中国杉木林生态系统碳储量研究

 利用中国4次森林资源清查资料以及中国森林生态系统定位观测研究站（CFERN）的实测数据，估算了中国1977-2003年4个时期杉木林生态系统的碳储量，分析了其年龄结构特征、垂直分配结构特征、时空动态格局和贮碳潜力。总碳储量研究结果 1977-1981为 1.09 Gt，1984-1988为1.496 Gt，1994-1998为2.446 Gt，1999-2003为2.866 Gt。江西、湖南、浙江、福建、云南、广西和广东7省的杉木林碳储量约占84%～86%。幼、中龄杉木林碳储量在79%~83.90%之间，随着杉木林的演替成熟，我国杉木林生态系统是一个潜在的碳库。在垂直分布上，乔木层碳储量占9.38%~10.63%，林下植被占0.6%~0.7%，土壤占87.99%~89.02%，枯落物占0.68%~0.78%，不同时期杉木林生态系统碳储量的垂直分配结构基本相似。1999-2003期间中国杉木林生态系统碳素现存量为2.866 Gt，一个龄级期（10 a）后碳储量将达到3.772 Gt，并以90.63 Mt·a^-1的平均积累速率递增，是一个贮存潜力大，增长速率快的碳库。

Carbon Storage of Chinese Fir Forest Ecosystem in China

Forest resources inventories materials and data from China Forest Ecosystem Location Research Network (CFERN) were prepared for estimating 4 periods of carbon storage of Chinese fir forest ecosystem from 1977 to 2003.We analyzed their ages structure, vertical distribution, spatial and temporal patterns and its potential carbon storage. Carbon storage of Chinese fir forest ecosystem were, 1.09 Gt C in 1977-1981, 1.496 Gt C in 1984-1988, 2.446 Gt C in 1994-1998, 2.866 Gt C in 1999-2003, they were increasing year by year. Carbon storage of Jiangxi, Hunan, Zhejiang, Fujian, Yunnan, Guangxi and Guangdong accounted for between 84% and 86%,it is a huge carbon pool in China. Carbon storage of young growth and half-mature trees were the major carbon pools of Chinese fir forest, with the percentages between 79 and 83.9, they will be a large carbon pool as trees grew elder and elder. In Chinese fir forests, carbon storage of trees were between 9.38% and 10.63%,trees under Chinese fir were between 0.6% and 0.7%,soil were between 87.99% and 89.02%,litter were between 0.68% and 0.78%.Thus, they were similar vertically. Carbon storage was 2.866 Gt from 1999 to 2003,and it will be 3.772 Gt C after ten years, there will be 90.63 Mt carbon fixed by Chinese fir forest every year, henceforth, Chinese fir forest can store more and more carbon, and it will be larger and larger soon.