Environmental Science and Pollution Research

, Volume 25, Issue 15, pp 14511–14520 | Cite as

The regulatory role of endogenous iron on greenhouse gas emissions under intensive nitrogen fertilization in subtropical soils of China

  • Jiangpei Han
  • Liangsheng ShiEmail author
  • Yakun Wang
  • Zhuowei Chen
  • Laosheng Wu
Research Article


Anaerobic batch experiments were conducted to study the regulatory role of endogenous iron in greenhouse gas emissions under intensive nitrogen fertilization in subtropical soils of China. Fe2+, Fe3+, and NO3-N dynamics and N2O, CH4, and CO2 emissions, as well as the relationships between N fertilizer, endogenous iron, and greenhouse gas emissions were investigated. The emissions of N2O increased to different extents from all the test soils by N1 (260 mg N kg−1) application compared with N0. After 24 days of anaerobic incubation, the cumulative emissions of N2O from red soils in De’an (DR) were significantly higher than that from paddy soils in De’an (DP) and Qujialing (QP) under N1. However, N application enhanced CH4 and CO2 emissions from the red soils slightly but inhibited the emissions from paddy soils. The maximal CH4 and CO2 emission fluxes occurred in DP soil without N input. Pearson’s correlation analysis showed that there were significant correlations (P < 0.01) between Fe2+ and Fe3+, NO3-N, (N2O + N2)-N concentrations in DP soil, implying that Fe2+ oxidation was coupled with nitrate reduction accompanied by (N2O + N2)-N emissions and the endogenous iron played a regulatory role in greenhouse gas emissions mainly through the involvement in denitrification. The proportion of the electrons donated by Fe2+ used for N2O production in denitrification in DP soil was approximately 37.53%. Moreover, positive correlations between Fe2+ and CH4, CO2 were found in both DR and QP soils, suggesting that endogenous iron might regulate the anaerobic decomposition of organic carbon to CH4 and CO2 in the two soils. Soil pH was also an important factor controlling greenhouse gas emissions by affecting endogenous iron availability and C and N transformation processes.


Nitrogen fertilization Endogenous iron Greenhouse gas emissions Subtropical soils 


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Copyright information

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

Authors and Affiliations

  • Jiangpei Han
    • 1
  • Liangsheng Shi
    • 1
    Email author
  • Yakun Wang
    • 1
  • Zhuowei Chen
    • 1
  • Laosheng Wu
    • 2
  1. 1.State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhanChina
  2. 2.Department of Environmental SciencesUniversity of CaliforniaRiversideUSA

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