Precautions for fertilization after harvesting

In the middle and late September, the grapes were harvested and matured. After harvesting and before wintering (early November), the nutrients of the tree are transferred from the fruit to the accumulation before harvesting, and the second growth peak appears in the roots. At this time, fertilization is critical, which is the second The high yield and high quality of the grapes played a decisive role.

First, foliar spray fertilizer. In this period, the leaf resistance of the grape leaves is strong, and the concentration of the foliar fertilizer can be appropriately increased, and the foliar spray is applied with 0.5% urea and 0.5% potassium dihydrogen phosphate.

Second, early topdressing. Immediately after picking the fruit, the quick-acting fertilizer should be chased once. For the late-maturing varieties, the fertilizer should be topdressed before harvesting. Each 1/15 hectare (1 mu) should be applied with potassium ternary compound fertilizer or 20 kg of special fertilizer for fruit trees.

Third, apply enough base fertilizer. After harvesting the grapes, the effect of applying the base fertilizer before harvesting is good. When the root system is in the active period, the roots can be restored and the roots can be restored, and it can play a positive role in the nutrient accumulation of the tree. 1/15 hectares of high-quality soil and fertilizer 3,000 kg, pure nitrogen 15 kg, pure phosphorus 15 kg, pure potassium 25 kg, bio-calcium fertilizer 25 kg, zinc sulfate 2 kg, ferrous sulfate 2 kg, borax 0.5 kg, nitrogen removal 60%, potassium 50% remained as top dressing, and the other fertilizers were applied to the fertilization ditch 30 cm deep and 40 cm wide.

Regardless of the application of quick-acting fertilizers or the basic fertilizers for autumn, water should be watered in time to solidify the soil, promote the rapid decomposition of fertilizers, restore the tree potential, and accumulate nutrients, providing a reliable guarantee for the growth, flowering and fruiting of the second year.

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