Vegetables supplement zinc fertilizer three
Zinc is one of the trace elements necessary for the growth and development of vegetables, and the application of zinc fertilizer in many vegetables has a significant yield increase effect. For example, tomato, Chinese cabbage, eggplant and legume vegetables are all zinc-like vegetables. The application of zinc fertilizer can improve both yield and quality.
Especially where there are many alkaline soils, the pH value of this type of soil is relatively high, which relatively reduces the effectiveness of zinc and requires zinc supplementation.
Of course, although vegetable production requires zinc supplementation, it does not mean that the more zinc fertilizer is used, the better. Vegetable farmers must remember the "three don'ts" when supplementing vegetables with zinc fertilizer.
Do not overdose. The reason why zinc fertilizer is micro-fertilizer is that the crop needs less of it, and excessive application will cause toxic effects on the crop (some vegetable farmers apply 3 kg of zinc sulfate during the bottom fertilizer, and the leaf surface is frequently supplemented with zinc fertilizer. Zinc sulfate reached 250 grams). It leads to stagnation of crop growth and small and thin leaves, affecting normal photosynthesis.
Do not apply continuously in the base fertilizer. Zinc fertilizer is generally effective as a base fertilizer for a long period of time. It can be applied once and lasts for 1-2 years. In addition to severe zinc-deficient soils, it is recommended that zinc fertilizer be applied once a year. However, in actual production, vegetable farmers will apply zinc fertilizer at the bottom of each stubble vegetable planting, resulting in the application of zinc fertilizer twice in a year, which makes the residual zinc fertilizer in the soil too large, and inhibits the absorption of other elements by the soil.
Do not mix with alkaline fertilizers and alkaline pesticides. Zinc mixed with alkaline fertilizers will react to reduce fertilizer efficiency. Similarly, when zinc is mixed with alkaline pesticides, the effectiveness of zinc and pesticide efficacy are also reduced. Moreover, if zinc fertilizer is mixed with phosphate fertilizer, it will easily form zinc phosphate precipitation, which not only reduces the effectiveness of zinc, but also reduces the fertilizer effect of phosphorus, so they should not be used at the same time.
When zinc fertilizer is used as a base fertilizer, whether it is a large stubble vegetable or a multi-stubble cultivation, it can be applied once at the end of the year. According to different levels of zinc deficiency in the soil, 0.5 to 2 kg of zinc sulfate is applied per mu when used as a base fertilizer. For top dressing, use 0.75 to 1 kg of zinc sulfate per mu mixed with appropriate amount of fine soil; for foliar spray, use 90 to 180 grams of zinc sulfate per mu for 60 kg of water on sunny days. When used, it is best to use it alone, so as not to react with other chemical fertilizers and affect the absorption of zinc by crops.
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