What will happen to mung beans after spraying foliar fertilizer on hot days?

The first situation is that after foliar fertilizer is applied, the amount of organic fertilizer and chemical fertilizer is reduced, which affects crop yield. Generally speaking, foliar fertilizer can only play a role on the basis of sufficient nitrogen, phosphorus and potassium, which is a comprehensive effect and can only play the role of "icing on the cake".

In the second case, when spraying fertilizers on crops and vegetables, I like to apply several foliar fertilizers together, thinking that the more fruits, the better. Many farmers think that any fertilizer can be sprayed as foliar fertilizer as long as it is "easy to melt", but it is not. For example, fertilizers with strong volatility, such as ammonia water and ammonium bicarbonate, cannot be used as foliar fertilizers if sprayed at high temperature after spraying, which will cause damage to crops and burn leaves. Moreover, many trace fertilizers cannot be mixed with pesticides, and acidic fertilizers and alkaline fertilizers cannot be mixed and sprayed. Fertilizer-fertilizer and fertilizer-medicine should be mixed and applied in a targeted way, so as to play the role of "one spray with multiple effects", otherwise it will be counterproductive.

The third situation is that the greater the concentration of foliar fertilizer spraying solution, the better, which is incorrect. For example, urea can only be below 1%, potassium dihydrogen phosphate can only be below 1%, and more medium and trace element fertilizers such as calcium chloride, borax, zinc sulfate, ferrous sulfate and copper sulfate can only be below 0.2%. When the concentration is too high, you can't spray fertilizer, but it will dehydrate and wither crop leaves, leading to fertilizer damage, similar to drug damage and poisoning. Generally, spraying fertilizer solution on both sides of leaves begins to drip. Too much fertilizer solution will lead to rising cost and waste of fertilizer.

The fourth situation is that foliar fertilizer spraying can't grasp the key spraying period and can't achieve the predetermined effect. Some farmers think that foliar spraying can be implemented at any time of plant growth and development, which is actually wrong. Foliar spraying is carried out at the turning point of crop growth, and the spraying time is at least 20 days apart. Generally speaking, crops are sprayed 2-3 times a season. Different plants and fertilizers, foliar spraying fertilizer, the appropriate period is also different. Rice, corn, wheat and other cereal crops should be sprayed with fertilizer at booting stage, flowering stage and filling stage. Soybean, peanut, broad bean, kidney bean and other legume crops should be sprayed with fertilizer during flowering and pod setting. Cotton should be sprayed with fertilizer during flowering and boll opening. Molybdenum fertilizer should be sprayed before flowering. Spraying boron fertilizer and zinc fertilizer at the initial flowering stage. As far as the time of spraying fertilizer is concerned, it should be carried out on a windless cloudy day or a sunny morning after the dew on the leaves is dried, avoiding the hot sun and high temperature period, and the spraying effect is better in the morning and evening.