莫莉萍　周慧杰　刘云东等

摘要 以典型区域茅尾海红树林自然保护区为样区，采样估算广西红树林湿地沉积层有机碳储量。结果表明，红树林土壤有机碳含量平均值从大到小排列顺序为混交林>桐花>光滩，0～50 cm土层分别为2.797%、1.218%和0.870%；红树林湿地土壤有机碳储量由大到小依次为混交林>桐花>光滩，混交林、桐花和光滩0～50 cm土层土壤有机碳储量分别为142.79、47.25和47.21 t/hm2。与周边红树林地区相比，钦州湾混交林的各层土壤碳储量与深圳湾红树林和海口的白骨壤接近，但远低于深圳福田的秋茄林和海口的桐花，而钦州湾桐花、光滩的各层土壤碳储量与深圳湾光滩较接近。

关键词 土壤有机碳储量；土壤有机碳；红树林湿地 ；广西

中图分类号 S714.5 文献标识码 A 文章编号 0517-6611（2015）15-081-04

An Estimation of Soil Organic Carbon Storage in Mangrove Wetlands of Guangxi

MO Liping1，2，3，4， ZHOU Huijie3，5*， LIU Yundong5 et al

（1.Guangxi Key Lab of Mangrove Conservation and Utilization， Guangxi Mangrove Research Center， Beihai， Guangxi 536000； 2. School of Environment and Life Science， Guangxi Teachers Education University， Nanning， Guangxi 530001； 3. Key Laboratory of Beibu Gulf Environment Change and Resources Use， Ministry of Education， Nanning， Guangxi 530001； 4.School of Earth Science and Geological Engineering， Sun Yatsen University， Guangzhou， Guangdong 510275； 5. School of Geography and Planning， Guangxi Teachers Education University， Nanning， Guangxi 530001）

Abstract Taking Mao Wei Sea mangrove nature reserve as a typical sample area， organic carbon storage of mangrove wetland sediment was estimated according to sample analysis. The results showed that： the order of soil organic carbon storage was mixed species> Aegiceras corniculatum > bare flat， the average content organic carbon in the mangorove wetland soil （0-50 cm depth） were 2.797%， 1.218% and 0870% respectively； The order of soil organic carbon storage per unit area is mixed species> Aegiceras corniculatum > bare flat， carbon storage in the mangrove wetland soil （0-50 cm depth）were 142.79， 47.25 and 47.21 t/hm2 respectively. Contrast with the mangrove wetland surrounding area， soil carbon storage of mixed species in Qinzhou Bay close to that of Vicennia mariana in Shenzhen Bay and Haikou， but much lower than that of Kandelia candel in Shenzhen Futian and Aegiceras corniculatum in Haikou. The soil carbon storage of Aegiceras corniculatum and bare flat in Qinzhou Bay is closer to that of bare flat in Shenzhen Bay .

Key words Soil organic carbon storage； Soil organic carbon； Mangrove wetland； Guangxi

隨着全球气候变化与环境问题的日益突出，碳循环问题普遍受到科学界和国际社会的关注，日益成为全球变化与地球科学研究领域的学术前沿与热点问题[1-2]。如何利用陆地生态系统进行固碳活动也成为全球所关心的话题。研究表明，湿地生态系统是一个巨大的碳汇。固碳是湿地生态系统一项重要的服务功能[3]。全球所有湿地面积之和仅占地球陆地面积的4%～6%，但湿地土壤和泥炭却是全球陆地系统最大的碳库，碳储量约为770×108 t，占陆地生物圈碳素的35%[4]。湿地生态系统的碳汇效应研究成为全球碳循环研究中的核心内容之一。

红树林湿地是热带、亚热带海岸潮间带的重要湿地类型。该湿地处于海陆交界带，也是全球变化的生态敏感区。全球分布的红树林……