeds were soaked in a 0.05% zinc sulphate solution for 12 hours, and then sown for seeding.
How to use zinc sulfate
Fourth, the use of seed dressing:
Each kilogram of seed is treated with 2 to 3 grams of zinc sulfate, dissolved in a small amount of water, sprayed on the seeds, and stirred while spraying. The amount of water can be mixed with the seeds, and the seeds can be sown after being dried.
Zinc sulfate use precautions
Precautions for the use of zinc sulfate:
1. Zinc sulfate should not be mixed with phosphate fertilizer such as superphosphate, heavy superphosphate, diammonium phosphate and potassium dihydrogen phosphate, alkaline fertilizer or farmyard manure (such as grass ash) to avoid hydrolysis of zinc sulfate to zinc hydroxide. Crop absorption.
2. When zinc sulfate is applied as foliar fertilizer, the concentration should not be too high to avoid causing zinc poisoning in crops. In order to improve the efficiency of zinc fertilizer, it is best to use fertilizers such as molybdenum fertilizer or urea.
3. Excessive application of zinc fertilizer in crops can cause zinc poisoning in plants, mainly in the root elongation of plants, yellowing of leaves, and brown spots. When the zinc content in plants is more than 400 mg/kg, zinc poisoning may occur. When there is too much zinc, the leaves of the plants are chlorotic and yellow, and the stems, petioles and leaves of the leaves are russet, which interferes with the absorption of iron.
