极地研究2012，Vol.24Issue(3)：215-225,11.DOI:10.3724/SP.J.1084.2012.00215
南极海洋动物粪土源N2O稳定同位素实验研究
EXPERIMENTAL STUDIES ON THE STABLE ISOTOPES OF N2O EMITTED FROM SEA ANIMAL COLONY SOILS IN COASTAL ANTARCTICA
摘要
Abstract
N2O is an important greenhouse gas, which mainly is emitted from soils during nitrification and denitrification processes. Measurement of natural abundances of N2O stable isotopes has proved to be an effective method to distinguish N2O sources from nitrification and denitrification. In this paper, we report on a study of soils collected from seal colony of Fildes Peninsula (HS and GS) , penguin colony of Ardley Island ( AB and AF) and the Emperor penguin colony ( DQ and DQT) in Antarctica. We examined the isotopic compositions of N2O through laboratory incubation experiments under N2 and under ambient air conditions, respectively. Results showed that much more N2O was formed in the soils under N2 incubation than under ambient air incubation. For most treatments, the soil emitted N2O was 15N-depleted compared to local ambient air N2O. The N2O concentration often leveled off or even decreased, and was accompanied by the increases in d15N and d18O of the remaining N2O. Soil water content and pH also affected the d15N and d18O values. Our results showed that denitrification is the predominant path for N2O production in the soil system.关键词
N2O/南极土壤/硝化作用/反硝化作用/δ15N和δ18OKey words
N2O/Antarctic soils/nitrification and denitrification/d15O and d18O引用本文复制引用
白波,朱仁斌,徐华,刘雅淑..南极海洋动物粪土源N2O稳定同位素实验研究[J].极地研究,2012,24(3):215-225,11.基金项目
国家自然科学基金(41076124)、中国科学院知识创新工程(KZCX2-YW-QN510)、国家海洋局极地科学重点实验室开放研究基金(KP200804)和中央高校基本科研业务费专项资金(WK2060190007)资助 （41076124）
