The latest winter cutting methods and matters needing attention for grapes

The main purpose of grape winter pruning is to maintain tree shape, regulate tree growth and fruit, improve plant ventilation and permeability, adjust the location of fruiting sows, and renew rejuvenated female branches. So when do you cut the grapes in winter? How to do it in winter? Let's take a look.

1. Winter cutting time

Grape winter pruning needs to cut off 1/3 to two-thirds of the vines, so winter pruning should take into account the nutrient loss of the pruned vines. Early or too late pruning will lose the stored nutrients of grapes, which is not conducive to sprouting, flower bud differentiation and new shoot growth in the coming year. The best pruning time is one month before the tree fully enters the dormant period to the bleeding period, while the greenhouse cultivation should end the winter pruning before plastic film mulching. The southern region is relatively warm and should be carried out from late December to January, while the temperature in the north is relatively low, and the best pruning time should be from late October to mid-late November.

2. Winter shearing method

According to the plant yield and the growth potential of branches and vines, winter pruning should decide to retain fruiting branches and control the fruiting branches per square meter; pruning should be carried out in the order from stem to vine, from main to side, after fruiting branches, thinning, retraction, and truncation. For pruning, one-year-old branches with sturdy growth should be selected as fruiting mother branches, with a diameter of more than 0.8 cm. For the retraction of perennial branches, the weak branches should be retracted according to the weak branches and the strong branches should be left under the shearing mouth, while the strong branches should remain mediocre branches under the shearing mouth. Sparse pruning should be cut thoroughly from the base, and attention should be paid not to too many wounds when pruning, so as not to affect the growth and development of fertile branches.

III. Points for attention in pruning

First of all, it is necessary to identify the mother branch, only the high-quality fruiting mother branch can have high germination rate, strong branching ability and good flower bud differentiation in the second year, which will lay a solid foundation for high yield and high quality in the coming year, so the mother branch should choose the one with dark color, workmanship and fully mature branches, and the basal stem node is more than 0.8-1.2 cm thick. In pruning, the pruning length should be determined by the growth potential, the percentage of fruiting branches and the location of flower buds. The trimming mouth should be 2-4 cm away from the bud eye, which can prevent water evaporation from the bud eye and cause dry branches, and the cut mouth should also try to choose the opposite side of the bud.

The above is the introduction of grape winter cutting methods and matters needing attention. I hope I can help you. If you want to know more about it, please follow us.