11年生香梓楠人工林生态系统碳储量及其分配格局  

The Carbon Storage and Distribution Patterns of 11-year-old Michelia hedyosperma Plantation Ecosystem

作　　者：史雅楠[1] 吴庆标[1] 吴敏 

机构地区：[1]广西大学林学院,广西南宁530004 [2]广西壮族自治区南宁树木园,广西南宁530031

出　　处：《林业与环境科学》2016年第5期52-57,共6页Forestry and Environmental Science

基　　金：广西区自然科学基金项目"速生阶段珍贵树人工林生产力及元素循环研究"(2012GXNSFAA053053)

摘　　要：对11 a生香梓楠(Michelia hedyosperma)人工林生态系统的碳素含量、碳储量及其空间分配特征进行了研究。结果表明:(1)香梓楠各植物器官碳素平均含量的变化范围在450.98~514.45 g/kg之间,各器官碳含量的排列次序为:干材>根蔸>粗根>枝>中根>细根>叶>皮。(2)香梓楠人工林生态系统总碳储量为182.32 t/hm^2,其中土壤层所占比例最高,达77.62%,灌草层所占比例最少,仅占0.30%,各生物层次碳储量总体表现为:土壤层>乔木层>凋落物层>灌草层。(3)香梓楠人工林生态系统总生物量为81.68 t/hm^2,乔木层、灌草层和凋落物层分别占95.68%、1.45%和2.87%,表现为乔木层>凋落物层>灌草层。(4)香梓楠人工林分乔木层年净生产力和净固碳量分别为7.10和3.56 t/(hm^2·a),具有较高的碳汇潜力。The characteristics of content, storage and spatial distribution of carbon in the ecological system of 11-year-old Michelia hedyosperma plantation were studied. The results showed that：（1）The average carbon content of M. hedyosperma in different plant organs was between 450.98~514.45 g/kg, the order of carbon content of every organ was： tree trunk root pocket thick root branch middle root thin root leaf trunk bark.（2）The ecosystem carbon storage of M. hedyosperma plantation was 182.32 t/hm^2, the soil layer had the highest proportion, up to 77.62%; the shrub and grass layer was the least, accounted for merely 0.30%. The overall performance of the biological level of carbon storage follows the order：soil layer tree layer litter layer shrub and grass layer.（3）The ecosystem biomass of M. hedyosperma plantation was 81.68 t/hm^2, tree layer, shrub and grass layer and litter layer accounted for 95.68%, 1.45% and 2.87%,as the order： tree layer litter layer shrub and grass layer.（4）The net productivity and annual net carbon fixed quantity of M. hedyosperma plantation were 7.10 and 3.56 t/（hm^2· a）, which showed a higher carbon sequestration potential.

关 键 词：香梓楠 生物量 碳含量 碳储量 分配格局 

分 类 号：S718.566[农业科学—林学]