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Organic carbon content and its liable components in paddy soil under water-saving irrigation

Author

Listed:
  • Yan MA

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China
    College of Water Conservancy and Hydropower Engineering, Hohai University,)

  • Junzeng XU

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China
    College of Water Conservancy and Hydropower Engineering, Hohai University,)

  • Qi WEI

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China)

  • Shihong YANG

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China)

  • Linxian LIAO

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China
    College of Water Conservancy and Hydropower Engineering, Hohai University,)

  • Suyan CHEN

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China
    College of Water Conservancy and Hydropower Engineering, Hohai University,)

  • Qi LIAO

    (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China
    College of Water Conservancy and Hydropower Engineering, Hohai University,)

Abstract

Variation of soil organic carbon (SOC) and its liable fractions under non-flooding irrigation (NFI) were investigated. In NFI paddies, the soil microbial biomass carbon (SMBC) and water extractable organic carbon (SWEC) content in 0-40 cm soil increased by 1.73-21.74% and 1.44-30.63%, and SOC in NFI fields decreased by 0.90-18.14% than in flooding irrigation (FI) fields. As a result, the proportion of SMBC or SWEC to SOC increased remarkably. It is attributed to the different water and aeration conditions between FI and NFI irrigation. The non-flooding water-saving irrigation increased soil microbial activity and mineralization of SOC, which broke down more soil organic nutrients into soluble proportion and is beneficial for soil fertility, but might lead to more CO2 emission and degradation in carbon sequestration than FI paddies.

Suggested Citation

  • Yan MA & Junzeng XU & Qi WEI & Shihong YANG & Linxian LIAO & Suyan CHEN & Qi LIAO, 2017. "Organic carbon content and its liable components in paddy soil under water-saving irrigation," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 63(3), pages 125-130.
    • Handle: RePEc:caa:jnlpse:v:63:y:2017:i:3:id:817-2016-pse
    DOI: 10.17221/817/2016-PSE
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    References listed on IDEAS

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    1. Rachel Cernansky, 2015. "Agriculture: State-of-the-art soil," Nature, Nature, vol. 517(7534), pages 258-260, January.
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    Cited by:

    1. Dinh Thi Lan Phuong & Nguyen Thanh Hoa & Nguyen Thi Hang Nga, 2020. "Impact of irrigation techniques on rice yield and dynamics of zinc in plants and soil," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 66(3), pages 135-142.

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