湖南省2014年森林植被碳储量、碳密度及其区域空间分布格局

Forest vegetation carbon storage,carbon density and spatial distribution pattern in 2014 in Hunan province

为明晰湖南省现有森林植被碳储量区域分布格局,基于湖南省2014年森林资源年度统计数据,结合材积源生物量法估算了湖南省现有森林植被碳储量、碳密度及其区域空间分布格局。结果表明:(1)湖南省乔木林植被碳储量为145.23×10~6 t,其中阔叶林植被碳储量占47.52%,幼龄林和中龄林植被碳储量之和占69.49%;湖南省乔木林植被平均碳密度为16.26 t·hm^(-2)。(2)湖南省现有森林植被碳储量为196.95×10~6 t,其中乔木林植被碳储量占73.73%,湖南省现有森林植被平均碳密度为16.31 t·hm^(-2),比1995年湖南省森林植被碳密度提高了1.16 t·hm^(-2)。(3)湖南省现有森林植被碳储量、碳密度区域空间分布格局不一致,碳储量呈现出湘西南怀化、邵阳和湘南永州、郴州较高,而碳密度则呈现出益阳、常德、邵阳、郴州较高。森林植被碳储量较高地区,通过封山育林保护措施稳定和提高该区域森林碳储量;而碳储量较低的地区,通过增加地带性树种,优化林分结构组成,提高该区域森林碳储量。

Regional spatial distribution pattern of carbon storage, carbon density were examined in existing forest vegetation in Hunan province of China, based on forest inventory data in 2014, biomass expansion factors（BEF） and carbon concentration of existing main forest types in this region. The result shows that：（1） carbon storage of arboreal forest vegetation was 145.23×106 t C, the highest carbon storage was found in broad-leaved forest vegetation, accounting for 47.52%, and those of the sapling forest and immature forest accounted for 69.49% of the carbon storage of arbor forest. The average carbon density of arbor vegetation was up to 16.26 t C·hm^-2.（2） Carbon storage of existing forest vegetation in Hunan（2014） was 196.95×10^6 t C, the highest carbon storage reserves was found in the arboreal forest vegetation, accounted for 73.73% of the province＇s forest vegetation. Carbon density was 16.31 t C·hm^-2 in the province＇s forest vegetation, and increased 1.16 t C·hm^-2 by compared with 1995.（3） Spatial distribution pattern carbon storage and carbon density of the province＇s forest vegetation was not consistent, the higher carbon storage was found in Huaihua and Shaoyang in the west-southern and Yongzhou and Chenzhou in the southern of Hunan province, while the higher carbon density was found in Yiyang, Changde, Shaoyang and Chenzhou. By taking closed forest protection measures to stabilize and improve the carbon storage in the high carbon storage area of forest vegetation, and increasing the zonal tree species, and optimizing the composition and structure of forest stand to improve carbon storage in the low carbon storage area of forest vegetation.