Year-round fertilizer management of grapes

1. The germination fertilizer is applied before the budding of the grape, mainly with nitrogen fertilizer. The purpose is to promote the neat germination, the leaves are thick, and the inflorescence is robust. If the tree vigor is too prosperous and the spring is not very dry, you can save it, so as not to cause new shooters.

2. Expanding fertilizer is applied when the mung bean of the grape fruit is large and the peas are large, mainly nitrogen, and both phosphorus and potash fertilizers are applied. Fertilizer varieties can be selected as high-nitrogen compound fertilizer or ordinary three-element fertilizer as appropriate, adding urea and other nitrogen fertilizers. This time, the amount of fertilizer should be large, which can account for about 50% of the annual chemical fertilizer application amount.

3. Pre-ripening anaerobic fertilizer applies potassium sulfate once every 20-30 days before maturation and grape berry begins to soft but has not been painted, and can also directly apply high-potassium three-element fertilizer, such as nitrogen, phosphorus and potassium contents are respectively 10%, 8%, 27% of Spokane. When there is a shortage of anaerobic ripening fertilizer, it is easy to cause fruit transformation disease (commonly known as jug disease), poor resistance, poor coloration, and reduced sugar content.

4, "Monthly child" fertilizer in the grape harvest after the tightly applied, the main role is to restore tree vigor, promote flower bud differentiation, lay the foundation for the next year's high yield. The monthly fertilizer is generally applied at a rate of 15 kg of urea per 667 m2 (1 mu).

5. The traditional method of overwintering fertilizer is applied during the dormancy period of grapes. In recent years, it is advocated to be applied in August-September. It is considered that this is the second peak period of grape root growth, which can promote a large number of fibrous roots in the grapes and strengthen the trees. The trend is more conducive to wintering. The fertilizer is mainly farmyard manure, and it is necessary to apply calcium fertilizer and a small amount of three-element fertilizer.

The amount of fertilizer and the amount of fertilizer applied each year can be determined according to soil conditions, tree age, yield and fertilizer quality. After each fertilization, the water should be poured once, but after the big fertilizer is applied, two waters should be poured (interval between 5 and 7 days). In addition, before winter, the grapes should be poured once per year. After the soil is loose, it is cultivated once and it is extremely beneficial to antifreeze.

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