Foliar fertilization puts "five best"

Optimum Concentration Applying foliar fertilizer to the optimum concentration can achieve twice the result with half the effort. If the concentration is too high, it is prone to fat damage or toxins; if the concentration is too low, the purpose of fertilization is not achieved. The optimum concentration of common fertilizer is 0.5-1% urea, 0.2-1% diammonium phosphate, 0.3-0.5% calcium chloride and 0.05-0.2% zinc sulfate.
The best period The general nutrient 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 is 50-60 kg of fertilizer solution per acre, and the atomization degree of the nebulizer should be increased as much as possible. Spraying the whole plant, the back of the new leaves and leaves should not leak. It is advisable to spray vegetables 2-4 times throughout the growing season.
The best part of the foliar topdressing effect 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 the mobility are not strong are phosphorus. , sulfur, etc., some of the moving elements are iron, copper, manganese, molybdenum and so on. The elemental fertilizer solution that cannot be moved or moved is better sprayed on new leaves.
The best mixed spray Various foliar fertilizers mixed spray, or fertilizer and pesticide mixed spray, can play a multi-effect, but the mixed spray should first clear the nature of the fertilizer and the nature of the pesticide. 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 first formulated into an aqueous solution, and then other fertilizers are directly added to the prepared fertilizer solution according to the amount. The solution is shaken and then sprayed.

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