Different tree ages have different methods. The key of young trees is to determine the trunk, leaving three trunks at 1 m to form a circular crown.

Adult tree pruning has three purposes:

1, adjust the size of one year, and sparse some fruit branches in the new year to ensure that the fruit is nutritious.

2. Keep the tree round and remove the vertical branches.

3, the crown density is appropriate, and the ventilation and light transmission are strong.

Twice pruning time

If apple trees are pruned in winter, their leaves will basically fall off.

1, young tree pruning

(1) Young trees should be pruned according to the principle of "giving priority to lightness, paying equal attention to shaping and results, and promoting early yield increase".

(2) The key point of pruning 2-4-year-old young trees is to clean up a layer of tightly squeezed branches and straighten the tree.

(3) The key point of pruning 5-8-year-old young trees is to clean up the dense branches between layers and improve the lighting conditions of the trees.

2. Pruning of adult trees

The goal of pruning adult trees is to "add luster, lift branches, stabilize high quality and increase yield"

3. For pests and diseases that overwinter in trees, all branches of pests and diseases should be cut off, burned or buried deeply in combination with winter scissors.

4. A large number of overwintering germs and pests often lurk in the gaps between the thick old bark and trunk of fruit trees. Scraping the old bark has a good control effect on many diseases and insect pests.

Third, pruning knowledge.

1, when the tree grows too vigorously, the pruning should be mainly "slow", increase the branch angle of the main branch, remove the upper branch group on the back, and take measures such as ring cutting to control the transport of nutrients and promote flowering;

2. When the tree grows too weak, it can be pruned on the basis of fertilizer and water management to stimulate vigorous growth.

3. When one branch of the fruit tree is big and the other branch is small, and the crown grows, firstly, the branches are thinned at the lower part of the branches, and secondly, the angles of the branches are increased to raise the angles of the branches; Third, large branches leave more fruits, while small branches leave less fruits; Fourth, apply less fertilizer in the direction of big branches and more fertilizer in the direction of small branches.

4. Young trees and first fruits should be used as much as possible to increase the amount of branches; When the fruit is in full bloom, if there is no space, thin a branch and put it in to improve the ventilation and light transmission conditions of the tree.

5. The cross branches in the tree body contract one branch and extend one branch; When crossing between rows, both rows should be retracted to improve ventilation and light transmission.