New high precision approach for measuring 15 N–N 2 gas fluxes from terrestrial ecosystems
作者: Wendy H. YangAndrew C. McDowellPaul D. BrooksWhendee L. Silver
作者单位: 1Ecosystem Sciences Division, Department of Environmental Science, Policy, and Management, 130 Mulford Hall #3114, University of California, Berkeley, CA 94720, USA
2Center for Stable Isotope Biogeochemistry, Department of Integrative Biology, 3060 Valley Life Sciences Building #3140, University of California, Berkeley, CA 94720, USA
刊名: Soil Biology and Biochemistry, 2014, Vol.69 , pp.234-241
来源数据库: Elsevier Journal
DOI: 10.1016/j.soilbio.2013.11.009
关键词: 15 N tracerDenitrificationDinitrogenGas chromatographyMolecular sieveN 2 :N 2 O ratioSoil
英文摘要: Abstract(#br)Dinitrogen (N 2 ) production from denitrification and anaerobic ammonium oxidation represents a loss of reactive nitrogen (N) from terrestrial and aquatic ecosystems to the atmosphere. The large 15 N additions required to detect 15 N 2 production against the high atmospheric background precludes the use of the 15 N tracer technique in natural terrestrial ecosystems. We present an isotope ratio mass spectrometry technique that dramatically improves the precision of 15 N 2 measurements. The approach uses gas chromatography to remove oxygen and gas purification techniques to remove water vapor and trace gases that can interfere with 15 N 2 analysis. The analytical precision for manual gas sample injection was 0.018‰ δ 15 N; this translates to a minimum detectable N 2 flux of...
全文获取路径: Elsevier  (合作)
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影响因子:3.654 (2012)

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