中文摘要：

为了解哀牢山亚热带常绿阔叶林的乔木碳储量及其固碳增量，利用2005和2008年的植被调查数据，对哀牢山3种主要常绿阔叶林的乔木碳储量及其固碳增量进行了分析。结果表明：原生的中山湿性常绿阔叶林、滇山杨次生林和旱冬瓜次生林的乔木碳储量分别为257．90、222．95和105．39tC·hm^-2；中山湿性常绿阔叶林乔木碳储量主要存储在DBH≥91cm的乔木中（34．68％）；而次生林的乔木碳储量主要分布在径级21cm≤DBH〈41cm的乔木中（滇山杨林77．29％；旱冬瓜林69．28％）。由此可见，哀牢山地区原生的中山湿性常绿阔叶林乔木层在碳蓄积方面占主导优势。哀牢山亚热带常绿阔叶林的3个森林类型乔木层均具有固碳增量，即使是原生的中山湿性常绿阔叶林，其乔木层年平均固碳增量也达2．47tC·hm^-2·a^-1；次生林乔木层的年平均固碳增量约为原生林的2倍，显示了哀牢山亚热带常绿阔叶林乔木层具有较强的碳汇增量。初步估算，哀牢山亚热带常绿阔叶林林区内每年乔木固碳增量为8．52×10^4tC·a^-1。

英文摘要：

In order to understand the tree layer carbon storage and sequestration in the subtropical evergreen broadleaf forests in Ailao Mountain, an analysis was made on the tree layer carbon storage and sequestration in three dominant forests in the Mountain, based on the field surveys in 2005 and 2008. The tree layer carbon storage in the primary evergreen broadleaf forest, secondary Populus bonatii forest, and secondary Alnus nepalensis forest in the Mountain was 257.90, 222.95, and 105.39 t C · hm^-2, respectively. The tree layer carbon storage of the primary evergreen broadleaf forest was mainly contributed by the trees with DBH ≥91 cm （34.68%）, while that of the two secondary forests was mainly contributed by the trees with DBH from 21 em to 41 em （77.29% for P. bonatii secondary forest, and 69.28% for A. nepalensis secondary forest） , suggesting that the tree layer of primary evergreen broadleaf forest played an important role in the carbon storage in Ailao Mountain. The tree layers of the three forests all had the capability of carbon sequestration. The mean annual increment of tree layer carbon sequestration in primary evergreen broadleaf forest was 2.47 t C · hm^-2 · a^-1, and that in the two secondary forests was about two times of the primary evergreen broadleaf forest, suggesting a great potential of carbon sequestration in secondary forests. Based on the above-mentioned results, it was estimated that the mean annual increment of tree layer carbon sequestration within the Ailao Mountain National Nature Reserve was 8.52×10^4tC·a^-1.