Foliar fertilization technology has the advantages of faster transformation, higher fertilizer use efficiency, 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, calcium superphosphate, ammonium nitrate light and micro-fertilizer and many other.
Foliar fertilization should pay attention to the following points:
1. It should be done on the basis of applying basic fertilizer and timely fertilizer;
2. To select the appropriate types of foliar fertilizers for the types of vegetables, growth stages, growth potential, fertilization purposes;
3. The concentration of liquid fertilizer should be reasonable;
4. Select evening or cloudy spray;
5. Pay particular attention to the uniform spraying of vigorously growing leaves and leaves. For greenhouses such as cucumbers, eggplants, peppers, celery, leeks, and other vegetables, solid multi-element composite foliar fertilizers can be used that have been supplemented with disease-preventing and curative medicines, which are effective and cost-effective; Greenhouse cucumbers can be sprayed with 0.2% urea plus 0.2% potassium dihydrogen phosphate plus 1% sucrose in the sugar nitrogen solution to not only increase disease resistance, but also reduce the risk of downy mildew; apply micronutrients and light absorption inhibitors, spraying tomatoes, Cucumber, pepper, bean, celery, cabbage, cabbage, lettuce, cauliflower and other effects are very good.
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