Method for promoting natural updating of secondary forest of fir in Minjiang River in western Sichuan

Abstract

The invention discloses a method for promoting natural updating of a secondary forest of fir in the Minjiang River in western Sichuan. The method comprises steps as follows: 1) selection of high-quality seed trees of the tree layer, 2) tending of the tree layer, 3) clearing of trees on the lower layer; 4) seeding supplementing and planting supplementing. By means of the method for promoting natural updating of the secondary forest of the fir in the Minjiang River in western Sichuan, natural updating of the red birch-MinJiang River fir is promoted with a human assistance measure, naturally updated seedlings are kept, the culturing cycle is shortened, growth of trees is promoted, the soil environment and the forest stand structure of the forest are changed, the defects of limitation of natural conditions to natural updating and poor updating effect are overcome, and the natural evolution process from existing forest stand to efficient dark coniferous forests is accelerated.

Description

technical field [0001] The invention relates to the technical field of ecological restoration, in particular to a method for promoting the natural renewal of the Minjiang fir secondary forest in western Sichuan. Background technique [0002] From the 1950s to the early 1980s, forests in western Sichuan suffered from large-scale logging. The logging areas were mainly located at an altitude of 2800-3600 m, which is a typical distribution area of ​​Arrow Bamboo Minjiang fir forest and moss Minjiang fir forest. Arrow bamboo was formed after forest logging The community types in the recovery stages are different from the moss secondary forests. Rubus or arrow bamboo shrubs are mostly formed in the early stage, and red birch-Minjiang fir secondary forests are formed in the later stage. Red birch, as a pioneer tree, is the dominant tree species in the early and middle stages of dark coniferous forest restoration—broad-leaved forest and mixed coniferous-broad-leaved forest stage. D...

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Problems solved by technology

[0003] In view of the problems referred to above, the present invention provides a method for promoting the natural regeneration of Abies Minjiang in western Sichuan, through the method for the natural regeneration of Abies Minjiang in western Sichuan, to realize the artificially assisted measures to promote the natural regeneration of Abies Minjiang, and to retain the naturally regenerated seedlings , shorten the cultivation period, promote the growth of trees, change the soil environment and stand structure of the forest land, overcome the shortcomings of natural regeneration limited by natural conditions, and the regeneration effect is poor, and accelerate the transformation of existing stands to high-efficiency dark coniferous forests natural evolution