Greenhouse gas budget (CO2, CH4 and N2O) of intensively managed grassland following restoration

Greenhouse gas budget (CO2, CH4 and N2O) of intensively managed grassland following restoration

© 2014 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 20(2014), 6 vom: 07. Juni, Seite 1913-28
1. Verfasser: Merbold, Lutz (VerfasserIn)
Weitere Verfasser: Eugster, Werner, Stieger, Jacqueline, Zahniser, Mark, Nelson, David, Buchmann, Nina
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't QCLAS SwissFluxNet carbon dioxide carbon sink eddy covariance methane nitrous oxide ploughing mehr... Air Pollutants Gases Carbon Dioxide 142M471B3J Nitrous Oxide K50XQU1029 Methane OP0UW79H66
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100 1 |a Merbold, Lutz  |e verfasserin  |4 aut 
245 1 0 |a Greenhouse gas budget (CO2, CH4 and N2O) of intensively managed grassland following restoration 
264 1 |c 2014 
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500 |a Date Completed 31.12.2014 
500 |a Date Revised 04.01.2021 
500 |a published: Print-Electronic 
500 |a ErratumIn: Glob Chang Biol. 2017 Jul;23 (7):2928. - PMID 28573752 
500 |a Citation Status MEDLINE 
520 |a © 2014 John Wiley & Sons Ltd. 
520 |a The first full greenhouse gas (GHG) flux budget of an intensively managed grassland in Switzerland (Chamau) is presented. The three major trace gases, carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) were measured with the eddy covariance (EC) technique. For CO2 concentrations, an open-path infrared gas analyzer was used, while N2O and CH4 concentrations were measured with a recently developed continuous-wave quantum cascade laser absorption spectrometer (QCLAS). We investigated the magnitude of these trace gas emissions after grassland restoration, including ploughing, harrowing, sowing, and fertilization with inorganic and organic fertilizers in 2012. Large peaks of N2O fluxes (20-50 nmol m(-2) s(-1) compared with a <5 nmol m(-2) s(-1) background) were observed during thawing of the soil after the winter period and after mineral fertilizer application followed by re-sowing in the beginning of the summer season. Nitrous oxide (N2O) fluxes were controlled by nitrogen input, plant productivity, soil water content and temperature. Management activities led to increased variations of N2O fluxes up to 14 days after the management event as compared with background fluxes measured during periods without management (<5 nmol m(-2) s(-1)). Fluxes of CO2 remained small until full plant development in early summer 2012. In contrast, methane emissions showed only minor variations over time. The annual GHG flux budget was dominated by N2O (48% contribution) and CO2 emissions (44%). CH4 flux contribution to the annual budget was only minor (8%). We conclude that recently developed multi-species QCLAS in an EC system open new opportunities to determine the temporal variation of N2O and CH4 fluxes, which further allow to quantify annual emissions. With respect to grassland restoration, our study emphasizes the key role of N2O and CO2 losses after ploughing, changing a permanent grassland from a carbon sink to a significant carbon source 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a QCLAS 
650 4 |a SwissFluxNet 
650 4 |a carbon dioxide 
650 4 |a carbon sink 
650 4 |a eddy covariance 
650 4 |a methane 
650 4 |a nitrous oxide 
650 4 |a ploughing 
650 7 |a Air Pollutants  |2 NLM 
650 7 |a Gases  |2 NLM 
650 7 |a Carbon Dioxide  |2 NLM 
650 7 |a 142M471B3J  |2 NLM 
650 7 |a Nitrous Oxide  |2 NLM 
650 7 |a K50XQU1029  |2 NLM 
650 7 |a Methane  |2 NLM 
650 7 |a OP0UW79H66  |2 NLM 
700 1 |a Eugster, Werner  |e verfasserin  |4 aut 
700 1 |a Stieger, Jacqueline  |e verfasserin  |4 aut 
700 1 |a Zahniser, Mark  |e verfasserin  |4 aut 
700 1 |a Nelson, David  |e verfasserin  |4 aut 
700 1 |a Buchmann, Nina  |e verfasserin  |4 aut 
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773 1 8 |g volume:20  |g year:2014  |g number:6  |g day:07  |g month:06  |g pages:1913-28 
856 4 0 |u http://dx.doi.org/10.1111/gcb.12518  |3 Volltext 
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