应用生态学报2017，Vol.28Issue(7)：2231-2238,8.DOI:10.13287/j.1001-9332.201707.004
典型滨岸草地生态系统碳稳定同位素组成及分布特征
Composition and distribution characteristics of stable carbon isotope in typical riparian grassland ecosystem
摘要
Abstract
Plant-soil carbon stable isotope characteristics of riparian herbaceous ecosystem were analyzed by measuring the δ13C value of plant tissues from four typical riparian herbaceous plants,which were Cynodon dactylon,Trifolium repens,Festuca arundinacea and Imperata cylindrical,and that of soil organic carbon (SOC) from different vertical depths along Dongfeng Port River in Qingpu District,Shanghai.The result showed that T.repens and F.arundinacea were C3 plants while C.dactylon and I.cylindrical were C4 plants.There was no significant difference between the δ13C value of stem and leaf,litter and root of the four herbaceous plants.The surface SOC δ13C value of C3 and C4 plants strips showed different trends with soil depth,which could be related to the background SOC δ13C value,soil carbon stable isotope fractionation effect and plant root distribution depth as well.Plant input was the main source of SOC and the δ13C composition of plant organisms had direct effect on the SOC δ13C value.The δ13C value of plant components were significantly correlated with the δ13C value of SOC.The SOC content and δ13C value were significantly correlated in the four herbaceous plants strips.The SOC content and δ13C value showed linear negative correlation in C3 plant strips and linear positive correlation in C4 plant strips.关键词
滨岸生态系统/C3/C4草本植物/土壤有机碳/碳稳定同位素Key words
riparian ecosystem/C3/C4 herbaceous plants/soil organic carbon (SOC)/stable carbon isotope引用本文复制引用
吴健,沙晨燕,王敏,吴建强,谭娟,齐晓宝,黄沈发..典型滨岸草地生态系统碳稳定同位素组成及分布特征[J].应用生态学报,2017,28(7):2231-2238,8.基金项目
本文由上海市科学技术委员会科研计划项目(STCSM-13231203600)资助 This work was supported by the Research Project of Science and Technology Commission of Shanghai Municipality (STCSM-13231203600). （STCSM-13231203600）
