AgResearch
Browse

File(s) not publicly available

Temporal in situ synmics of N20 reductase activity as affected by nitrogen fertilization and implications for the N20/(N20+N2) product ratio and N20 mitigation.

journal contribution
posted on 2023-05-03, 21:28 authored by Shuping Qin, Keren DingKeren Ding, Tim Clough, Chunsheng Hu, Jiafa LuoJiafa Luo
In vitro, high nitrate (NO3) concentrations significantly inhibit N2O reductase activity. However, little information is available on the in situ temporal effects of excessive N fertilization on soil N2O reductase activity and the regulation of the N2O/(N2 + N2O) product ratio in agricultural soil. This study examined the monthly in situ dynamics of NO3 − concentration, N2O reductase activity, and N2O/(N2 + N2O) product ratio for 2 years in loamy soil that had received either continuous N fertilizer at 400 kg N ha−1 year−1 for 15 years (N400) or no N fertilizers (CK). N2O reductase activity was significantly lower under the N400 treatment than under the CK and correlated negatively with soil NO3 − concentration. The decrease in N2O reductase activity resulted in the N2O/(N2 + N2O) product ratio increasing. These results demonstrate that excessive N fertilization has the potential to increase N2O emissions by reducing N2O reductase activity in soils. These results highlight the need for N2O mitigation options to embrace the reduction of soil NO3 − concentrations.

History

Rights statement

© Springer-Verlag GmbH Germany 2017

Language

  • English

Does this contain Māori information or data?

  • No

Publisher

Springer Nature

Journal title

Biology and Fertility of Soils

ISSN

0178-2762

Citation

Qin, S., Ding, K., Clough, T. J., Hu, C., & Luo, J. (2017). Temporal in situ synmics of N20 reductase activity as affected by nitrogen fertilization and implications for the N20/(N20+N2) product ratio and N20 mitigation. Biology and Fertility of Soils, 53(7), 723–727. doi:10.1007/s00374-017-1232-y

Usage metrics

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC