When is the best fertilization time for grapes?

1. The base fertilizer for grapes is usually applied after the grapes are harvested in autumn, at which time it is beneficial to the recovery of tree potential. Because grape plants grow and bear fruit in spring and summer, trees consume a lot of nutrients and need to be supplemented urgently.

2. The high temperature in autumn is beneficial to the decomposition of organic fertilizer, and the leaves still have strong photosynthetic capacity. After applying base fertilizer, the leaves of grapes continue to produce a lot of nutrients, which will promote the full maturity of new shoots and flower bud differentiation, and store them in roots and stems, laying a good material foundation for the overwintering and growth of grapes in the coming year.

3. Fertilize grapes with base fertilizer in early autumn, and the cut roots will heal quickly and grow new roots soon. In spring, the ground temperature is low, rising slowly, the root system is not easy to heal after being cut off, and the fertilizer decomposition is also slow, which can not meet the needs of the vigorous growth of grapes in spring.

Extended data:

Top dressing time of grape:

The time and dosage of topdressing can be determined according to soil, grape growth period and yield.

1, the first topdressing is beneficial to the growth of grape shoots and the continuous differentiation of flower buds after grape germination. Nitrogen fertilizer is the main fertilizer, and urea, human excrement and urine and other quick-acting fertilizers can be applied to the roots.

2. The second topdressing should be sprayed before the flowering of grapes, mainly boron fertilizer, and phosphorus, potassium, magnesium and manganese can also be added at the same time to promote pollination and fertilization of grapes and improve fruit setting rate.

2. The third topdressing is mainly nitrogen fertilizer, with phosphate fertilizer, human excrement and urine, diammonium phosphate, etc. In the expansion period of young grapes.

4. The fourth topdressing starts from the ripening period of grape berries. At this time, the fruit began to change color, the acidity decreased and the sugar increased. Topdressing should be mainly phosphorus and potassium fertilizer, with a small amount of nitrogen fertilizer.

Spraying potassium dihydrogen phosphate or plant ash extract on the leaves of grapes, and topdressing human excrement and urine, cake fertilizer, kang soil and plant ash on the roots are all beneficial to increase the sugar content of fruits, improve the quality of fruits and promote the maturity of branches.

References:

Grape fertilization management technology-time and method of grape fertilization-grape planting-agricultural encyclopedia