Evaluation of the effectiveness of N process inhibitors in paddy rice via a N-15 tracing approach - Research portal of Justus Liebig University Giessen:

Journal article

Evaluation of the effectiveness of N process inhibitors in paddy rice via a N-15 tracing approach

Authors list: Liu, SY; Chi, QD; Shan, J; Zhu, B; Zhang, XF; Cheng, Y; Cai, ZC; Zhang, JB; Yan, XY; Müller, C

Publication year: 2020

Journal: Soil Biology and Biochemistry

Volume number: 147

ISSN: 0038-0717

DOI Link: https://doi.org/10.1016/j.soilbio.2020.107855

Publisher: Elsevier

Abstract:
Nitrogen (N) stabilizers, e.g. nitrification inhibitor (NIs), urease inhibitor (UIs), or combined NIs and UIs (NUIs) have been recommended to reduce N losses, and improve fertilizer N use efficiency (NUE) and crop yield. However, the effectiveness of N stabilizers on rice yield and NUE varies greatly and the underlying mechanisms are not well understood. We performed a series of N-15 tracing experiments in the laboratory and in the field of two paddy soils with contrasting pH (pH 5.18 and 7.83) to evaluate the effects of N stabilizers on gross rates of soil N transformations, rice yield, NUE and N loss. Results showed that in acidic soil the NI and NUI did not significantly affect the NH4+ residence time and the potential risk of N loss (gross nitrification rate (O-NH4) + NH3 volatilization (V-NH3), O-NH4 + V-NH3). However, the NI significantly inhibited O-NH4 reducing the combined ammoniacal N loss (O-NH4 and V-NH3) by 19.7% and prolonging the NH4+ residence time in alkaline soil. Similarly, NUI also reduced O-NH4 + V-NH3 by 15.8%, thus, increasing the residence time of ammoniacal N in alkaline soil. The results of the field trial showed that application of NI and NUI can improve rice yield and NUE by extending a residence time of NH4+ in alkaline soil, but not in acidic soil. This study provided information under which conditions NIs and/or NUIs can be recommended to enhance rice production while reducing environmental impacts.

Authors/Editors

- Uni.-Prof. Ph.D. Christoph Müller

Citation Styles

Harvard Citation style: Liu, S., Chi, Q., Shan, J., Zhu, B., Zhang, X., Cheng, Y., et al. (2020) Evaluation of the effectiveness of N process inhibitors in paddy rice via a N-15 tracing approach, Soil Biology and Biochemistry, 147, Article 107855. https://doi.org/10.1016/j.soilbio.2020.107855

APA Citation style: Liu, S., Chi, Q., Shan, J., Zhu, B., Zhang, X., Cheng, Y., Cai, Z., Zhang, J., Yan, X., & Müller, C. (2020). Evaluation of the effectiveness of N process inhibitors in paddy rice via a N-15 tracing approach. Soil Biology and Biochemistry. 147, Article 107855. https://doi.org/10.1016/j.soilbio.2020.107855

SDG Areas