Foliar Fertilization "Three Mistakes"

Misunderstanding 1: As long as the “opening fertilizer” can be sprayed on the crops and vegetables to spray fertilizer, several kinds of foliar fertilizers are added together, thinking that the more complete the type of the better, no matter what fertilizer, as long as "Chemically open" can be used as foliar spraying, but it is not. Fertilizers with high volatility are not suitable for spraying foliar fertilizers. High temperatures after spraying can cause damage to crops and burn the leaves. Moreover, many micro-fertilizers cannot be mixed with pesticides. Acidic fertilizers and alkaline fertilizers cannot be mixed and sprayed. Targeted mixed-mixing should be used to achieve the effect of “one spray and multiple effects”, otherwise it would be counter-productive. Misunderstanding 2: The higher the spray concentration, the better the better the concentration of the foliar fertilizer solution is. This is incorrect. For example, the concentration of high-nitrogen water-soluble fertilizers should be below 1%, and the concentration of potassium dihydrogen phosphate should only be below 1%. More intermediate and trace element fertilizers such as sugar-alcohol calcium fertilizers, sugar-alcohol-calcium-boron fertilizers, zinc-alkoxides, etc. The concentrations of chelated iron and chelated copper should all be less than 0.2%, and they should be used strictly in accordance with the product specifications. In case of over-concentration, the effect of spraying foliar fertilizer will not be achieved; on the contrary, the leaves of the crop will be dehydrated and withered, resulting in fertilizer damage. Generally sprayed to the front and back of the blade to spread the fertilizer solution began to drip, spraying too much fertilizer solution will also lead to increased costs, fertilizer waste. Misunderstanding 3: Any period can be sprayed on the growth and development of plants at any time, any time can be implemented foliar spray fertilizer, this is wrong, foliar spray fertilizer is not good to control the spraying period, but also reach the desired effect of. Foliar spraying is best carried out during the growth phase of crop growth. Each spraying time is at least 20 days apart. In general, it is sprayed 2-3 times per season. Different crops and different fertiliser foliar spray fertilizers have certain differences in suitable periods. Cereal crops such as corn and wheat should be sprayed during booting, flowering, and grain filling; bean crops such as soybeans, peanuts, broad beans, and kidney beans should be sprayed during flowering and scab; molybdenum should be sprayed before flowering. The boron and zinc fertilizers have the best spraying effect at the initial flowering stage of the plant. Foliar spray time should be cloudy or sunny in the morning with no wind, dry leaves after the dew, to avoid the high temperature during the hot days, early and late spray best.

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