Transformation method for ecological public-welfare forest in western Sichuan area

Abstract

The invention belongs to the field of structure transformation of artificial forests, and specifically relates to a transformation method for an ecological public-welfare forest in a western Sichuan area. According to a technical scheme of the invention, the transformation method for the ecological public-welfare forest in the western Sichuan area comprises the steps of intermediate cutting and thinning of small forest gaps, and introduction of broad-leaf species and colored-leaf species. The transformation method provided by the invention has extremely little disturbance to the ecological system of an artificial forest, can reduce competition self-consumption among canopy trees, improves the net productivity of trees, promotes regeneration of a forest, increases the structure complexity of the forest, and promotes natural restoration of under-forest environment, soil diversity constitution and food-web relationship. According to the invention, through highly-efficient utilization of multi-layered stereoscopic environmental resources, the utilization efficiency of photosynthetic carbon in the forest is maximized, and carbon accumulation of the ecological system of the forest is further promoted on the basis of reduction of carbon emission.

Description

technical field [0001] The invention belongs to the field of artificial forest structure transformation, and in particular relates to a method for transforming ecological public welfare forests in western Sichuan. Background technique [0002] As of 2013, my country is the country with the largest plantation area in the world, with a total area of ​​6.93×107hm. 2 , volume 2.48×109m 3 , the development rate of plantations is 5.7 times the world average level (State Forestry Administration, 2005), most of which are ecological public welfare forests, but this part of plantations were originally designed according to the demand for timber, and later classified as ecological forests due to the division of ecological function zones. Functional protection needs, thus causing a prominent contradiction between supply and demand. The specific performance is that this kind of initial design density is high, most of the artificial forests are composed of single tree species, the fores...

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Problems solved by technology

[0002] As of 2013, my country is the country with the largest plantation area in the world, with a total area of ​​6.93×107hm. 2 , volume 2.48×109m 3 , the development rate of plantations is 5.7 times the world average level (State Forestry Administration, 2005), most of which are ecological public welfare forests, but this part of plantations were originally designed according to the demand for timber, and later classified as ecological forests due to the division of ecological function zones. Functional protection needs, so the contradiction between supply and demand is prominent

The specific performance is that this kind of initial design density is high, most of the artificial forests are composed of single tree species, the forest hierarchy is simple, the stand canopy is too large, and the environment under the forest is dark and humid. After developing to the middle-aged forest stage, the growth of trees is generally Weakness, small understory vegetation coverage, low species diversity, poor biodiversity, insufficient soil acidification and fertilizer supply capacity, high risk of pests and diseases, low forest productivity, and low carbon sequestration capacity have become typical low-efficiency issues. Ecological public welfare forests, their ecological services and biodiversity protection functions urgently need to be improved and improved through reasonable approaches and methods

However, at this stage, there is obviously a lack of transformation techniques designed for this type of plantation, and traditional thinning methods are mostly used for transformation.

[0003] However, the traditional row or block thinning method has obvious disadvantages: (1) It disturbs the forest land greatly and easily causes secondary disasters, such as soil erosion, etc.

(3) The mechanized operation process is easy to damage the forest soil structure, such as compaction, etc.

(4) Understory vegetation is easily destroyed, and it is difficult to quickly restore surface vegetation

(5) The thinning intensity is high, and it is difficult to quickly restore the productivity of the arbor layer

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