Phoebe bournei natural secondary forest health evaluation model and health evaluation method

Abstract

The invention provides a Phoebe bournei natural secondary forest health evaluation model. In the health evaluation model, H is a forest health index and represents a comprehensive evaluation value of a health condition; Bj represents a value of a jth index after dimensionalization; Wj represents a total sorting weight value of the jth index; and n is the total index number; and each index comprises unit area accumulation amount, forest stand canopy density, natural updating, forest growth vigor, community structure, forest layer structure, tree species structure, diameter level structure, forest pest and disease damage, forest fire, under-forest vegetation coverage, species diversity, Phoebe bournei mother tree plant number, forest naturalness, forest land quality and litter thickness. According to the Phoebe bournei natural secondary forest health evaluation model, a health evaluation index system and a health evaluation model of the Phoebe bournei natural secondary forest are constructed; the Phoebe bournei natural secondary forest in Jiangxi Province is evaluated; a main countermeasure for promoting health operation is provided according to an evaluation result; and a scientific basis is provided for protection and sustainable operation of the Phoebe bournei natural secondary forest.

Description

technical field [0001] The invention belongs to the field of forest protection and forest ecosystem health, and in particular relates to a health evaluation model and a health evaluation method for the natural secondary forest of Nan Nan. Background technique [0002] The eighth continuous inventory of forest resources in my country showed that the forest coverage rate was 22.96%, and the forest stock volume was 89.79m 3 ·hm -2 , while the global forest coverage rate is 31%, and the forest volume is 131m 3 ·hm -2 . In general, the total amount of forest resources in my country is relatively insufficient, the productivity is not high, and the overall quality of forests needs to be improved. The development of my country's forestry is still facing huge pressures and challenges. [0003] Natural secondary forest is a type of forest that has been restored with the help of natural forces after the original forest has been destroyed by man-made or natural factors. Natural sec...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a health evaluation model and health evaluation method of Nannan natural secondary forest, to solve the technical problem of lacking the health evaluation index system and evaluation method of Nannan natural secondary forest in the prior art

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