Water, Air, & Soil Pollution

, Volume 223, Issue 8, pp 5155–5174 | Cite as

How Effective is Reduced Tillage–Cover Crop Management in Reducing N2O Fluxes from Arable Crop Soils?

  • M. AbdallaEmail author
  • K. Rueangritsarakul
  • M. Jones
  • B. Osborne
  • M. Helmy
  • B. Roth
  • J. Burke
  • P. Nolan
  • P. Smith
  • M. Williams


Field management is expected to influence nitrous oxide (N2O) production from arable cropping systems through effects on soil physics and biology. Measurements of N2O flux were carried out on a weekly basis from April 2008 to August 2009 for a spring sown barley crop at Oak Park Research Centre, Carlow, Ireland. The soil was a free draining sandy loam typical of the majority of cereal growing land in Ireland. The aims of this study were to investigate the suitability of combining reduced tillage and a mustard cover crop (RT–CC) to mitigate nitrous oxide emissions from arable soils and to validate the DeNitrification–DeComposition (DNDC) model version (v. 9.2) for estimating N2O emissions. In addition, the model was used to simulate N2O emissions for two sets of future climate scenarios (period 2021–2060). Field results showed that although the daily emissions were significantly higher for RT–CC on two occasions (p < 0.05), no significant effect (p > 0.05) on the cumulative N2O flux, compared with the CT treatment, was found. DNDC was validated using N2O data collected from this study in combination with previously collected data and shown to be suitable for estimating N2O emissions (r 2 = 0.70), water-filled pore space (WFPS) (r 2 = 0.58) and soil temperature (r 2 = 0.87) from this field. The relative deviations of the simulated to the measured N2O values with the 140 kg N ha−1 fertiliser application rate were −36 % for RT–CC and −19 % for CT. Root mean square error values were 0.014 and 0.007 kg N2O–N ha−1 day−1, respectively, indicating a reasonable fit. Future cumulative N2O fluxes and total denitrification were predicted to increase under the RT–CC management for all future climate projections, whilst predictions were inconsistent under the CT. Our study suggests that the use of RT–CC as an alternative farm management system for spring barley, if the sole objective is to reduce N2O emissions, may not be successful.


Cover crop Reduced tillage Nitrous oxide Arable soils DNDC model Future climate 



This work was funded by a Teagasc Walsh Fellowship and Nitro-Europe IP (EUFP 6). PS is a Royal Society–Wolfson Research Merit Award holder. Our thanks go to the field staff of the Oak Park Research Centre in maintaining and managing the site, and to technical staff of the Botany Department, Trinity College Dublin in providing help in soil analysis.


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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • M. Abdalla
    • 1
    • 5
    Email author
  • K. Rueangritsarakul
    • 1
  • M. Jones
    • 1
  • B. Osborne
    • 2
  • M. Helmy
    • 2
  • B. Roth
    • 1
  • J. Burke
    • 3
  • P. Nolan
    • 4
  • P. Smith
    • 5
  • M. Williams
    • 1
  1. 1.Department of Botany, School of Natural SciencesTrinity College DublinDublin 2Ireland
  2. 2.School of Biology and Environmental ScienceUniversity College DublinDublin 4Ireland
  3. 3.Teagasc Oak Park Research CenterCarlowIreland
  4. 4.Meteorology and Climate CentreUniversity College DublinDublin 4Ireland
  5. 5.Institute of Biological and Environmental Sciences, School of Biological SciencesUniversity of AberdeenAberdeenUK

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