First of all, the purpose of pulling apple trees is to artificially shape apple trees, and pulling apple trees is also an effective auxiliary means to prune fruit trees and trees. Generally, it is more appropriate to pull apple trees from September, because in autumn, the branches of apple trees are soft and not easy to break. First of all, pay attention to the small fruit tree seedlings on the branches. In that year, small fruit trees will basically grow 3 ~ 5 branches and main stems. First of all, three branches should be selected from the lower layer, which requires strong branches and moderate angles to form three main branches of the fruit tree. If the first floor has branches, we can support it with diagonal shapes.

Originally, apple trees can pull branches all year round, but in winter, when the trunk is hard, it is easy to break branches, and it will also break the fertilizer and water pipes of branches, which is prone to lobular disease. At the same time, it is easy to freeze in winter, and there is no need to pull branches in winter. In spring, pulling branches and opening corners can only be said to be better than not pulling branches. For straight branches and oblique branches with small angles, if they are not opened, their growth will be stronger, longer, thicker and faster, which will seriously affect the growth of surrounding branches, cause imbalance between tree potential and branch potential, and disrupt the tree shape.

Pruning, as an important measure of tree transformation, helps to promote the formation of young trees, adjust tree vigor and branches, alleviate flower promotion, improve light and improve fruit quality, which is irreplaceable by other methods in fruit tree pruning. It is best to pull the branches of apple trees in July and August. At this time, the tree potential is relatively stable, which is the time for trees to grow quickly. Generally, it is adjusted once in May and June in spring. It can be said that it is more appropriate to divide it twice a year. The main selection time is the most suitable time for trees to grow fast.

Pruning of apple trees should be carried out in the growth period. The best time for pruning of apple trees is: after flowering, the trunk branches and perennial branches with vigorous growth for more than 3 years should be carried out in the middle and late May (that is, the spring shoot flourishing period), and 1-2-year-old trunk branches and fruitless perennial branches should be absorbed by the plant roots in the middle and late August, and some of them can be transported back to the roots through phloem after being transported to the aboveground parts. In this way, mineral nutrients have gone through the process from root to xylem, then to shoot, then to phloem and then to root, which is the cycle of mineral nutrients.