First, leaf vegetables. Such as cabbage, spinach, leek, etc. need more nitrogen, spray fertilizer should be based on urea, ammonium sulfate, spraying concentration of urea should be 1% -2%, ammonium sulfate is 1.5%, spraying 2-4 times a season It is appropriate to spray in the early stage of growth.
Second, fruits and vegetables. Such as pepper, eggplant, tomato, beans and various melons, the need for NPK more balanced, should use NPK mixed solution or compound fertilizer. Spray 1%-2% urea with 0.3%-0.4% potassium dihydrogen phosphate solution or 2% compound fertilizer solution. It is usually sprayed 1-2 times in the early and late stages of growth. Late spraying can prevent premature aging, enhance stamina, and has a good effect of increasing production.
Third, root vegetables. Such as garlic, onions, radishes, potatoes, etc. need more phosphorus and potassium, leaf fertilizer can use 0.3% of potassium dihydrogen phosphate solution, 10% of the ash leaching fluid. Spraying 3-4 times per season is generally effective.
Spraying foliar fertilizer is best when the cloudy afternoon or sunny day is not strong in the afternoon sunshine. According to the growth of vegetables, spraying 30-50 kilograms per acre each time, to limit the wetness of the foliar fertilizer. According to the needs of different vegetables for trace elements, the appropriate amount of micro-applied fertilizer can increase the yield and improve the quality of the effect, labor-saving multi-effect, but avoid acid and alkali neutralization.
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