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/hm2, 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/hm2, 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/ (hm2 · a), which showed a higher carbon sequestration potential.%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/hm2，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/hm2，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/（hm2· a），具有较高的碳汇潜力。
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