One is clever foliar fertilizer. The grape is sprayed with foliar fertilizer and sprayed on the back of the leaves, and shoots and young fruit can also be sprayed properly. It can be sprayed during all growth periods after summer. In order to improve ergonomics, it is possible to use a mixture of drugs and fertilizers. In addition to calcium superphosphate, common nutrient elements can be sprayed with melon and fruit. It is best to spray in the windless and rainless evening, also in the morning. From 8:00 to 10:00. It is usually sprayed at intervals of 10 days to 15 days, continuing 2 to 4 times.
The second is to re-build strong fruit fertilizer. 10 days after flowering, or when the fruit has mung bean size, apply fertilization. Apply 500 grams of compound fertilizer to each ditch. Apply water immediately after application. The fruit is then sprayed on the leaves. This is a key fertilizer that promotes the growth of young fruit and shoot growth. It must be sprayed on time, which can effectively increase the fruit's vitality and increase production.
Third, after harvesting grapes, nitrogen fertilizer should be applied in a timely manner to strengthen the function of the leaves, extend the life span of the leaves, increase the nutrient storage of the tree body, and there are two methods of post-harvest nitrogen supplementation, spraying and root application. If the two are combined, the effect is more effective. good. Spray 0.4% urea solution, apply 4 kg of urea per mu.
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