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BG | Articles | Volume 16, issue 2
Biogeosciences, 16, 383–408, 2019
https://doi.org/10.5194/bg-16-383-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 16, 383–408, 2019
https://doi.org/10.5194/bg-16-383-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 24 Jan 2019

Research article | 24 Jan 2019

Early season N2O emissions under variable water management in rice systems: source-partitioning emissions using isotope ratios along a depth profile

Elizabeth Verhoeven et al.

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Cited articles

Agenzia Regionale per la Protezione dell'Ambiente-Lomardia: Regional Agency for the Protection of the Environment, Lombardy, Pavia, Castello D'Agogna, available at: http://www.arpalombardia.it/siti/arpalombardia/meteo/richiesta-dati-misurati/Pagine/RichiestaDatiMisurati.aspx, last access: 15 January 2019. 
Arth, I. and Frenzel, P.: Nitrification and denitrification in the rhizosphere of rice: the detection of processes by a new multi-channel electrode, Biol. Fert. Soils, 31, 427–435, https://doi.org/10.1007/s003749900190, 2000. 
Aulakh, M. S., Khera, T. S., Doran, J. W., and Bronson, K. F.: Denitrification, N2O and CO2 fluxes in rice-wheat cropping system as affected by crop residues, fertilizer N and legume green manure, Biol. Fert. Soils, 34, 375–389, https://doi.org/10.1007/s003740100420, 2001. 
Baggs, E. M.: A review of stable isotope techniques for N2O source partitioning in soils: recent progress, remaining challenges and future considerations, Rapid Commun. Mass Sp., 22, 1664–1672, https://doi.org/10.1002/rcm.3456, 2008. 
Bremner, J., Blackmer, A., and Waring, S.: Formation of nitrous oxide and dinitrogen by chemical decomposition of hydroxylamine in soils, Soil Biol. Biochem., 12, 263–269, 1980. 
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This study utilized state-of-the-art measurements of nitrogen isotopes to evaluate nitrogen cycling and to assess the biological sources of the potent greenhouse gas, N2O, in response to water-saving practices in rice systems. Water-saving practices did emit more N2O, and high N2O production had a lower 15N isotope signature. Modeling and visual interpretation indicate that these emissions mostly came from denitrification or nitrifier denitrification, controlled upstream by nitrification rates.
This study utilized state-of-the-art measurements of nitrogen isotopes to evaluate nitrogen...
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