Comparison of models used for national agricultural ammonia emission inventories in Europe: Litter-based manure systems

Reidy, Beat; Webb, J.; Misselbrook, T.H.; Menzi, H.; Luesink, H.H.; Hutchings, N.J.; Eurich-Menden, B.; Döhler, H.; Dämmgen, U. (2009). Comparison of models used for national agricultural ammonia emission inventories in Europe: Litter-based manure systems Atmospheric Environment, 43(9), pp. 1632-1640. Elsevier 10.1016/j.atmosenv.2008.12.015

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Six N-flow models, used to calculate national ammonia (NH3) emissions from agriculture in different European countries, were compared using standard data sets. Scenarios for litter-based systems were run separately for beef cattle and for broilers, with three different levels of model standardisation: (a) standardized inputs to all models (FF scenario); (b) standard N excretion, but national values for emission factors (EFs) (FN scenario); (c) national values for N excretion and EFs (NN scenario). Results of the FF scenario for beef cattle produced very similar estimates of total losses of total ammoniacal-N (TAN) (±6% of the mean total), but large differences in NH3 emissions (±24% of the mean). These differences arose from the different approaches to TAN immobilization in litter, other N losses and mineralization in the models. As a result of those differences estimates of TAN available at spreading differed by a factor of almost 3. Results of the FF scenario for broilers produced a range of estimates of total changes in TAN (±9% of the mean total), and larger differences in the estimate of NH3 emissions (±17% of the mean). The different approaches among the models to TAN immobilization, other N losses and mineralization, produced estimates of TAN available at spreading which differed by a factor of almost 1.7. The differences in estimates of NH3 emissions decreased as estimates of immobilization and other N losses increased. Since immobilization and denitrification depend also on the C:N ratio in manure, there would be advantages to include C flows in mass-flow models. This would also provide an integrated model for the estimation of emissions of methane, non-methane VOCs and carbon dioxide. Estimation of these would also enable an estimate of mass loss, calculation of the N and TAN concentrations in litter-based manures and further validation of model outputs.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Agricultural, Forest and Food Sciences HAFL > Resource-efficient agricultural production systems School of Agricultural, Forest and Food Sciences HAFL > Agriculture
Name:	Reidy, Beat0000-0002-8619-0209; Webb, J.; Misselbrook, T.H.; Menzi, H.; Luesink, H.H.; Hutchings, N.J.; Eurich-Menden, B.; Döhler, H. and Dämmgen, U.
Subjects:	G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QD Chemistry S Agriculture > SF Animal culture
ISSN:	13522310
Publisher:	Elsevier
Language:	English
Submitter:	Simon Lutz
Date Deposited:	10 Dec 2019 09:05
Last Modified:	18 Dec 2020 13:29
Publisher DOI:	10.1016/j.atmosenv.2008.12.015
Uncontrolled Keywords:	Inventory, Ammonia, Emission, Emission factor, N-flow model, Total ammoniacal-N (TAN), Solid manure Agriculture
ARBOR DOI:	10.24451/arbor.9239
URI:	https://arbor.bfh.ch/id/eprint/9239