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Environmental Science and Pollution Research

, Volume 25, Issue 13, pp 13014–13025 | Cite as

Decrease in the annual emissions of CH4 and N2O following the initial land management change from rice to vegetable production

  • Lei Wu
  • Xian Wu
  • Muhammad Shaaban
  • Minghua Zhou
  • Jinsong Zhao
  • Ronggui HuEmail author
Research Article

Abstract

In recent years, rice paddies have been increasingly converted to vegetable production resulting from economic benefits and changes in demand of diets, potentially altering soil greenhouse gas (GHG) balance. Here, we implemented a parallel field experiment to simultaneously quantify the differences in emissions of CH4 and N2O among rice paddy (RP) and conventional vegetable field (CV) and greenhouse vegetable field (GV), both of which have been recently converted from rice paddy in subtropical China over a full year. The results revealed that CH4 emission was reduced dramatically by nearly 100% following the initial land management change from rice to vegetable production, with annual emissions of 720.9, 0.9, and 0.2 kg CH4-C ha−1 for RP, CV, and GV, respectively. This conversion however substantially increased N2O emissions, resulting in the transition from a minor sink of N2O in RP (−0.1 kg N ha−1 yr−1) to considerable N2O sources in CV (31.8 kg N ha−1 yr−1) and GV (52.2 kg N ha−1 yr−1). Furthermore, annual N2O emission from GV significantly exceeded that from CV due to lower soil pH and higher soil temperature facilitating N2O production in GV relative to CV. Land management change significantly decreased the annual total emissions of CH4 and N2O from CV and GV by 19–51% as compared to RP, attributing to the reduced CH4 emissions outweighing the increased N2O emissions in CV and GV. These results indicate that expansion of vegetable production at the expense of rice paddies for higher economic benefits also helps mitigate the total emissions of CH4 and N2O.

Keywords

Land management change CH4 N2Rice paddy Vegetable field 

Notes

Acknowledgements

The authors would like to thank the National Program on Key Basic Research Project of China (2012CB417106) and the Fundamental Research Fund for the Central Universities (2662016PY098) for financially supporting this research. Minghua Zhou received support via the CAS Pioneer Hundred Talents Program. The authors also would like to acknowledge the coworkers and students of the Changsha Research Station for Agricultural & Environmental Monitoring who helped with field sampling and laboratory analyses.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Lei Wu
    • 1
  • Xian Wu
    • 1
  • Muhammad Shaaban
    • 1
  • Minghua Zhou
    • 2
  • Jinsong Zhao
    • 1
  • Ronggui Hu
    • 1
    Email author
  1. 1.College of Resources and EnvironmentHuazhong Agricultural UniversityWuhanChina
  2. 2.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduChina

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