Fruits and vegetables such as pepper, eggplant, tomato, beans and various melons have a relatively balanced need for NPK, and should be mixed with NPK or compound fertilizer. Spray 1% to 2% urea with 0.3% to 0.4% potassium dihydrogen phosphate mixed solution or 2% compound fertilizer solution. It is usually sprayed 1 or 2 times in the early and late stages of growth. Spraying in the later stage can prevent premature aging, enhance stamina, and have a good yield increase effect.
Root vegetables such as garlic, onions, radishes, potatoes, etc. require more phosphorus and potassium, and foliar fertilizers can use 0.3% potassium dihydrogen phosphate solution and 10% grass ash leaching solution. Generally, it is sprayed 3 to 4 times per season, and the effect is good.
Spraying foliar fertilizers is best when the afternoon sun is not too strong on cloudy or sunny days. According to the growth of vegetables, 30-50 kg of spray liquid per acre is used to limit the foliar fertilizer. According to the demand for trace elements in different vegetables, the appropriate amount of micro-fertilizer can be applied to increase the yield and improve the quality, saving labor and efficiency, but avoiding acid-base neutralization.
Author: Jiang Hongtao
Source: Agricultural Science and Technology News
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