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Do Metals Increase or Decrease Nitrous Oxide Emissions and Maize Yields from Upland Soils?

Author

Listed:
  • Ye Lim Park

    (Department of Applied Environmental Science, Kyung Hee University, Yongin 17104, Korea)

  • Hyun Ho Lee

    (School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea)

  • Sung Un Kim

    (Department of Life Science and Environmental Biochemistry, Pusan National University, Miryang 50463, Korea
    Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea)

  • Namgoo Kang

    (Measurment Instrumentation and Data Verification Research Team, Advanced Measurement Instrumentation Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Korea
    Odyssey Education Program, University of Science and Technology, Daejeon 34113, Korea)

  • Chang Oh Hong

    (Department of Life Science and Environmental Biochemistry, Pusan National University, Miryang 50463, Korea
    Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea)

Abstract

Metals, including copper (Cu), iron (Fe), and zinc (Zn), are associated with nitrous oxide (N 2 O) production processes, such as nitrification and denitrification. This study aimed to elucidate the effects of Cu, Fe, and Zn on N 2 O emissions and to determine cumulative N 2 O emission and crop yields from upland soils. Metals were applied at a rate of 20 kg ha −1 in upland soil supporting maize ( Zea mays L.) growth in 2018 and 2019. While the mean value of cumulative N 2 O emissions across both years was 5.19 kg N 2 O ha −1 yr −1 for the control soil, those of soil treated with Cu, Fe, and Zn were 3.37, 2.48, and 4.82 kg N 2 O ha −1 yr −1 , respectively. Ammonium (NH 4 + ) concentration in soil was highest after Fe application, and nitrate (NO 3 − ) concentration was lowest. The copy number of the amoA gene related to NH 4 + oxidation was lowest after Fe enhancement, implying that nitrification was inhibited. Furthermore, N 2 O emission decreased with Cu addition because the copy number of the nosZ gene associated with N 2 O reduction to N 2 was the highest. Because Cu and Fe decreased yield-scaled N 2 O emission, the application of either metal could reduce N 2 O emission per unit area of maize production, suggesting that both metals are beneficial soil amendments for reducing N 2 O emissions while maintaining maize yield.

Suggested Citation

  • Ye Lim Park & Hyun Ho Lee & Sung Un Kim & Namgoo Kang & Chang Oh Hong, 2022. "Do Metals Increase or Decrease Nitrous Oxide Emissions and Maize Yields from Upland Soils?," Agriculture, MDPI, vol. 12(9), pages 1-16, September.
  • Handle: RePEc:gam:jagris:v:12:y:2022:i:9:p:1458-:d:914053
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    References listed on IDEAS

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    1. Ziyi Feng & Yongxiang Yu & Huaiying Yao & Chaorong Ge, 2021. "Effect of Zinc Oxide Nanoparticles on Nitrous Oxide Emissions in Agricultural Soil," Agriculture, MDPI, vol. 11(8), pages 1-12, July.
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