Prevent excessive application. When the concentration of zinc is appropriate, it can promote the growth of crops. The effect of too low is not obvious. If it is too high, it will have a toxic effect on crops or affect the health of humans and animals. When zinc is used as the base fertilizer, generally 1-2 kg of zinc sulphate per acre is applied. When used as top dressing, 0.75-1 kg per acre is applied to the fine soil. For spraying outside the root, 90-180 g of water is used per mus. Kilograms are sprayed on sunny days. Spraying corn should be in the seedling stage, rice in the tillering to the flowering stage, wheat in the jointing stage, celery and spinach in the seedling stage. Alkaline soil can be appropriately increased in amount.
Prevent application with phosphate fertilizer at the same time. Due to the mixed application of zinc and phosphate fertilizer, it is easy to form a zinc phosphate precipitate, which not only reduces the effectiveness of zinc, but also reduces the effectiveness of phosphate fertilizer. However, after a few days interval, according to the soil conditions, the application of phosphorus and zinc fertilizer is increased, and the yield increase is obvious. . Prevent mixing with alkaline fertilizers and alkaline pesticides. Zinc is mixed with alkaline fertilizers such as lime, ash, and ammonia to form acidic ions, which react with alkaline ions to reduce fertilizer efficiency. Similarly, zinc fertilizer is mixed with alkaline pesticides such as Bordeaux mixture, stone sulphur mixture and rosin mixture, and the effectiveness of zinc and pesticides decreases.
Prevent application with phosphate fertilizer at the same time. Due to the mixed application of zinc and phosphate fertilizer, it is easy to form a zinc phosphate precipitate, which not only reduces the effectiveness of zinc, but also reduces the effectiveness of phosphate fertilizer. However, after a few days interval, according to the soil conditions, the application of phosphorus and zinc fertilizer is increased, and the yield increase is obvious. . Prevent mixing with alkaline fertilizers and alkaline pesticides. Zinc is mixed with alkaline fertilizers such as lime, ash, and ammonia to form acidic ions, which react with alkaline ions to reduce fertilizer efficiency. Similarly, zinc fertilizer is mixed with alkaline pesticides such as Bordeaux mixture, stone sulphur mixture and rosin mixture, and the effectiveness of zinc and pesticides decreases.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Cnc Lathe Parts,Cnc Parts,Precision Cnc Lathe
Machining Parts,Plastic Injection Mould Co., Ltd. , http://www.chmachiningparts.com