First, according to different crops, scientific selection and configuration of foliar fertilizer is the key to improving the application effect.
Leaf vegetables. For vegetables based on edible stems and leaves, such as Chinese cabbage, cabbage, spinach, celery, bamboo shoots, leeks and other vegetables, the foliar fertilizer is generally based on urea, ammonium sulfate and other water-soluble available fertilizer, urea concentration of 2%, ammonium sulfate The concentration is 0.3%, spraying 60-80 kilograms per acre, the general growth period is generally 2 to 3 times, it is also suitable to spray 0.3% to 0.5% of rice vinegar solution, 50-60 kilograms per acre is appropriate.
Melon and Solanum vegetables. Eggplant, pepper, tomato, zucchini, cucumber and beans, kidney beans, kidney beans, etc., leaf fertilizer to NPK mixed fertilizer or multiple compound fertilizer, such as 0.3% of potassium dihydrogen phosphate, 1% of urea plus 2% The superphosphate (leaching solution) plus 0.5% potassium sulfate solution and 0.08% rare earth fertilizer solution, leaf treasure, photosynthetic fertilizer, ammonium molybdate and other trace fertilizer. Generally sprayed 2 to 3 times in the whole growth period, spraying 40-50 kilograms per acre, and spraying multi-element fertilizers on fruits and vegetables is more effective. Such as spraying sugar nitrogen solution (0.2% urea plus 0.3% potassium dihydrogen phosphate plus 1% sucrose), not only can increase the yield, but also can significantly increase the plant's resistance to disease, reduce the risk of diseases such as downy mildew vegetables.
Bulbs, root vegetables. Onion, garlic, radish, carrots, potatoes, taro and other vegetables, foliar fertilizers are generally dominated by phosphorus and potassium, such as 0.3% potassium dihydrogen phosphate solution, superphosphate and ash immersed in liquid and so on. Root vegetables can be sprayed with 0.2% borax solution, which can effectively prevent the occurrence of physiological diseases. Spraying 0.1% zinc sulfate plus 0.2% ammonium molybdate solution on potato significantly affected tuber enlargement and quality.
Second, master the best period of spraying foliar fertilizer
Foliar fertilizer should be sprayed according to the cultivation period of the vegetables. Vegetable seedlings, small growth, nutrient consumption, and easy to spray after spraying harm, should not be sprayed; hairy stems and leaves vigorous growth, strong root absorption, and should not use foliar fertilizer; vegetable product organ formation phase Roots decay, absorption capacity weakens, and nutrient consumption is the greatest, so this period is the best period for spraying foliar fertilizer, which can effectively solve the contradiction between plant vegetative growth and reproductive growth.
Ningbo DOKEE Medical Technology Co., Ltd. , https://www.dokeemedical.com