Grape pruning can provide a better development direction for plants, which is an important content of grape management and a quite technical work. Below we introduce the main skills and technical points of keeping branches when pruning grapes for your reference.

First, the length of the main vine should be cut off. In the process of shaping young trees, the main vines should occupy the frame surface as soon as possible, and the relative balance between the ground and the underground should also be considered.

Therefore, in the first year of winter pruning, the length of the main vine should be based on the maturity, and then the height of the third lead wire should be limited in hedge cultivation, and the main vine can be cut 2-2.5 meters in greenhouse cultivation.

If the plant is weak and the diameter of the main vine is below 0.5 cm, 2-4 buds should be left for stubble. In the next few years, in principle, it should be cut longer than the previous year, until the frame surface is covered.

Second, the pruning length of grape bearing mother branches is usually divided according to the number of buds left, which is generally divided into five types: extremely short branch pruning, short branch pruning, middle branch pruning, long branch pruning and extremely long branch pruning.

Prune the extremely short branches of 1 bud, the short branches of 2-3 buds, the middle branches of 4-6 buds, the long branches of 7-1bud, and the extremely long branches above 12 buds.

Results Pruning and cutting length of mother branch is actually a very complicated problem, which is related to grape variety characteristics, pruning methods, site conditions, branch growth potential and other factors. Specifically:

(1) Variety characteristics. Varieties with strong growth potential are suitable for pruning medium and long branches; Varieties with moderate growth should be pruned in middle branches or short branches; Weak varieties are suitable for pruning short branches or extremely short branches.

(2) Pruning form. The fan-shaped pruning of hedge frame should be combined with long, medium and short tips; The hedge frame should be trimmed horizontally to form a long front tip and a short back tip. Trunk pruning of scaffolding should be done with short tips or extremely short tips.

(3) Site conditions. In orchards with good site conditions and long growth period, the mother branches should be kept for a long time to avoid unnecessary growth; On the contrary, the mother branches should be kept short to ensure the healthy growth of new branches.

(4) the growth of branches. Thick branches can be kept for a long time according to the size of the space; On the contrary, fine mother branches can be pruned with short branches to concentrate nutrition and restore growth potential.

Third, the cultivation and renewal of grape bearing branches 1, the cultivation and colonization of young fruit branches in the first year, the main vine cultivation is the main one. In areas with long growth period, auxiliary branches can be used to speed up the setting and cultivate auxiliary branches to bear mother branches.

When cutting in the winter of the following year, choose the mother branches to stay on the main vine with a spacing of about 20 cm, and the redundant and over-dense mother branches can be thinned out.

In the winter of the third year, the annual branch from the original mother branch becomes the mother branch of the next year, and the original mother branch and its branches become branch groups.

2. Cultivation and regeneration of branches in full fruit stage At this stage, the number of branches per meter on the main vine should be gradually reduced to about 3, and branches that are out of place, weak in growth and too dense should be thinned.

The remaining branches generally keep two bearing mother branches, and the mother branches are pruned by single branch regeneration or double branch regeneration every winter to keep the healthy growth of bearing mother branches. With the increase of tree age, the number of branches in the branch group increases, so it is necessary to update the branch group in time. The method is:

Gradually shrink the branches, cut off the upper buds, leave more buds, stimulate the germination of latent buds on the main vine or at the base of the branches, cultivate new branches, systematically remove the peripheral old branches, and make all branches renew and rejuvenate year by year.