Journal article

Application of the Denitrification-Decomposition Model to Predict Carbon Dioxide Emissions under Alternative Straw Retention Methods

Can Chen, Deli Chen, Jianjun Pan, Shu Kee Lam

The Scientific World Journal | HINDAWI LTD | Published : 2013


Straw retention has been shown to reduce carbon dioxide (CO2) emission from agricultural soils. But it remains a big challenge for models to effectively predict CO2 emission fluxes under different straw retention methods. We used maize season data in the Griffith region, Australia, to test whether the denitrification-decomposition (DNDC) model could simulate annual CO2 emission. We also identified driving factors of CO2 emission by correlation analysis and path analysis. We show that the DNDC model was able to simulate CO2 emission under alternative straw retention scenarios. The correlation coefficients between simulated and observed daily values for treatments of straw burn and straw incor..

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Funding Acknowledgements

The authors thank Dr. Christopher Ogden (formerly of Weill Cornell Medical College in Qatar) for his check of English and comments on this paper. They also wish to express their thanks to anonymous reviewers for providing useful comments to improve the paper. This study was supported by the Australian Government Department of Agriculture, Forestry and Fisheries, and the Australian Research Council.