Flooding-induced N₂O emission bursts controlled by pH and nitrate in agricultural soils
dc.contributor.author | Hansen, M | |
dc.contributor.author | Clough, Timothy | |
dc.contributor.author | Elberling, B | |
dc.date.accessioned | 2017-02-27T03:21:53Z | |
dc.date.available | 2013-11-01 | |
dc.date.issued | 2014-02 | |
dc.date.submitted | 2013-10-21 | |
dc.description.abstract | Agricultural soils are a major source of the greenhouse gas nitrous oxide (N₂O) to the atmosphere. Increasing frequency and severity of flooding as predicted for large intensively cropped areas may promote temporary denitrification and N₂O production but the effect of flooding events on N₂O emissions is poorly studied for agricultural systems. The overall N₂O dynamics during flooding of an agricultural soil and the effect of pH and NO₃⁻ concentration has been investigated based on a combination of the use of microsensors, stable isotope techniques, KCl extractions and modelling. This study shows that non-steady state peak N₂O emission events during flooding might potentially be at least in the order of reported annual mean N₂O emissions, which typically do not include flood induced N₂O emissions, and that more than one-third of the produced N₂O in the soil is not emitted but consumed within the soil. The magnitude of the emissions are, not surprisingly, positively correlated with the soil NO₃⁻ concentration but also negatively correlated with liming (neutral pH). The redox potential of the soil is found to influence N₂O accumulation as the production and consumption of N₂O occurs in narrow redox windows where the redox range levels are negatively correlated with the pH. This study highlights the potential importance of N₂O bursts associated with flooding and infers that annual N₂O emission estimates for tilled agricultural soils that are temporarily flooded will be underestimated. Furthermore, this study shows that subsurface N₂O reduction is a key process limiting N₂O emission and that a reduction in N₂O emissions is achievable if highly fertilized N-rich soils are limed. | |
dc.format.extent | pp.17-24 | |
dc.format.medium | Undetermined | |
dc.identifier | https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=elements_prod&SrcAuth=WosAPI&KeyUT=WOS:000332261600003&DestLinkType=FullRecord&DestApp=WOS_CPL | |
dc.identifier.citation | Hansen, M., Clough, T.J., & Elberling, B. (2014). Flooding-induced N₂O emission bursts controlled by pH and nitrate in agricultural soils. Soil Biology & Biochemistry, 69, 17-24. doi:10.1016/j.soilbio.2013.10.031 | |
dc.identifier.doi | 10.1016/j.soilbio.2013.10.031 | |
dc.identifier.eissn | 1879-3428 | |
dc.identifier.issn | 0038-0717 | |
dc.identifier.other | AC1MV (isidoc) | |
dc.identifier.uri | https://hdl.handle.net/10182/7810 | |
dc.language | en | |
dc.language.iso | en | |
dc.publisher | Elseiver | |
dc.relation | The original publication is available from Elseiver - https://doi.org/10.1016/j.soilbio.2013.10.031 - http://www.sciencedirect.com/science/article/pii/S0038071713003751# | |
dc.relation.isPartOf | Soil Biology and Biochemistry | |
dc.relation.uri | https://doi.org/10.1016/j.soilbio.2013.10.031 | |
dc.rights | © 2013 Elsevier Ltd. All rights reserved. | |
dc.subject | N₂O | |
dc.subject | flooding | |
dc.subject | denitrification | |
dc.subject | dissimilatory NO₃⁻ reduction to ammonium (DNRA) | |
dc.subject | agriculture | |
dc.subject | microsensor | |
dc.subject | stable isotope | |
dc.subject.anzsrc | ANZSRC::0503 Soil Sciences | |
dc.subject.anzsrc | ANZSRC::050304 Soil Chemistry (excl. Carbon Sequestration Science) | |
dc.subject.anzsrc | ANZSRC::079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.) | |
dc.subject.anzsrc | ANZSRC::079902 Fertilisers and Agrochemicals (incl. Application) | |
dc.subject.anzsrc2020 | ANZSRC::4106 Soil sciences | |
dc.title | Flooding-induced N₂O emission bursts controlled by pH and nitrate in agricultural soils | |
dc.type | Journal Article | |
lu.contributor.unit | LU | |
lu.contributor.unit | LU|Agriculture and Life Sciences | |
lu.contributor.unit | LU|Agriculture and Life Sciences|SOILS | |
lu.contributor.unit | LU|Research Management Office | |
lu.contributor.unit | LU|Research Management Office|OLD QE18 | |
lu.identifier.orcid | 0000-0002-5978-5274 | |
pubs.publication-status | Published | |
pubs.publisher-url | http://www.sciencedirect.com/science/article/pii/S0038071713003751# | |
pubs.volume | 69 |