What is the function of pulling branches of apple trees

The planting area of apple trees in China is very large, when planting apples, we need to do a good job of pulling branches. Reasonable branch pulling is very beneficial to the tree potential, flowering and lighting conditions of apple trees, so we must pay more attention to it. So what is the specific function of Apple pulling branches? When should it be carried out? Today, the editor will give you a brief introduction. Let's take a look at it.

First, pull time

Generally speaking, except for winter, the other three seasons of apple trees can be carried out. However, it is best to be able to do it from August to September, and branches within two years should be pulled when the branches are semi-lignified, that is, in early autumn. Because at this time the apple branches are very soft and malleable. It can be easily fixed after pulling branches, and new branches will not come out on the back. It can also improve the accumulation of nutrients and promote the formation of flower buds, thus increasing the proportion of medium and short branches. In addition, there is also a better time to pull branches after fruit trees sprout at the end of spring, but each period has its advantages and disadvantages, so we should pay more attention to it.

Second, branch pulling effect

1. Enlarge the crown

Under the conditions of natural growth, the expansion angle of the branches of apple trees is generally not very large. Therefore, it is difficult to open the canopy of apple trees, the inner chamber space is not very large, and the number of fruiting branches is not large, thus affecting the yield of a single plant. If the branch is pulled reasonably, it can not only effectively expand the crown area, but also increase the space inside the crown. Increase the fruiting branches of the inner chamber, so as to ensure that the apple tree can bear fruit both inside and outside the crown, form a three-dimensional fruiting model, and improve apple yield.

2. Improve permeability

As I just said, the angle of branches that apples naturally grow is relatively small. Therefore, the permeability in the apple tree is also relatively poor, and the important role of pulling branches can expand the angle of the branches. Generally, it can be guaranteed to reach about 90 degrees. After proper branch pulling, the number of upright branches in the tree can be significantly reduced, so as to achieve the purpose of hierarchical distribution of branches. And it will not affect the ventilation and ventilation in the tree, improve the permeability, but also increase the photosynthetic area of the fruit tree, so as to enhance the photosynthetic efficiency and fruit quality of the crown chamber.

3. Promoting short-term and profitable flowers

After pulling the branch to expand the angle of the branch, it will reduce the growth ability of the top of the fruit tree. Slow down the upward transport speed of nutrition and water in fruit trees, and promote the bud germination of branches, so as to increase the number of medium and short branches in fruit trees. The increase of short branches can improve the photosynthesis of fruit trees and increase the accumulation of photosynthetic matter in fruit trees. And the branches are generally suitable for flat and oblique state, so the downward transport speed of photosynthesis products will also slow down. The improvement of self-retained nutrition of branches is very beneficial to flower bud differentiation.

The above is a brief introduction to the function of pulling branches of apple trees. That's all for today's introduction. This article is for reference only. I hope it can be helpful to everyone.