IDEAS home Printed from https://ideas.repec.org/a/gam/jagris/v14y2024i6p839-d1403255.html
   My bibliography  Save this article

Green Manuring with Oilseed Rape ( Brassica napus L.) Mitigates Methane (CH 4 ) and Nitrous Oxide (N 2 O) Emissions in a Rice-Ratooning System in Central China

Author

Listed:
  • Lai Yao

    (Hubei Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China)

  • Jie Zhu

    (Xiangyang Academy of Agricultural Sciences, Xiangyang 441057, China)

  • Wei Yang

    (Hubei Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China)

  • Dongzhu Zhao

    (Horticulture Workstation of Yongping County, Dali 672600, China)

  • Yong Zhou

    (College of Life Science and Technology, Hubei Engineering University, Xiaogan 432000, China)

  • Shaoqiu Li

    (Hubei Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China)

  • Jiangwen Nie

    (Hubei Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China)

  • Lixia Yi

    (Hubei Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China)

  • Zhangyong Liu

    (Hubei Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China)

  • Bo Zhu

    (Hubei Collaborative Innovation Centre for Grain Industry, College of Agriculture, Yangtze University, Jingzhou 434025, China)

Abstract

The use of oilseed rape (OS, Brassica napus L.) as a winter green manure is crucial for enhancing soil fertility and reducing chemical N application in paddy fields. However, the impacts of replacing varying amounts of chemical N with OS on CH 4 and N 2 O emissions in paddy soils have not been well evaluated. In this study, GHG emissions, soil properties and OS decomposition in a rice-ratooning system with different OS-urea N replacement rates (0%, 25%, 50%, 75% and 100%) were investigated. Our results indicate that 84.7–90.7% of the initial C and 97.5–98.4% of the N were released during the 192-day decomposition process, and that the mineralization patterns of net C and net N in the OS residue were consistent with a single exponential decay model. The lowest CH 4 emissions (9.97 g m −2 ) were observed at 0% OS, while the highest N 2 O emissions (0.40 g m −2 ) were observed at this level of substitution. Conversely, the highest CH 4 emissions (20.71 g m −2 ) and lowest N 2 O emissions (0.07 g m −2 ) were observed at 100% OS. Compared to 0% substitution, 25% substitution significantly decreased GWP and GHGI without reducing rice grain yield. Environmental parameters such as soil redox, NH 4 + -N and residual N and C were shown to be significantly associated with CH 4 emissions, whereas soil redox, NH 4 + -N and residual C were the main drivers of N 2 O emissions. In conclusion, 25% substitution of OS was the most cost-effective measure for balancing greenhouse gas emission and rice yield.

Suggested Citation

  • Lai Yao & Jie Zhu & Wei Yang & Dongzhu Zhao & Yong Zhou & Shaoqiu Li & Jiangwen Nie & Lixia Yi & Zhangyong Liu & Bo Zhu, 2024. "Green Manuring with Oilseed Rape ( Brassica napus L.) Mitigates Methane (CH 4 ) and Nitrous Oxide (N 2 O) Emissions in a Rice-Ratooning System in Central China," Agriculture, MDPI, vol. 14(6), pages 1-15, May.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:6:p:839-:d:1403255
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2077-0472/14/6/839/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2077-0472/14/6/839/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Kandasamy Senthilraja & Subramanian Venkatesan & Dhandayuthapani Udhaya Nandhini & Manickam Dhasarathan & Balasubramaniam Prabha & Kovilpillai Boomiraj & Shanmugam Mohan Kumar & Kulanthaivel Bhuvanesw, 2023. "Mitigating Methane Emission from the Rice Ecosystem through Organic Amendments," Agriculture, MDPI, vol. 13(5), pages 1-17, May.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.

      Corrections

      All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jagris:v:14:y:2024:i:6:p:839-:d:1403255. See general information about how to correct material in RePEc.

      If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

      If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

      If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

      For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

      Please note that corrections may take a couple of weeks to filter through the various RePEc services.

      IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.