湖南主要森林类型碳汇功能及其经济价值评价

Evaluation of Carbon-sequestration Function and Its Economic Value of the Main Forest Types in Hunan

利用湖南省森林资源主要数据汇编(1999—2003年),依据不同森林类型生物量与蓄积量之间的回归方程,对湖南省几种主要森林类型的生物量和碳贮量进行了推算,分析了不同林龄结构的碳密度以及天然林与人工林的碳贮量,并对整个湖南省的森林经济价值进行估算。结果表明:湖南省主要森林类型的总碳贮量为94.935 Tgc,碳汇总经济价值为70 723.26万元,固定CO2的经济效益达259 554.36万元。阔叶树的碳汇能力最强,其次是杉木和马尾松;湖南省的天然林和人工林的碳贮量相差不大,不同龄组碳密度高低排序的基本规律是:过熟林>成熟林>近熟林>中龄林>幼龄林;而中龄林的碳贮量最多,过熟林碳贮量最少。

By using the forest inventory main data of Hunan province from 1999 to 2003, the biomass and carbon storage of the main forest types in Hunan were estimated with the method of regression equation between biomass and volume in different forest types, analyzed the carbon density of different stand age structure and the carbon storage of forest （natural and planted）, and the total economic value of Hunan forest types were also examined. The results shows that the carbon storage of Hunan＇s forest totaled 94.935Tg C, the economic value of carbon sequestration amounts to RMB 70723.26 million yuan. The economic benefit of fixation carbon dioxide is RMB 259 554.36 million yuan. Broad - leaves trees have the strongest function of carbon sequestration, the next are Chinese Fir and Pinus massoniana Lamb. The natural and planted forests in Hunan are close to each other, the basic regularity on carbon density of different age structure from high to low is： over ripeness forest 〉 mature forest 〉 near - mature forest 〉 half - mature forest 〉 young forest. The most carbon storage are middle age forests, and the least are excess mature forests.