Article: Methane and nitrous oxide emissions and their GWPs: research on different irrigation modes in a rice paddy field Journal: International Journal of Environmental Engineering (IJEE) 2016 Vol.8 No.4 pp.267 - 279 Abstract: CH4 and N2O emission fluxes from a rice paddy field were measured in the cold region of Heilongjiang under four irrigation modes (control irrigation, wet irrigation, intermittent irrigation, and flood irrigation) by the static chamber-gas chromatograph technique. The emission rates of CH4 and N2O were simultaneously monitored once a week. The net global warming potential (GWP) was calculated as CO2 equivalents. The CH4 and N2O emission peak appeared in the rice active growth period, while the emissions were reduced in the remaining period regardless of the irrigation method utilised. The CH4 emission under flood irrigation was the highest, whereas that of the wet irrigation was 27.2% lower; the control and the intermittent irrigation manifested a decrease by 34% and 48.2%, respectively. N2O emission under flood irrigation was 0.41 kg•hm−2 smaller than that in the intermittent irrigation, but it was higher than those in the control and wet irrigation, respectively. By applying water-saving irrigation techniques, the greenhouse gas emissions from paddy fields can be effectively decreased. Inderscience Publishers - linking academia, business and industry through research

Title: Methane and nitrous oxide emissions and their GWPs: research on different irrigation modes in a rice paddy field

Authors: Mengxue Wang; Zhongxue Zhang; Yanyu Lin; Chunbo Lv; Dan Xu

Addresses: Heilongjiang Bayi Agricultural University, Daqing High-tech Development Zone, Heilongjiang, China; College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin 150030, China ' College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin 150030, China ' College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin 150030, China ' Water Conservancy Management Center of Heilongjiang, Harbin 150001, China ' College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin 150030, China

Abstract: CH₄ and N₂O emission fluxes from a rice paddy field were measured in the cold region of Heilongjiang under four irrigation modes (control irrigation, wet irrigation, intermittent irrigation, and flood irrigation) by the static chamber-gas chromatograph technique. The emission rates of CH₄ and N₂O were simultaneously monitored once a week. The net global warming potential (GWP) was calculated as CO₂ equivalents. The CH₄ and N₂O emission peak appeared in the rice active growth period, while the emissions were reduced in the remaining period regardless of the irrigation method utilised. The CH₄ emission under flood irrigation was the highest, whereas that of the wet irrigation was 27.2% lower; the control and the intermittent irrigation manifested a decrease by 34% and 48.2%, respectively. N₂O emission under flood irrigation was 0.41 kg•hm⁻² smaller than that in the intermittent irrigation, but it was higher than those in the control and wet irrigation, respectively. By applying water-saving irrigation techniques, the greenhouse gas emissions from paddy fields can be effectively decreased.

Keywords: irrigation mode; CH₄ emission; N₂O emission; emission flux; global warming potentials; GWPs.

DOI: 10.1504/IJEE.2016.085502

International Journal of Environmental Engineering, 2016 Vol.8 No.4, pp.267 - 279

Received: 23 Mar 2016
Accepted: 30 Jan 2017
Published online: 28 Jul 2017 *

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Title: Methane and nitrous oxide emissions and their GWPs: research on different irrigation modes in a rice paddy field

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