湖北省主要森林类型生态系统生物量与碳密度比较  

Biomass and carbon density of main forest ecosystems in Hubei Province

作　　者：胡青[1,2,3] 汪思龙[1,2] 陈龙池[1,2] 张伟东[1,2] 宫超[3] 

机构地区：[1]中国科学院会同森林生态试验站,沈阳110016 [2]森林与土壤生态国家重点实验室,中国科学院沈阳应用生态研究所,沈阳110164 [3]中国科学院研究生院,北京100049

出　　处：《生态学杂志》2012年第7期1626-1632,共7页Chinese Journal of Ecology

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-YW-305-05)资助

摘　　要：利用野外调查数据对湖北省封山育林下的次生林、次生林、人工林森林生态系统碳密度进行了分析,结果表明:封山育林下的次生林、次生林和人工林生态系统乔木层平均碳密度分别为133.87、73.42和111.62t·hm-2,灌木层平均碳密度分别为1.65、1.40和1.52t·hm-2,草本层平均碳密度分别为0.13、0.09和0.13t·hm-2,枯落物层平均碳密度分别为0.47、1.34和0.93t·hm-2,乔木层碳密度作为生态系统碳储量的主要贡献者占总生物碳密度的98.35%、96.29%和97.74%,林下植被(灌木层和草本层)碳密度分别占1.31%、1.95%和1.44%,凋落物层碳密度分别占0.34%、1.76%和0.82%。土壤(0～100cm)碳密度平均值分别为57.04、66.92和54.12t·hm-2,土壤碳密度的60%储存在0～40cm土壤中,并随土层深度增加,各层次土壤碳密度逐渐减少。森林生态系统的乔木层、灌木层、草本层、凋落物层生物量和土壤层碳密度均表现出:封山育林下的次生林、次生林大于人工林。封山育林下的次生林、次生林和人工林碳密度分布序列为土壤(0～100cm)>乔木层>灌木层>草本层>枯落物层。可见,封山育林下的次生林更有助于提高森林碳汇,实施近自然林经营是提升该区域森林碳汇能力的重要途径。Based on the field investigation data,this paper analyzed the carbon storage and carbon density in the secondary forests under closing hillsides to facilitate afforestation,secondary forests,and plantation forests in Hubei Province.The mean carbon storage of the tree layers in the secondary forests under closing hillsides to facilitate afforestation,secondary forests,and plantation forests was 133.87,73.42 and 111.62 t·hm-2,the mean carbon storage of shrub layers was 1.65,1.40 and 1.52 t·hm-2,the mean carbon storage of herb layers was 0.13,0.09 and 0.13 t·hm-2,and the mean carbon storage of litter layers was 0.47,1.34 and 0.93 t·hm-2,respectively.With the largest share in trunk,the carbon stored in tree layers was the main contributor to the ecosystem C storage,accounting for 98.35%,96.29% and 97.74% of the total biomass C in the secondary forests under closing hillsides to facilitate afforestation,secondary forests,and plantation forests,while the carbon storage in understory vegetation（shrub ＋ herb） and litters had the least share,accounting for 1.31%,1.95%,1.44% and 0.34%,1.76% and 0.82%,respectively.The soil carbon storage decreased with depth,and 60% of the total was accumulated in 0-40 cm layer.The carbon density in 0-100 cm soil of the secondary forests under closing hillsides to facilitate afforestation,secondary forests,and plantation forests was averagely 57.04,66.92 and 54.12 t·hm-2,respectively,and also decreased with increasing depth.The biomass and the soil carbon storage were larger in the secondary forests under closing hillsides to facilitate afforestation and the secondary forests than in the plantation forests,and the carbon density was in the order of soil（0-100 cm） 〉 tree layer 〉 shrub layer 〉 herb layer 〉 litter layer,indicating that secondary forests under closing hillsides to facilitate afforestation was more helpful to improve forest carbon sink,and the implement of near-nature forest management would be the main approach in promoting the carbon sequestration capaci

关 键 词：封山育林 次生林 人工林 生物量 

分 类 号：S718.55[农业科学—林学]