The best period: the general vegetable seedling period, the initial flowering period or the middle and late stages of fertilizer demand is the best period for spraying foliar fertilizer. Choose the morning of the cloudy or sunny day and the evening spray, the effect is better, should avoid spraying in the hot sun, and should be sprayed in time after the rain.
The optimum dosage: spray 50 to 60 kilograms of fertilizer solution per acre. The application should increase the atomization degree of the sprayer as much as possible. The whole plant should be sprayed, and the back of the new leaves and leaves should not leak. It is advisable to spray vegetables 2 to 4 times throughout the growing season.
The best part: the effect of foliar topdressing is related to the speed at which the spraying elements move in the plant. The more mobile elements are nitrogen, phosphorus, potassium, sodium, etc. All the elements that can move but are not mobile are Phosphorus, sulfur, etc., some of the moving elements are iron, copper, manganese, molybdenum and the like. The elemental fertilizer solution that cannot be moved or moved is better sprayed on new leaves.
The best mixed spray: mixed spraying of various foliar fertilizers, or mixed spraying of fertilizers and pesticides, can play a multi-effect, but the characteristics of the fertilizer and the nature of the pesticide should be clarified first. If the nature is reversed, never spray it. When preparing the mixed solution, it must be stirred evenly. Now it is used now. Generally, a fertilizer is formulated into an aqueous solution, and other fertilizers are directly added to the prepared fertilizer solution according to the dosage. The solution is shaken and then sprayed.
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