【作者】 叶功富； 郭瑞红； 张立华； 林武星； 聂森；

【Author】 Guo Ruihong(Institute of Applied Ecology Chinese Academy of Sciences,Shenyang 110016,China);Ye Gongfu(Fujian Academy of Foresty,Fuzhou 350012,China)

【机构】 福建省林业科学研究院； 中国科学院沈阳应用生态研究所；

【摘要】 对滨海沙地木麻黄幼龄林、中龄林和成熟林生态系统中各组分的含碳率和碳贮量进行了比较研究。结果表明,不同发育阶段木麻黄乔木层和凋落物层的含碳率介于45.40～50.50%,表现为中龄林>成熟林>幼龄林,而O～100cm土壤层含碳率则表现为成熟林>中龄林>幼龄林,随林龄增大,木麻黄林乔木层、凋落物层和土壤层碳贮量均逐渐增加,决定了生态系统总碳贮量亦逐渐增加。成熟林生态系统碳贮量为222.69t·hm-2,分别是幼龄林和中龄林的2.90倍和1.36倍,这种差异主要是由乔木层碳贮量的差异引起的。木麻黄人工林年净固碳量差异主要体现在乔木层,凋落物年固碳量亦存在显著差别,但比重小于乔木层。更多还原

【Abstract】 Casuarina equisetifolia is one of the most important tree species of protective plantations on coastal sandy in South China,playing an important role in mitigating the rise of atmospheric CO2.The carbon content and carbon storage of Casuarina equisetifolia at different growing stages were measured.The results were showed as follows:The carbon contents of the tree,litter were in the sequence of MAP(middle—aged plantation)> MP(mature—plantation)> YP(young plantation),whereas the carbon content of soil layer was in the sequence of MP> MAP> YP.The carbon storage of Casuarina equisetifolia plantation ecosystem increased with the increment of age,of which the M P was2.90times as that of YP,and 1.36 times as that of MAP respectively,and most of the differences among forest ecosystems occurred in the tree layer.The difference of net carbon stock mainly in tree layer,it was also significant in litter layer,but less than that in tree layer.更多还原