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Fertilization and Global Warming Impact on Paddy CH 4 Emissions

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Listed:
  • Pengfu Hou

    (Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)

  • Xuzhe Deng

    (Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)

  • Jing Wang

    (Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China)

  • Lixiang Xue

    (Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)

  • Yushu Zhang

    (Fujian Key Laboratory of Plant Nutrition and Fertilizer, Institute of Soil and Fertilizer, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China)

  • Tingting Xu

    (Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
    College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Lihong Xue

    (Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
    College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China)

  • Linzhang Yang

    (Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs of China, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
    College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China)

Abstract

Introduction: This study aimed to assess the influence of experimental warming and fertilization on rice yield and paddy methane emissions. Methods: A free-air temperature increase system was used for the experimental warming treatment (ET), while the control treatment used ambient temperature (AC). Each treatment contained two fertilization strategies, (i) normal fertilization with N, P and K fertilizers (CN) and (ii) without N fertilizer input (CK). Results: The yield was remarkably dictated by fertilization ( p < 0.01), but not warming. Its value with CN treatment increased by 76.24% compared to CK. Also, the interactive effect of warming and fertilization on CH 4 emissions was insignificant. The seasonal emissions from warming increased by 36.93% compared to AC, while the values under CN treatment increased by 79.92% compared to CK. Accordingly, the ET-CN treatment obtained the highest CH 4 emissions (178.08 kg ha −1 ), notably higher than the other treatments. Also, the results showed that soil fertility is the main driver affecting CH 4 emissions rather than soil microorganisms. Conclusions: Fertilization aggravates the increasing effect of warming on paddy methane emissions. It is a daunting task to optimize fertilization to ensure yield and reduce methane emissions amid global warming.

Suggested Citation

  • Pengfu Hou & Xuzhe Deng & Jing Wang & Lixiang Xue & Yushu Zhang & Tingting Xu & Lihong Xue & Linzhang Yang, 2023. "Fertilization and Global Warming Impact on Paddy CH 4 Emissions," IJERPH, MDPI, vol. 20(6), pages 1-10, March.
    • Handle: RePEc:gam:jijerp:v:20:y:2023:i:6:p:4680-:d:1089542
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