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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8.52×104tC·a-1。
In order to understand the tree carbon storage and its carbon sequestration increment in the evergreen broad-leaved forest in Ailao Mountains, using the vegetation survey data in 2005 and 2008, the arbor carbon stocks of the three main evergreen broad- Carbon sequestration was analyzed. The results showed that the arbor carbon stocks of the native Zhongshan wetland evergreen broad-leaved forest, the Yangsan secondary forest and the natural dry-winter melon were 257.90, 222.95 and 105.39tC · hm-2, respectively. The arborous carbon storage in the mid-mountain wet evergreen broad-leaved forest was mainly (34.68%) with DBH≥91cm. The tree carbon storage in the secondary forest mainly distributed in the tree with the diameter of 21cm≤DBH <41cm (77.29% in Populus davidianae and 69.28% in Dandong melon forest). Thus, the arbor layer of the native Zhongshan evergreen broad-leaved evergreen forest in Ailao Mountain dominates the carbon accumulation. Ailao Mountain subtropical evergreen broad-leaved forest in all three types of forest layers have carbon sequestration increment, even the native Zhongshan wetland evergreen broad-leaved forest, the arbor layer average annual carbon sequestration also reached 2.47tC · hm -2 · a-1. The mean annual carbon sequestration of secondary tree layer was about twice that of primary forest, which indicated that the arbor layer of evergreen broad-leaved evergreen forest in Ailao Mountain had stronger carbon sink. Preliminary estimates show that the annual increment of carbon sequestration for arbor in subtropical evergreen broad-leaved forest in Ailao Mountains is 8.52 × 104tC · a-1.