How to choose vegetable leaf fertilizer According to different crops, scientific selection and configuration of foliar fertilizer is the key to improving the application effect. Leaf vegetables are mainly edible stems and leaves of vegetables, such as Chinese cabbage, cabbage, spinach, celery, bamboo shoots, leeks and other vegetables, foliar fertilizers are generally urea, ammonium sulfate and other water-soluble available fertilizers, urea concentration of 2 %, ammonium sulfate concentration of 0.3%, spray 60-80 kg per acre, the general growth period of general spraying 2 or 3 times is appropriate, can also be sprayed with 0.3% to 0.5% of the rice vinegar solution, spray 50-60 kg per mu should. Melons, solanaceous vegetables, eggplants, peppers, tomatoes, zucchini, cucumbers, beans, cowpeas, 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% of superphosphate (leaching solution) plus 0.5% of potassium sulfate solution and 0.08% of rare earth fertilizer solution, foliar treasure, photosynthetic micro fertilizer, ammonium molybdate and other fertilizers. 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.
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