格氏栲人工林和杉木人工林碳库及分配  

Carbon Storage and Allocation in Castanopsis kawakamii and Cunninghamia lanceolata Plantations in Subtropical China

作　　者：杨玉盛[1] 陈光水[1] 王义祥 谢锦升[3] 杨少红[3] 钟羡芳[1] 

机构地区：[1]福建师范大学亚热带资源与环境福建省重点实验室福建师范大学地理科学学院,福州350007 [2]福建省农业科学研究院,福州350002 [3]福建农林大学林学院,福州350003

出　　处：《林业科学》2006年第10期43-47,共5页Scientia Silvae Sinicae

基　　金：高校优秀青年教师奖项目;福建省重大基础研究项目(2000F004);教育部重点科研项目。

摘　　要：对福建省三明市33年生格氏栲人工林和杉木人工林碳库及分配进行研究。结果表明格氏栲人工林碳库为325.9t.hm-2,比杉木人工林的(228.3t.hm-2)高43%。格氏栲和杉木人工林乔木层碳库分别占人工林碳库的65.9%和57.5%,矿质土壤层碳库则分别占32.5%和40.3%,而2种森林的林下植被层、枯枝落叶层、粗木质残体和死细根碳库占人工林碳库均不超过1%。格氏栲人工林的干材(干+皮)碳库分别占乔木层碳库的55.8%,而杉木人工林的则为75.4%。杉木人工林乔木层在6年生前连年碳积累速率略高于格氏栲人工林,但7年生后则低于格氏栲人工林。格氏栲乔木层连年碳积累速率最大值出现时间(15年生时)早于杉木人工林的(10年生时),其碳积累的数量成熟龄(>33年生时)则迟于杉木人工林的(20年生时)。从碳吸存的角度看,格氏栲是一个比杉木更加优良的人工林树种。Carbon storage and component was compared between two 33-year-old plantations of broad-leaved species, Castanopsis kawakamii （ CaK）, and conifer species, Cunninghamia lanceolata （ Chinese Fir, CF）, in Sanming, Fujian Province. Total carbon storage was 325.9 and 228.3 t· hm^-2 , respectively, in the CaK and the CF, of which the tree layer accounted for 65.9 % and 57.5 % and the mineral soil occupied 32.5 % and 40.3 %, respectively. The contributions of the undergrowth, litter layer, coarse woody debris （CWD） and dead fine root to the total carbon pool was no more than 1% . In the CaK, 55.8% of the tree carbon pool was comprised of stem woods plus barks, compared with 75.4% in the CF. Though annual current C accumulation rate in the CaK prior to 6-year-old was slightly lower than in the CF, it gradually exceeded that in the CF after 7-year-old. The annual current C accumulation rate peaked at age 15 in the CaK and at age 10 in the CF. The maturity age for carbon accumulation was 20-year-old in the CF and was longer than 33-year-old in the CaK. With respect to carbon sequestration, CaK was superior to CF as a carbon plantation.

关 键 词：人工林 碳库 格氏栲 杉木 

分 类 号：S718.55[农业科学—林学]