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Nitrous oxide emissions from irrigated cotton soils of northern Australia

By Peter Grace, David Rowlings, Ian Rochester, Ralf Kiese and Klaus Butterbach-Bahl

Abstract

An automated gas sampling methodology has been used to estimate nitrous oxide (N2O) emissions from\ud heavy black clay soil in northern Australia where split applications of urea were applied to furrow irrigated\ud cotton. Nitrous oxide emissions from the beds were 643 g N/ha over the 188 day measurement period (after\ud planting), whilst the N2O emissions from the furrows were significantly higher at 967 g N/ha. The DNDC\ud model was used to develop a full season simulation of N2O and N2 emissions. Seasonal N2O emissions were\ud equivalent to 0.83% of applied N, with total gaseous N losses (excluding NH3) estimated to be 16% of the\ud applied N

Topics: Nitrous oxide, cotton, DNDC, nitrogen
Publisher: International Union of Soil Sciences
Year: 2010
OAI identifier: oai:eprints.qut.edu.au:37658

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