An aqueous solution of the nutrients needed by the plants is sprayed on the leaves so that the plants directly absorb effective nutrients through the leaves. This technique is called vegetable leaf surface fertilization. This technology has the advantages of faster transformation, higher fertilizer utilization, and better root absorption of nutrients than soil fertilization. Foliar fertilizer can be roughly divided into a large number of element fertilizers, micro-fertilizers, organic fertilizers, microbial fertilizers, or photosynthesis promoters or pesticides such as foliar fertilizers. Commonly used in production are urea, potassium sulfate, superphosphate, ammonium nitrate light and micro-fertilizer ... ... and so on. Application of leaves should pay attention to the following points: 1, to apply base fertilizer and timely fertilizer on the basis of On the; 2, for the types of vegetables, growth stages, growth, fertilization purposes, use the appropriate type of foliar fertilizer; 3, the concentration of liquid fertilizer should be reasonable; 4, select the evening or cloudy spray; 5, in particular, pay attention to uniform Spray the opposite side of vigorously growing leaves and leaves. For greenhouses such as cucumbers, eggplants, peppers, celery, leeks, and other vegetables, the solid multi-element compound foliar fertilizer “Gao Le†sprayed with the disease-preventing and curative medicines and the low-cost Wumei increase production effect can be used; During the fruiting stage of the greenhouse cucumber, 0.2% urea plus 0.2% potassium dihydrogen phosphate plus 1% sucrose in the sugar nitrogen solution not only increased disease resistance, but also reduced the risk of downy mildew; application of light and micro-fertilizer and light absorption inhibition Agents, spraying tomatoes, cucumbers, peppers, cloud beans, celery, cabbage, cabbage, lettuce, cauliflower and other effects are very good. China Agricultural Network Editor
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