1. Hedge cultivation and pruning technology: Grape trees are cultivated using hedges, with a height of about 150 centimeters. The planting method is high in the north and low in the south. Regular fan-shaped pruning should be adopted. Generally, 2 to 4 main vines are left on each grapevine, and 2 to 3 fruiting mother branches are left on each main vine. The fruiting mother branches should be pruned according to the mid-to-long shoots, and the preparation branches should be shortened except for the two buds. .
2. Small trellis cultivation and pruning technology: When cultivating vines on a small trellis, the trellis surface should be extended in the middle direction from south to north or in other directions to ensure that the distance between the trellis surface and the greenhouse film is maintained. The distance should be greater than 50 cm, and the dragon-shaped pruning technique can be used. Each grapevine retains 2 to 3 main vines. The distance between the main vines is about 40 centimeters. On each main vine, a fruiting mother branch is retained every 30 centimeters. Approximately 12 main vines can be retained in one square meter. Only one fruiting mother branch is enough, and the excess is cut off.
3. Pruning techniques during the growing season of grape vines: In the greenhouse cultivation of grape vines, there are phenomena such as leggy new shoots and insufficient neat growth. Pruning can be carried out during the growing season of grape vines. You need to pay attention when pruning. To retain the density of branches, greenhouse cultivation and pruning will retain about 25% less total branches than open-air cultivation. It is also necessary to twist the long branches to control their growth and promote balance with new shoots.
When setting the shoots, it is necessary to retain more strong and fruiting new shoots. You can reserve some preliminary branches appropriately. The density of the new shoots should be kept at about 13 per square meter, and the new shoots should be well guided. For new shoots that do not retain secondary fruiting, about 6 leaves should be retained on the ear for topping, and the top two leaves of the secondary shoot should be retained. Multiple topping should be used to control the length, and other excess branches do not need to be retained.