冕宁县森林碳储量现状估算与分析

Estimation and Analysis of Forest Carbon Storage in Mianning County

在对四川冕宁2015年森林资源二类调查数据分析的基础上,利用生物量扩展因子法和改良的计算参数,从不同龄组、林型等方面,对冕宁县森林资源的碳储量及碳密度进行了估算。结果表明:冕宁县2015年森林碳储量总量为10.40Tg,其中乔木林碳储量为8.40Tg,碳密度为34.36 Mg·hm-2,乔木林具有较强的固碳能力,主要优势树种(组)的碳储量从高到低分别为近熟林、过熟林、成熟林、中龄林、幼龄林,同一龄级、不同类型乔木林的碳汇能力表现各异,云南松、云冷杉、丝栗等固碳能力较强,天然林碳储量大于人工林。

Based on the data from forest inventory in 2015,the arbor forest carbon storage and carbon density in Mianning county of Sichuan Province were estimated using biomass expansion factor method and calculation parameters were improved.The results showed that total carbon storage of forest is 10.40Tg,of which arbor forest is 8.40 Tg,with carbon density at 34.36 Mg.hm-2 showing absolute dominance in nitrogen fixation capacity.In the main dominant tree species(groups),the carbon storage from high to low are near-mature forest,mature forest,middle aged forest,overmature forest and young forest.The carbon sink function of different trees in the same age is different.Pinus yunnanensis,Picea asperata and Abies fabri had strong carbon sequestration ability.Furthermore,natural forest was stronger than artificial forest in carbon storage.