How to prune chestnut (explain chestnut pruning technology in detail)

Time: It is usually carried out at the end of winter in 65438+February and February of the following year, and can be pruned again in May-July of the following year.

Short cut: cut off the annual part and cut off the branches of 1/3-2/3. Adult trees should control the number of short sections.

Thinning: cutting off annual or perennial branches from the base, mainly cutting off dry and dead branches, excessive branchlets, pests and diseases, etc.

Retraction: For perennial branches that are more than two years old, cutting off the top branches can play a role in rejuvenation.

One. time

Pruning of chestnuts can be carried out in winter, and it can be carried out in late June+next February. The main purpose is to prune the useless parts of the tree so as not to consume more nutrients in the tree, and to enhance its ventilation and light transmittance after pruning. When cutting in winter, cutting should be carried out according to the region to avoid freezing. In addition, it can be pruned again in May-July of the following year, but be careful not to over-prune, so as not to affect the tree potential.

Second, shortcuts.

The shortcut is usually to cut off the annual part. After pruning, it can stimulate the lateral buds to produce strong branches, thus making the crown grow more compact. Short cut can cut off13 branches, which is called light short cut, and heavy short cut is usually 2/3 or more branches. Short cut is suitable for shaping young trees. If it is an adult fruit tree, the number of short cuts should be controlled.

Third, thinning.

Cut off annual or perennial branches directly from the base, which is not only beneficial to the formation of flower buds, but also can enhance ventilation. In addition, dead branches, excessive branches, pests and diseases, etc. It should be trimmed in time. For young trees, don't prune branches too much. For adult trees, thinning is the main pruning method.

Fourth, take it back

For perennial branches that are more than 2 years old, keep the developing branches sprouted by dormant buds on the perennial branches and cut off the top branches. For the weak branch retraction of old trees, it can play a role in renewal and rejuvenation. When the chestnut tree enters the aging stage, the big shoots will appear serious dead shoots, and at this time, it should be retracted to the middle and lower part or the base, which can stimulate the cryptobud to germinate strong buds, make it grow into backbone branches and form COVID-19.