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Effect of Paddy-Upland Rotation System on the Net Greenhouse Gas Balance as the Sum of Methane and Nitrous Oxide Emissions and Soil Carbon Storage: A Case in Western Japan

Author

Listed:
  • Hiroyuki Hasukawa

    (Agricultural Technology Promotion Center of Shiga Prefecture, Omihachiman 521-1301, Japan)

  • Yumi Inoda

    (Agricultural Technology Promotion Center of Shiga Prefecture, Omihachiman 521-1301, Japan)

  • Satoshi Toritsuka

    (Agricultural Technology Promotion Center of Shiga Prefecture, Omihachiman 521-1301, Japan)

  • Shigeto Sudo

    (NARO Institute for Agro-Environmental Science, Tsukuba 305-8604, Japan)

  • Noriko Oura

    (NARO Institute for Agro-Environmental Science, Tsukuba 305-8604, Japan)

  • Tomohito Sano

    (NARO Institute for Agro-Environmental Science, Tsukuba 305-8604, Japan
    NARO Headquarters, Tsukuba 305-8517, Japan)

  • Yasuhito Shirato

    (NARO Institute for Agro-Environmental Science, Tsukuba 305-8604, Japan)

  • Junta Yanai

    (Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto 606-8522, Japan)

Abstract

To investigate the effect of paddy-upland (PU) rotation system on greenhouse gas emissions, methane (CH 4 ) and nitrous oxide (N 2 O) emissions were monitored for three years for a PU rotation field (four cultivations (wheat-soybean-rice-rice) over three years) and continuous paddy (CP) field on alluvial soil in western Japan. Soil carbon storage was also calculated using an improved Rothamsted Carbon (RothC) model. The net greenhouse gas balance was finally evaluated as the sum of CO 2 eq of the CH 4 , N 2 O and changes in soil carbon storage. The average CH 4 emissions were significantly lower and the average N 2 O emissions were significantly higher in the PU field than those in the CP field ( p < 0.01). On CO 2 equivalent basis, CH 4 emissions were much higher than N 2 O emission. In total, the average CO 2 eq emissions of CH 4 plus N 2 O in the PU field (1.81 Mg CO 2 ha −1 year −1 ) were significantly lower than those in the CP field (7.42 Mg CO 2 ha −1 year −1 ) ( p < 0.01). The RothC model revealed that the changes in soil carbon storage corresponded to CO 2 eq emissions of 0.57 and 0.09 Mg CO 2 ha −1 year −1 in the both fields, respectively. Consequently, the net greenhouse gas balance in the PU and CP fields were estimated to be 2.38 and 7.51 Mg CO 2 ha −1 year −1 , respectively, suggesting a 68% reduction in the PU system. In conclusion, PU rotation system can be regarded as one type of the climate-smart soil management.

Suggested Citation

  • Hiroyuki Hasukawa & Yumi Inoda & Satoshi Toritsuka & Shigeto Sudo & Noriko Oura & Tomohito Sano & Yasuhito Shirato & Junta Yanai, 2021. "Effect of Paddy-Upland Rotation System on the Net Greenhouse Gas Balance as the Sum of Methane and Nitrous Oxide Emissions and Soil Carbon Storage: A Case in Western Japan," Agriculture, MDPI, vol. 11(1), pages 1-16, January.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:1:p:52-:d:477899
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    References listed on IDEAS

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    1. Fumiaki Takakai & Shinpei Nakagawa & Kensuke Sato & Kazuhiro Kon & Takashi Sato & Yoshihiro Kaneta, 2017. "Net Greenhouse Gas Budget and Soil Carbon Storage in a Field with Paddy–Upland Rotation with Different History of Manure Application," Agriculture, MDPI, vol. 7(6), pages 1-13, June.
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    Cited by:

    1. Kiyotaka Masuda, 2023. "Combined Application of a Multi-Objective Genetic Algorithm and Life Cycle Assessment for Evaluating Environmentally Friendly Farming Practices in Japanese Rice Farms," Sustainability, MDPI, vol. 15(13), pages 1-22, June.

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