Dong Niu, Silong Wang, Zhiyun Ouyang
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
J Environ Sci (China). 2009;21(6):801-5. doi: 10.1016/s1001-0742(08)62344-x.
Tree species composition was important for carbon storage within the same climate range. To quantify the dynamics of ecosystem carbon allocation as affected by different tree species, we measured the above- and below-ground biomass accumulation in 22 years, as well as the tissue carbon concentrations of trees in Cunninghamia lanceolata plantation and Michelia macclurei plantation. Results indicated that M. macclurei plantation significantly stored more carbon (174.8 tons/hm2) than C. lanceolata plantation (154.3 tons/hm2). Most of the carbon was found in the soil pool (57.1% in M. macclurei plantation, 55.2% in C. lanceolata plantation). Tree and soil component of M. macclurei plantation possessed significantly higher carbon storage than that of C. lanceolata plantation (p <0.05). No significant difference was found in the carbon storage of understory and forest floor. These results suggest that the broadleaved species (M. macclurei) possesses greater carbon sequestration potential than the coniferous species (C. lanceolata) in southern China.
在相同气候范围内，树种组成对碳储存至关重要。为了量化不同树种对生态系统碳分配动态的影响，我们测量了22年间地上和地下生物量的积累，以及杉木人工林和火力楠人工林中树木的组织碳浓度。结果表明，火力楠人工林的碳储量（174.8吨/公顷）显著高于杉木人工林（154.3吨/公顷）。大部分碳存在于土壤库中（火力楠人工林为57.1%，杉木人工林为55.2%）。火力楠人工林的树木和土壤部分的碳储量显著高于杉木人工林（p<0.05）。林下植被和林地的碳储量没有显著差异。这些结果表明，在中国南方，阔叶树种（火力楠）比针叶树种（杉木）具有更大的碳固存潜力。
