How to trim chestnut aging tree?

After entering the ageing period, severe shoots occur on large branches and the old canopy should be retracted in a timely manner. The specific approach is: cut off from the middle of the big branch or the base, and promote the regeneration of large regenerating branches to re-form the canopy. In order to avoid over-injury of the tree once it is updated, it can be renewed and gradually rejuvenated according to the age of the big branch. When renewal, cutting or slicing can not be close to the new branch, otherwise the renewed branch will be weakened due to large wounds, especially the old and weak chestnuts have weak wound healing ability, the xylem is easy to dry and rot, and a short pile of 4 to 5 cm in length is required. In order to avoid causing new branches of weakness and death.

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