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Respiration of nitrous oxide in suboxic soil
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
ID 64204
Author(s) Vieten, B.; Conen, F.; Neftel, A.; Alewell, C.
Author(s) at UniBasel Conen, Franz
Alewell, Christine
Year 2009
Title Respiration of nitrous oxide in suboxic soil
Journal European journal of soil science
Volume 60
Number 3
Pages / Article-Number 332-337
Abstract Reduction of nitrous oxide (N2O) is an autonomous respiratory pathway. Nitrous oxide is an alternative electron acceptor to O-2 when intensive biological activity and reduced diffusivity result in an O-2 deficit. Hypoxic or anoxic micro sites may form even in well-aerated soils, and provide a sink for N2O diffusing through the gas-filled pore space. We reproduced similar in vitro conditions in suboxic (0.15% O-2) flow-through incubation experiments with samples from a Stagnosol and from a Histosol. Apparent half-saturation constants (k(m)) for N2O reduction were similar for both soils and were, on average, 3.8 mu mol mol(-1) at 5 degrees C, 5.1 mu mol mol(-1) at 10 degrees C, and 6.9 mu mol mol(-1) at 20 degrees C. Respiration of N2O was estimated to contribute a maximum proportion of 1.7% to total respiration in the Stagnosol (pH 7.0) and 0.9% in the Histosol (pH 2.9).
Publisher Blackwell Science
ISSN/ISBN 1351-0754
Full Text on edoc No
Digital Object Identifier DOI 10.1111/j.1365-2389.2009.01125.x
ISI-Number WOS:000266072100003
Document type (ISI) Article

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