The best period of general vegetable seedling, initial flowering or mid-late and post-experience period is the best period for spraying foliar fertilizer. It is better to spray on a cloudy or sunny day in the morning and evening. It should be avoided when spraying in the hot sun and spraying in time after the rain.
The best dosage is 50-60 kg of fertilizer per acre, and the sprayer's atomization should be increased as much as possible. The entire plant sprays, the new leaves and leaves behind cannot be sprayed. It is advisable that the vegetables are sprayed 2-4 times throughout the growing season.
The effect of top dressing on the best part of the leaf surface is related to the speed of movement of the sprayed elements in the plant. Nitrogen, phosphorus, potassium, and sodium are the most mobile elements, and all the elements that can move but are not strong are phosphorus. , Sulfur, etc. Some of the moving elements are iron, copper, manganese, molybdenum, and others. Fertilizers that do not move or have low mobility are better at spraying on new leaves.
The best mixed spray of mixed spraying of various kinds of foliar fertilizers, or mixed spraying of fertilizers and pesticides, can play a role of a multi-effect spray, but when mixing spray should first understand the nature of fertilizer and pesticide properties. If the nature is opposite, never spray. When preparing the mixed solution, it must be mixed evenly, and it is ready for use. Normally, one kind of fertilizer is first formulated into an aqueous solution, and then the other fertilizer is directly added into the prepared fertilizer solution according to the amount, and the solution is sprayed after shaking.
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