Cut short: 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 dead branches, dead branches, excessive branchlets, pests and diseases, etc.
Retraction: For perennial branches over two years old, cutting off the top branches can play a role in rejuvenation.
I. Time
Pruning of chestnuts can be carried out in winter, and it can be carried out in late June 65438+ next February. The main purpose is to prune the useless parts of trees so as not to consume more nutrients in the trees, and to enhance their ventilation and light transmission after pruning. When cutting in winter, it should be carried out according to the region to avoid cold. In addition, it can be pruned again from May to 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 year part. Pruning can stimulate the lateral buds to produce strong branches, thus making the crown grow more compact. Branches with short sections that can cut off13 are called light short sections, and branches with heavy short sections are usually 2/3 or more. Chopping is suitable for shaping young trees. If it is an adult fruit tree, the number of short cuts should be controlled.
Third, thinning.
Cutting annual or perennial branches directly from the base 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 too much, and the pruning of adult trees is mainly thinning.
Fourth, take it back
Retraction is to keep a developing branch germinated by dormant buds on the perennial branches for more than 2 years, and cut off the top branches. For the weak branch retraction of old trees, it can play a role in renewal and rejuvenation. When chestnut trees enter the aging stage, serious dead branches will appear at the top of big branches. At this time, they should be retracted to the middle and lower parts or the base, which can stimulate the hidden buds to sprout strong buds, make them grow into backbone branches and form COVID-19.