Scenario modeling of ammonia emissions from surface applied urea under temperate conditions: application effects and model comparison

Pacholski, Andreas; Doehler, Johannes; Schmidhalter, Urs; Kreuter, Thomas

doi:10.1007/s10705-017-9883-5

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…In particular, NH 3 emission from U from 2001 to 2010 were much less variable with years and were limited to a small range of 1-3.4% of urea-N applied during the growing seasons of winter wheat [6,[25][26][27][28][29]. A simulation study on modeling NH 3 emissions across Germany [30] showed that NH 3 emissions (% urea N applied) were in a range of 0-10% in strong contrast to the averaged 24% for European arable soils assumed by EMEP/EEA [31].…”

Section: Experimental Site and Designmentioning

confidence: 99%

Direct and Indirect Effects of Urease and Nitrification Inhibitors on N2O-N Losses from Urea Fertilization to Winter Wheat in Southern Germany

Gaßner

Weber

et al. 2020

Atmosphere

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Urea (U) is the most important nitrogen (N) fertilizer in agriculture worldwide, and as N fertilizer can result in large gaseous losses of NH3 and N2O. Thus, urease inhibitors (UIs) and nitrification inhibitors (NIs) have been coupled with U fertilizers to mitigate NH3 and N2O emissions. However, it is still unclear whether adding NIs and/or UIs to U stimulates other pollutants, while reducing one pollutant. Furthermore, part of the NH3 deposition to earth is converted to N2O, leading to indirect N2O emission. To estimate direct and indirect effect of UIs and NIs on the N2O-N and NH3-N losses from U; therefore, we analyzed multi-year field experiments from the same site during 2004 to 2005 and 2011 to 2013. The field experiments with U fertilization with or without UI (IPAT, N-isopropoxycarbonyl phosphoric acid triamide) and NI (DCD/TZ, Dicyandiamide/1H-1, 2, 4-Triazol) in winter wheat and with calcium ammonium nitrate (CAN) were conducted in southern Germany. Fluxes of NH3 or N2O emissions were determined following each split N fertilization in separate experiments on the same site. Our results showed that U with NIs considerably reduced N2O emissions, and adding UIs decreased NH3 emissions. However, the effect on N2O emissions exerted by (U + UIs) or (U + UIs + NIs) was inconsistent. In contrast to the treatment of (U + UIs + NIs), the addition of NIs alone to U stimulated NH3 emission compared to treatment with U. When 1% indirect N2O emission from NH3 (IPCC emission factor (EF4)) was considered to estimate the indirect N2O emission, total N2O emissions from (U + NIs) were approximately 29% compared to that from U alone and 36% compared to that from (U + UI), indicating that indirect N2O emission from NH3 induced by NIs may be negligible.

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Section: Experimental Site and Designmentioning

confidence: 99%

Direct and Indirect Effects of Urease and Nitrification Inhibitors on N2O-N Losses from Urea Fertilization to Winter Wheat in Southern Germany

Gaßner

Weber

et al. 2020

Atmosphere

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“…Emission factors are used to compile large scale inventories of emissions if not sufficient measurements are available. Pacholski et al (2018) used two modelling approaches to estimate NH 3 emission from three cropping systems in Germany, where NH 3 emissions deviating from standard emission factors were used. Scenario modelling based on weather and soil data, using a statistical model, was able to predict NH 3 emissions satisfactorily and hence can be a suitable tool to derive robust NH 3 emissions factors for fertilized cropping systems.…”

Section: Nitrogen Processes At Different Scalesmentioning

confidence: 99%