After the grapes are harvested and before the winter, the nutrients of the tree are transferred from the harvest to the fruit before harvest, and the second peak of growth occurs in the root. At this time, fertilization is crucial. This is the reason for the high yield and quality of the grapes in the second year. It is decisive.

1 Leaf spray fertilizer: During this period, the resistance of grape leaves is strong, and the concentration of foliar fertilizer can be appropriately increased. Foliar spray is performed with 0.5% urea and 0.5% potassium dihydrogen phosphate.

2 Early application of fertilizer: Immediately after fruit picking, immediately apply one-time quick-acting fertilizer, and apply late-maturing varieties to topdressing before fruit harvesting, applying potassium sulfate ternary compound fertilizer or fruit tree-specific fertilizer 20 kg per mu.

3 Applying basal fertilizer: The effect of applying base fertilizer after harvesting to defoliation is good. When the root system is in an active period to recharge, not only the damaged root can be restored, but also it can play a positive role in the accumulation of nutrients in the tree. Apply 3,000 kg of high-quality mixed fertilizer per acre, 15 kg of pure nitrogen, 15 kg of pure phosphorus, 25 kg of pure potassium, 25 kg of biological calcium fertilizer, 2 kg of zinc sulfate, 2 kg of ferrous sulfate, 0.5 kg of borax, 60% nitrogen removal 50% of potassium is left as topdressing, and the rest of the fertilizer is applied in a fertilization ditch with a depth of 30 cm and a width of 40 cm. Whether it is to apply fast-acting fertilizers or base fertilizers in autumn, it must be watered in time to sink the soil, promote the rapid decomposition of fertilizers, restore tree vigor, and accumulate nutrients to provide adequate nutrition for the growth, flowering, and fruiting of the second year.

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