Zinc is one of the trace elements necessary for the growth and development of vegetables, and many vegetables have obvious effect of increasing zinc production. Applying zinc fertilizer can increase yield and improve quality. Reasonable use of zinc fertilizer can play a supporting role in the prevention and treatment of viral diseases, so the use of zinc fertilizer can not be ignored.
Although vegetable production requires zinc supplementation, it does not mean that the amount of zinc fertilizer should be used as much as possible. There are three misunderstandings for vegetable growers to supplement zinc fertilizer:
Misunderstanding 1, excessive application. The reason why zinc fertilizer is micro-fertilizer is that the crop needs less of it, and the application amount is too toxic to the crops (some vegetable farmers use 3 kg of zinc sulfate in the base fertilizer, and the latter is also frequently replenished with zinc fertilizer. Zinc sulfate reaches 250 grams). Causes stagnation of crops, small and thin leaves, and affects normal photosynthesis.
Misunderstanding II, continuous application in the base fertilizer. The zinc fertilizer as base fertilizer is generally valid for a long period of time. It can be applied once and last for 1 to 2 years. In addition to severe zinc-deficient soil, zinc fertilizer is recommended to be applied once a year. However, in practical production, vegetable farmers apply zinc fertilizer at the end of every vegetable planting, resulting in zinc fertilizer applied twice a year, which leads to excess zinc in the soil and inhibits the absorption of other elements in the soil.
Misunderstanding three, mixed with alkaline fertilizers and alkaline pesticides. When zinc is mixed with alkaline fertilizers, it will react and reduce the fertilizer effect. Similarly, the combination of zinc and alkaline pesticides reduces the effectiveness of zinc and the efficacy of pesticides. Moreover, if zinc fertilizers are mixed with phosphate fertilizers, it is easy to form zinc phosphate precipitation, which not only reduces the effectiveness of zinc, but also reduces the fertilizer efficiency of phosphorus, so they should not be used at the same time.
Therefore, when zinc fertilizer is used as a base fertilizer, no matter whether it is a year or a year, it can be cultivated one year later. According to the degree of zinc deficiency in the soil, 0.5 to 2 kg of zinc sulfate per mu is used as base fertilizer. When topdressing with 0.75 ~ 1 kg of zinc sulfate per acre mixed with appropriate amount of fine soil applicator; foliar spray, then use 90 to 180 grams of zinc sulfate per acre of 60 kg of water in sunny days. When used, it is best to use it alone to avoid reaction with other chemical fertilizers and affect the absorption of zinc by the crop.
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