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Rotary Tillage Plus Mechanical Transplanting Practices Increased Rice Yields with Lower CH 4 Emission in a Single Cropping Rice System

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Listed:
  • Linlin Shi

    (Institute of Agricultural Sciences in Taihu Lake Region of Jiangsu, Suzhou 215155, China
    National Agricultural Experiment Station for Soil Quality, Suzhou 215155, China)

  • Linlin Dong

    (Institute of Agricultural Sciences in Taihu Lake Region of Jiangsu, Suzhou 215155, China)

  • Jun Zhang

    (Key Laboratory of Crop Physiology & Ecology, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China)

  • Jing Huang

    (State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China)

  • Yuan Shen

    (Institute of Agricultural Sciences in Taihu Lake Region of Jiangsu, Suzhou 215155, China)

  • Yueyue Tao

    (Institute of Agricultural Sciences in Taihu Lake Region of Jiangsu, Suzhou 215155, China)

  • Haihou Wang

    (Institute of Agricultural Sciences in Taihu Lake Region of Jiangsu, Suzhou 215155, China)

  • Changying Lu

    (National Agricultural Experiment Station for Soil Quality, Suzhou 215155, China)

Abstract

As the main contributor to greenhouse gas (GHG) in paddy soil, information on methane (CH 4 ) emission characteristics under different tillage and cultivation practices are limited. A five-year field trial was conducted from 2019 in a single-cropping rice system in Taihu Lake region, east of China. The experiment had a completely randomized block design, and the treatments included rotary tillage plus rice dry direct seeding (RD), rotary tillage plus rice mechanical transplanting (RT), and plowing tillage plus rice mechanical transplanting (PT). We determined the rice yield, GHG emission, soil traits, and methanogens and methanotrophs in 2022 and 2023. The results revealed that PT and RT significantly increased rice yield compared to RD, whereas PT simultaneously increased CH 4 emissions. The year-averaged cumulative CH 4 emissions in PT were increased by 38.5% and 61.4% higher than RT and RD, respectively. Meanwhile, yield-scaled global warming potentials (GWPs) in RT and RD were lower than those in PT. Tillage and cultivation practices shifted mcrA and pmoA abundances, and PT significantly decreased pmoA abundance. The community structure and diversity of the methanogens and methanotrophs were not significantly affected. Structural equation model analyses illustrated that CH 4 emissions were regulated by mcrA and pmoA directly, which in turn, regulated by soil carbon and nitrogen. Overall, rotary tillage plus mechanism transplanting was a feasible agronomic technology in a single-cropping rice system in Taihu Lake region, exhibiting higher and more stable rice productivity, accompanied with lower CH 4 emissions and yield-scaled GWP.

Suggested Citation

  • Linlin Shi & Linlin Dong & Jun Zhang & Jing Huang & Yuan Shen & Yueyue Tao & Haihou Wang & Changying Lu, 2024. "Rotary Tillage Plus Mechanical Transplanting Practices Increased Rice Yields with Lower CH 4 Emission in a Single Cropping Rice System," Agriculture, MDPI, vol. 14(7), pages 1-17, July.
  • Handle: RePEc:gam:jagris:v:14:y:2024:i:7:p:1065-:d:1427180
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    References listed on IDEAS

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    2. Florian Roth & Elias Broman & Xiaole Sun & Stefano Bonaglia & Francisco Nascimento & John Prytherch & Volker Brüchert & Maysoon Lundevall Zara & Märta Brunberg & Marc C. Geibel & Christoph Humborg & A, 2023. "Methane emissions offset atmospheric carbon dioxide uptake in coastal macroalgae, mixed vegetation and sediment ecosystems," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
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