A method of tending to promote the recovery of natural secondary forests in western Sichuan alpines by using preserved trees

Abstract

The invention discloses a tending method for promoting western sichuan subalpine natural secondary forest to restore by utilizing reserved trees. The method comprises the following steps: S1, selecting abies faxoniana, dragon spruce, hemlock, red birch and white birch as target tree species which need restoring in the secondary forest; S2, selecting the reserved trees; when the target tree species are the abies faxoniana, the dragon spruce or the hemlock, controlling the diameters at breast heights of the reserved trees to be more than or equal to 25cm; when the target tree species are the red birch or the white birch, controlling the diameters at breast heights of the residual trees to be more than or equal to 35cm; S3, dividing the restoration stage of the natural secondary forest according to the importance value of dominant tree species of community, wherein the restoration stage of the natural secondary forest is divided into a bushwood stage, a birch broad-leaved forest stage and a mixed broadleaf-conifer forest stage; S4, tending at the bushwood stage, tending at the birch broad-leaved forest stage and tending at the mixed broadleaf-conifer forest stage. In the restoration process of the western sichuan subalpine natural secondary forest, the reserved trees are fully utilized to tend and manage the secondary forest, so that the adverse effects of felling to the service function of a forest ecosystem can be slowed down, update is promoted, and the time for enabling the secondary forest to be restored into a forest after felling is shortened.

Description

technical field

[0001] The invention relates to a tending method for restoring secondary forests, in particular to a tending method for promoting the restoration of natural secondary forests in western Sichuan alpines by using preserved trees. Background technique

[0002] Retained trees refer to the trees that remain after the forest ecosystem is disturbed by intensity. Retained trees have a variety of ecological effects on the maintenance and restoration of the structure and function of the degraded forest ecosystem: mainly including the biological factors in the natural secondary forest after the intensity disturbance of the retained trees. and positive effects of restoration of abiotic factors (epiphyte diversity, animal activity and diversity, regeneration, spatial structure). my country's forest ecosystems are diverse and rich, and forests are subject to various and frequent natural and human disturbances such as mudslides, fires, hurricanes, and logging.

[0003] The...