1、 How to prune

1. Pruning length: when pruning, the length to be cut should be judged according to the growth of each branch, the location of flower bud and the rate of fruiting branch. Under the same conditions, the branches with good nutrition should be kept long. If the flower buds of weak branches are well distributed, they should be appropriately shortened. Under normal circumstances, the extended branches should be kept long and the prepared branches should be cut short. In addition, if the area is arid or the fertilizer and water are insufficient, the main reason is to trim the short shoots

2. Pruning position: the tissue of each cut will be loose, and the water is easy to evaporate. Therefore, the cut should be far away from the bud eye, leaving a distance of about 2-4cm to avoid too much water evaporation. In addition, the position of the cut should be on the opposite side of the bud

3. Amount of buds: when pruning, the amount of buds should be controlled, not too dense or too sparse. In general, the amount of buds left is twice as much as that in the spring of the next year. For example, 15-20 buds should be left on the new shoots of the hedgerow frame surface, and 30-40 buds should be left when pruning in winter, so as to ensure the flowering and fruit in the later stage

2、 Winter pruning time

When pruning grapes in winter, we must control the time, not too early or too late, otherwise it will be unfavorable to the growth of next year and affect its nutrient storage. It is best to prune from dormancy to the first 30 days of bleeding, specifically from late October to mid and late November. If it is planted in a greenhouse, it should be carried out before film covering