洞庭湖区血防林生态系统碳库组分关联分析  

Correlation analysis of carbon components in ecosystem of the snail control and schistosomiasis prevention forest in Dongting Lake

作　　者：李永进[1] 汤玉喜[1] 唐洁[1] 杨艳[1] 黎蕾 LI Yongjin;TANG Yuxi;TANG Jie;YANG Yan;LI Lei(Hunan Academy of Forestry,Changsha 410004,China)

机构地区：[1]湖南省林业科学院

出　　处：《湖南林业科技》2019年第5期1-8,共8页Hunan Forestry Science & Technology

基　　金：国家科技支撑计划项目(2011BAD38B070501);湖南省林业厅科研专项——林业血防科研

摘　　要：根据野外实地调查数据和湖南省森林资源清查资料,洞庭湖流域生态血防林生态系统各组分的碳贮量、碳密度及其关联特征进行了分析。结果表明:血防林乔木层各器官的碳贮量和碳密度分配呈现出树干>树枝>树根>树叶的规律,树干在乔木层的碳贮量和碳密度最大,为1.93 TgC和21.48 t·hm^-2,占整个乔木层的68.76%,而树叶最小,为0.08 TgC和0.84 t·hm^-2,仅占整个乔木层的2.70%。血防林生态系统碳贮量和碳密度分别为23.42 TgC和260.70 t·hm^-2,其中土壤层碳密度、乔木层、林下植被和枯落物分别占整个血防林生态系统碳密度的87.59%、11.98%、0.28%和0.15%。血防林乔木层树干、树枝、树叶、乔木地上部分、乔木层地下部分(树根)的碳密度存在极显著相关性(P<0.01),乔木层、林下植被和枯落物碳密度存在显著性相关(P<0.05),树叶与林下植被存在显著性相关。生态血防林的立木蓄积量与乔木层碳密度存在极显著的线性关系(P<0.001),与林下植被的碳密度拟合曲线系数降低且呈极显著性负相关(P<0.01),与枯落物碳密度的拟合度达到极显著水平(P<0.01)。By using the field investigation data and resource inventory of Hunan forest, we analyzed the correlation of carbon storage and carbon density with different carbon components of the snail control and schistosomiasis prevention forest in Dongting Lake.The result showed that the distribution rule of carbon storage and carbon density of different organs in tree layer showed the same order in the snail control and schistosomiasis prevention forest as stem>branch>root>leaf.The value of carbon storage and carbon density of the stem was 1.93 TgC and 21.48 t·hm^-2 and the value of the leaf was 0.08 TgC and 0.84 t·hm^-2 , respectively accounting for 68.76% and 2.70% of tree layer.The total carbon storage and carbon density in the snail control and schistosomiasis prevention forest was respectively 23.42 TgC and 260.70 t·hm^-2 , among which the carbon density in soil layer, tree layer, understory vegetation and litter layer accounted for 87.59%, 11.98%, 0.28% and 0.15% of the total, respectively.There was extremely significant correlation of carbon density among the stem, branch, leaf, aboveground part and root part( P <0.01).There was significant correlation of carbon density among tree layer, understory vegetation and litter layer( P <0.05).There was significant relationship in carbon density between the leaf and understory vegetation( P <0.05).There was an extremely significant linear relationship between standing stock and carbon density of tree layer( P <0.01).The coefficient of fit curve with standing stock and understory vegetation declined and extremely negatively significant correlated( P <0.01).The degree of fitting of standing stock with litter layer showed extremely significantly( P <0.01).

关 键 词：洞庭湖 血防林 碳密度 关联分析 

分 类 号：S781.5[农业科学—木材科学与技术]