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
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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UR - http://www.scopus.com/inward/citedby.url?scp=85061377381&partnerID=8YFLogxK
U2 - 10.1016/j.agrformet.2019.02.005
DO - 10.1016/j.agrformet.2019.02.005
M3 - Article
AN - SCOPUS:85061377381
VL - 269-270
SP - 78
EP - 87
JO - Agricultural and Forest Meteorology
JF - Agricultural and Forest Meteorology
SN - 0168-1923
ER -