First, the winter shearing time is generally carried out after the natural defoliation of grapes and before the wounding period of the following spring. Secondly, the appropriate amount of shoots remaining, and the amount of remaining buds have a great influence on the quality of production and plant growth and development. In general, the species with weak growth and strong erectness have 13-15 poles per square meter of surface area, 10-13 of which are middle-aged, and 7-9 of which have strong growth potential. When pruning, pay attention to fineness and stay strong. Third, the length of branches and leaves of the vines According to species characteristics, growth of branches, posture and Fertilizer, water, climate conditions, using long, medium and short shoots mixed pruning method. For example, if the varieties grow vigorously, the branches are thick, the racks are large, and the water and fertilizer conditions are good, 2-3 shoots of short shoots can be used for pruning. In between, the shoots are left with 4-6 shoots. Fourth, update the pruning of two branches is a common method, that is, the same base branches to stay two to the side of the annual branches. The upper branches of the vines are trimmed to produce the vines, and the lower branches are trimmed for the preparation of vines. In the second year of winter pruning, the upper branches are cut off and the lower vines are left in the same way as last year. This can slow down the rise of the result area, so that the plant maintains a strong result and growth state, to ensure stable production and harvest in successive years.
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