不同林龄格木人工林碳储量及其分配特征  

Characteristics of carbon storage and its allocation in Erythrophleum fordii plantations with different ages

作　　者：明安刚[1,2,3] 贾宏炎[1,3] 田祖为[1,3] 陶怡[1,3] 卢立华[1,3] 蔡道雄[1,3] 史作民[2] 王卫霞[2] 

机构地区：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600 [2]中国林业科学研究院森林生态环境与保护研究所,北京100091 [3]广西友谊关森林生态系统定位观测研究站,广西凭祥532600

出　　处：《应用生态学报》2014年第4期940-946,共7页Chinese Journal of Applied Ecology

基　　金："十二五"农村领域国家科技计划项目(2012BAD22B0105);林业公益性行业科研专项(201104006);"十一五"广西林业科技项目(桂林科字2009[08]);中国林业科学研究院热带林业实验中心主任基金项目(RL2011-02)资助

摘　　要：在生物量调查的基础上，对广西7、29和32a格木人工林生态系统碳储量及其分配特征进行了研究．结果表明：格木各器官碳含量在509．0～572．4g·kg-1，大小顺序为：树干〉树枝〉树根〉树皮〉树叶；不同林龄间格木人工林的灌木层、草本层和凋落物层碳含量无显著差异；土壤层（0～100em）碳含量随土层深度的增加而降低，随林龄的增加而增大．7、29和32a格木人工林乔木层碳储量分别为21．8、100．0和121．6t·hm-1，各器官碳储量大小顺序与碳含量一致；生态系统碳储量分别为132．6、220．2和242．6t·hm-1，乔木层和土壤层为主要碳库，占生态系统碳储量的97％以上．乔木层碳储量分配随着林龄的增加而增大，土壤碳储量分配则减小，而林龄对灌木层、草本层和凋落物层碳储量分配的影响无明显规律．Carbon storage and its allocation of 7-, 29- and 32-year-old Erythrophleumfordii planta- tion ecosystems in Guangxi were studied on the basis of biomass survey. The results showed that the carbon contents in different organs of E. fordii, ranging from 509.0 to 572.4 g · kg-1 , were in the order of stem 〉 branch 〉 root 〉 bark 〉 leaf. No significant differences in carbon content were ob- served among the shrub, herb and litter layers of the E. fordii plantations with different ages. Car- bon content in the soil layer （0-100 cm） decreased with increasing the soil depth, but increased with increasing the stand age. The carbon storage of the arbor layer was 21.8, 100.0 and 121.6 t ~ hm-2 for 7-, 29- and 32-year-old stands, respectively, and the order of carbon storage allocation in different organs was same as the order of carbon content. The 7-, 29- and 32-year-old E. fordii plantation ecosystems stored carbon at 132.6, 220.2 and 242.6 t ~ hm-2, respectively. The arbor layer and soil layer were the main carbon pods, accounting for more than 97% of carbon storage in the ecosystem. Carbon storage allocation increased in arbor layer but decreased in soil layer with in- creasing the stand age. The influence of stand age on carbon storage allocation in shrub, herb and litter layers did not show a obvious regular pattern.

关 键 词：格木人工林 林龄 碳含量碳储量 分配 

分 类 号：S718.5[农业科学—林学]