气候变化领域集成服务门户(CCPortal): Measurement of N-2, N2O, NO, and CO2 Emissions from Soil with the Gas-Row-Soil-Core Technique

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DOI	10.1021/es1036578
	Measurement of N-2, N2O, NO, and CO2 Emissions from Soil with the Gas-Row-Soil-Core Technique
	Wang, Rui; Willibald, Georg; Feng, Qi; Zheng, Xunhua; Liao, Tingting; Brueggemann, Nicolas; Butterbach-Bahl, Klaus
发表日期	2011
ISSN	0013-936X
卷号	45 期号:14
英文摘要	Here we describe a newly designed system with three stand-alone working incubation vessels for simultaneous measurements of N-2, N2O, NO, and CO2 emissions from soil. Due to the use of a new micro thermal conductivity detector and the redesign of vessels and gas sampling a so-far unmatched sensitivity (0.23 mu g N-2-N h(-1) kg(-1) ds or 8.1 mu g N-2-N m(-2) h(-1)) for detecting N-2 gas emissions and repeatability of experiments could be achieved. We further tested different incubation methods to improve the quantification of N-2 emission via denitrification following the initialization of soil anaerobiosis. The best results with regard to the establishment of a full N balance (i.e., the changes in mineral N content being offset by simultaneous emission of N gases) were obtained when the anaerobic soil incubation at 25 degrees C was preceded by soil gas exchange under aerobic conditions at a lower incubation temperature. The ratios of N and C gas emission changed very dynamically following the initialization of anaerobiosis. For soil NO3- contents of 50 mg N kg(-1) dry soil (ds) and dissolved organic carbon (DOC) concentrations of approximately 300 mg C kg(-1) ds, the cumulative emissions of N-2, N2O, and NO were 24.3 +/- 0.1, 12.6 +/- 0.4, and 10.1 +/- 0.3 mg N kg(-1) ds, respectively. Thus, N gas emissions accounted (on average) for 46.2% (N-2), 24.0% (N2O), and 19.2% (NO) of the observed changes in soil NO3-. The maximum N-2 emission reached 1200 mu g N h(-1) kg(-1) ds, whereas the peak emissions of N2O and NO were lower by a factor of 2-3. The overall N-2:N2O and NO:N2O molar ratios were 1.6-10.0 and 1.6-2.3, respectively. The measurement system provides a reliable tool for studying denitrification in soil because it offers insights into the dynamics and magnitude of gaseous N emissions due to denitrification under various incubation conditions.
学科领域	Engineering; Environmental Sciences & Ecology
语种	英语
WOS研究方向	Engineering, Environmental ; Environmental Sciences
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111634
作者单位	Karlsruhe Inst Technol, Inst Meteorol & Climate Res IMK IFU, D-82467 Garmisch Partenkirchen, Germany
推荐引用方式 GB/T 7714	Wang, Rui,Willibald, Georg,Feng, Qi,et al. Measurement of N-2, N2O, NO, and CO2 Emissions from Soil with the Gas-Row-Soil-Core Technique[J]. 中国科学院西北生态环境资源研究院,2011,45(14).
APA	Wang, Rui.,Willibald, Georg.,Feng, Qi.,Zheng, Xunhua.,Liao, Tingting.,...&Butterbach-Bahl, Klaus.(2011).Measurement of N-2, N2O, NO, and CO2 Emissions from Soil with the Gas-Row-Soil-Core Technique.ENVIRONMENTAL SCIENCE & TECHNOLOGY,45(14).
MLA	Wang, Rui,et al."Measurement of N-2, N2O, NO, and CO2 Emissions from Soil with the Gas-Row-Soil-Core Technique".ENVIRONMENTAL SCIENCE & TECHNOLOGY 45.14(2011).