TY - JOUR
T1 - Implementation of the effect of urease inhibitor on ammonia emissions following urea-based fertilizer application at a Zea mays field in central Illinois
T2 - A study with SURFATM-NH 3 model
AU - Lichiheb, Nebila
AU - Myles, La Toya
AU - Personne, Erwan
AU - Heuer, Mark
AU - Buban, Michael
AU - Nelson, Andrew J.
AU - Koloutsou-Vakakis, Sotiria
AU - Rood, Mark J.
AU - Joo, Eva
AU - Miller, Jesse
AU - Bernacchi, Carl
N1 - The lead author acknowledges support from National Academies/National Research Council Research Associateship Program . The authors gratefully acknowledge funding from the National Science Foundation (Award Numbers 1233458 and 1236814). The scientific results and conclusions, as well as any views or opinions expressed herein, are those of the author(s) and do not necessarily reflect the views of NSF, NOAA, or the Department of Commerce.
PY - 2019/5/15
Y1 - 2019/5/15
N2 - Agriculture is the main source of ammonia (NH 3 ) emissions in the atmosphere. NH 3 is precursor to secondary fine particulate matter, which is of concern for its impacts on health and visibility. There are a limited number of field measurements of NH 3 emissions from fertilizer application in the US, and this limits our understanding of the importance of individual NH 3 source and sink processes in controlling timing and magnitude of NH 3 emissions. In this study, a new parameterization of the effect of urease inhibitor on NH 3 emissions from urea-based fertilizer was developed on the basis of experimental results found in the literature. This parameterization was combined with an existing operational parameterization of soil and stomatal emission potentials (Γ g , Γ s ) and was implemented in a surface-atmosphere transfer model for NH 3 (SURFATM-NH 3 ) in order to evaluate the bi-directional fluxes of NH 3 at the field scale. The model was evaluated with field measurements obtained by the flux-gradient (FG) and relaxed eddy accumulation (REA) methods in a fertilized corn field in central Illinois. By integrating the effect of urease inhibitor, the timing of the highest NH 3 emission peak was successfully predicted and its magnitude was close to that measured (predicted 2106 ng m −2 s −1 , measured by FG 2312 ± 582 ng m −2 s −1 ). Based on the model results, urease inhibitor has a considerable effect on the dynamics and order of magnitude of NH 3 fluxes. Furthermore, the model simulated the inhibiting action of N-(n-butyl) thiophosphoric (nBTPT) and suggests that it can reduce NH 3 volatilization by 32%. The model also successfully predicted environmental parameters, such as soil temperature. Finally, this new version of SURFATM-NH 3 is a valuable tool to estimate the NH 3 bi-directional fluxes at the field scale, which describes dynamic modeling of Γ s and Γ g by taking into account the effect of urease inhibitor which is commonly used in the US to improve the efficiency of urea fertilizers.
AB - Agriculture is the main source of ammonia (NH 3 ) emissions in the atmosphere. NH 3 is precursor to secondary fine particulate matter, which is of concern for its impacts on health and visibility. There are a limited number of field measurements of NH 3 emissions from fertilizer application in the US, and this limits our understanding of the importance of individual NH 3 source and sink processes in controlling timing and magnitude of NH 3 emissions. In this study, a new parameterization of the effect of urease inhibitor on NH 3 emissions from urea-based fertilizer was developed on the basis of experimental results found in the literature. This parameterization was combined with an existing operational parameterization of soil and stomatal emission potentials (Γ g , Γ s ) and was implemented in a surface-atmosphere transfer model for NH 3 (SURFATM-NH 3 ) in order to evaluate the bi-directional fluxes of NH 3 at the field scale. The model was evaluated with field measurements obtained by the flux-gradient (FG) and relaxed eddy accumulation (REA) methods in a fertilized corn field in central Illinois. By integrating the effect of urease inhibitor, the timing of the highest NH 3 emission peak was successfully predicted and its magnitude was close to that measured (predicted 2106 ng m −2 s −1 , measured by FG 2312 ± 582 ng m −2 s −1 ). Based on the model results, urease inhibitor has a considerable effect on the dynamics and order of magnitude of NH 3 fluxes. Furthermore, the model simulated the inhibiting action of N-(n-butyl) thiophosphoric (nBTPT) and suggests that it can reduce NH 3 volatilization by 32%. The model also successfully predicted environmental parameters, such as soil temperature. Finally, this new version of SURFATM-NH 3 is a valuable tool to estimate the NH 3 bi-directional fluxes at the field scale, which describes dynamic modeling of Γ s and Γ g by taking into account the effect of urease inhibitor which is commonly used in the US to improve the efficiency of urea fertilizers.
KW - Ammonia
KW - Atmospheric chemistry
KW - Emission potentials
KW - Modeling
KW - Urea fertilizer
KW - Urease inhibitor
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U2 - 10.1016/j.agrformet.2019.02.005
DO - 10.1016/j.agrformet.2019.02.005
M3 - Article
AN - SCOPUS:85061377381
SN - 0168-1923
VL - 269-270
SP - 78
EP - 87
JO - Agricultural and Forest Meteorology
JF - Agricultural and Forest Meteorology
ER -