Paddy and Water Environment

, Volume 16, Issue 3, pp 391–396 | Cite as

Macropores regulate CO2 behavior in an andisol soil

  • Linlin Guo
  • Taku Nishimura
  • Hiromi Imoto
  • Zhigang Sun
Short Communication


Macropores resulting from soil pedogenesis, biological activity, and agricultural practices play important roles in soil water, chemical and gas transport; however, seldom studies focus on the effect of soil macropores on CO2 behavior. In this study, a 150-day soil column incubation experiment was conducted to investigate the CO2 behavior in a homogeneous soil column and a soil column with an artificial macropore, which have the same total porosity. The results showed that the cumulative CO2 fluxes observed in the soil with a macropore (57.2 g m−2) were higher than those in the homogeneous soil (52.7 g m−2). The soil cumulative CO2 fluxes measured using column incubation can fit the kinetic model, and a higher carbon mineralization rate in the soil with the macropore was found. The results of the incubation experiment also suggest that macropore increased the gas diffusivities, and thus decreased the CO2 concentrations in the soil profile. This study proposed a simulation experiment and quantified the effect of macropore on soil CO2 behavior, which could help to understand the mechanism of CO2 emission from soil with macropores especially caused by agricultural practices.


Gas diffusion Macropore Soil CO2 flux Column incubation 



This research was supported by the 100 Talents Program of the Chinese Academy of Sciences and by Institute for Sustainable Agro-ecosystem Services (ISAS), The University of Tokyo, for soil sampling.


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Copyright information

© The International Society of Paddy and Water Environment Engineering and Springer Japan KK, part of Springer Nature 2018

Authors and Affiliations

  • Linlin Guo
    • 1
    • 2
  • Taku Nishimura
    • 2
  • Hiromi Imoto
    • 2
  • Zhigang Sun
    • 1
  1. 1.Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina
  2. 2.Graduate School of Agricultural and Life SciencesThe University of TokyoBunkyoJapan

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