论文部分内容阅读
为阐明安徽省不同林龄的森林生态系统的碳储量现状,以及现有自然环境条件下顶极森林生态系统的固碳潜力,采用野外样地调查和BIOME4模型方法对此进行研究。安徽省森林生态系统的现状总碳储量为714.5 Tg C,其中植被碳402.1 Tg C、土壤碳312.4 Tg C。从幼龄林至过熟林的生长过程中,森林生态系统的总碳密度和植被碳密度都呈现增长趋势。但土壤碳密度从幼龄林至近熟林阶段呈增加趋势,近熟林以后出现减少趋势。安徽省幼龄林和中龄林占森林总面积的75%,若幼、中龄林发展到近熟林阶段,将增加125.4 Tg C。BIOME4模拟显示:当森林发展到气候顶极森林时,安徽省森林生态系统将增加245.7 Tg C,即总固碳潜力包括植被固碳153.7 Tg C,土壤固碳92.0 Tg C。
In order to clarify the status quo of carbon storage of forest ecosystems of different ages in Anhui Province and the carbon sequestration potential of the top forest ecosystems under the existing natural environment, this study was conducted by the field survey and the BIOME4 model. The current status of total forest ecosystem in Anhui Province is 714.5 Tg C, including 402.1 Tg C of vegetation carbon and 312.4 Tg C of soil carbon. From the growth of young to over mature forest, the total carbon density and the vegetation carbon density of forest ecosystem all showed an increasing trend. However, the soil carbon density increased from young to near mature forest, and decreased after near-mature forest. The young and middle-aged forests in Anhui Province account for 75% of the total forest area. If the young and middle-aged forests are near mature, they will increase 125.4 Tg C. BIOME4 simulations show that forest ecosystems in Anhui Province will increase by 245.7 Tg C as forests develop into climax forests, indicating that the total carbon sequestration potential includes 153.7 Tg C of vegetation and 92.0 Tg C of soil.