4- 15 branches rotate at the base, resulting in the phenomenon of pinching the neck of the tree, which leads to the thinning of the center of the tree and affects the growth potential of the tree.

Solution: Sparse the L lower branches in the verticillate branches, shrink the L branches again, and then flatten the remaining 2-3 branches.

ニ, this fixing level is too high.

The height of the apple tree is above l2O cm, the lower part of the trunk is exposed, the growth of the tree is weak, and it forms late, which is not conducive to early high yield.

Solution: Carve buds on the proper parts of the trunk, or perform abdominal grafting on the proper parts.

Third, the rating is too low.

The height of the fixed trunk of apple tree is less than 60 cm, and there are many big branches in the lower part of the trunk, but the new shoots in the lower part grow very long, the central trunk of the tree is not obvious, and the fruit quality of the branches near the ground is poor, which affects the formation of the crown.

Solution: cut the upper branches of the tree short to increase the number of branches.

Girdling the lower branches and thinning them year by year after fruiting to enhance the growth potential of the upper parts of fruit trees.

Fourth, the pruning is too heavy.

Because the tree is messy, most useless branches are removed after plastic pruning, which leads to excessive pruning, scarred main branches on the trunk, weak body length and weak growth of main branches, which affects the growth potential of the tree.

Solution: For the useless big branches on the trunk, the-part can be properly thinned, then the-part can be reduced, and the-part can be pressed down by three saws.

For the branches on the back of the main branch, there is no room for thinning, and there is room for re-trimming.

Five, spindle-shaped tree body, too many branches.

In production, some fruit growers flatten spindle-shaped trees in addition to thinning branches, so that some branches are completely flattened, which leads to excessive growth of back branches and slow elongation of flattened branches, thus affecting the expansion of crown. This method is incorrect.

The correct method is: the length of the lower elongated branch of the tree is more than 100cm, and the length of the upper elongated branch is 5O-6O cm, and the branches of each part are pulled to reach the length of the pulled branch.

If the branch length is not reached, it can be cut short when the bud is full, or it can continue to extend freely.

Sixth, pay attention to winter scissors and despise summer scissors.

There are many pruning branches in winter, and the pruning amount is large. After entering the growing season, there are many buds near pruning, and the back branches are flourishing, and the branches can't keep up, which will lead to a vicious circle of pruning and cavity cleaning in winter, cavity filling in summer and cavity cleaning in winter, which not only wastes a lot of nutrition of the tree, but also delays the fruits and affects the economic benefits.

The correct way is: when cutting Wang Shu in winter, thinning should be moderate.

The missing branches germinated before they germinated.

Erase useless buds in the middle and late April.

In late May, the leafy auxiliary branches were girdled.

From July to August, soften the branches and adjust the angle.

In autumn, the small-angle backbone branches are angled at the base, and the over-dense upright branches, long branches and competitive branches are thinned out.