Optimum concentration: The best concentration of foliar fertilizer can achieve a multiplier effect. If the concentration is too high, it will be prone to produce fertilizer or toxins; if the concentration is too low, the purpose of topdressing will not be achieved. The optimum concentration of commonly used fertilizers is urea 0.5%-1%, diammonium phosphate 0.2%-1%, calcium chloride 0.3%-0.5%, and zinc sulfate 0.05%-0.2%.
Optimum period: In order to obtain the best results, the spraying of foliar fertilizer is usually performed at the seedling stage, the initial flowering stage or the critical period of mid- and late-stage fertilization of vegetables. Choose a cloudy or sunny morning and evening spray effect, should avoid the sun burning, the large amount of transpiration of the leaves caused by poisoning, after the rain should be promptly make up spray.
The best dosage: Spray 50-60 kg of fertilizer solution per acre, and the fogging degree of the sprayer should be increased as much as possible. Whole plant spraying, new leaves and foliage behind can not be sprayed. It is advisable that the vegetables are sprayed 2-4 times throughout the growing season.
The best part: The effect of foliar dressing is related to the speed of the spraying of the elements in the plant. The more mobile elements are nitrogen, potassium, sodium, etc. All of the elements that can move but are not strong are phosphorus, Sulfur, etc.; some of the moving elements are iron, copper, manganese, molybdenum, etc. Fertilizers that do not move or have low mobility have a good effect on new leaves.
The best mixed spray: 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 mixed spray should first understand the nature of fertilizers and pesticides. If the nature is opposite, never spray. When preparing the mixed spray solution, it must be mixed evenly, and the existing ones should be prepared. Generally, one kind of fertilizer is first formulated into an aqueous solution, and then the other fertilizers are directly added into the prepared fertilizer solution according to the amount, and the solution is sprayed after shaking.
Economical ENT Scope
Economical ENT Scope,High Quality Economical ENT Scope,Economical ENT Scope Details, CN
Wuxi Biomedical Technology Co.,Ltd , https://www.wxbiomedical.com