A comparison of nitrogen (N) budgets for the year 2000 of agro-ecosystems is made for the EU 27 countries by four models with different complexity and data requirements, i.e. INTEGRATOR, IDEAg, MITERRA and IMAGE. The models estimate a comparable total N input in European agriculture, i.e. 23.3-25.7 Mton N yr(-1), but N uptake varies more, i.e. from 11.3 to 15.4 Mton N yr(-1) leading to total N surpluses varying from 10.4 to 13.2 Mton N yr(-1). The estimated overall variation at EU 27 is small for the emissions of ammonia (2.8-3.1 Mton N yr(-1)) and nitrous oxide (0.33-0.43 Mton N yr(-1)), but large for the sum of N leaching and runoff (2.7-6.3 Mton N yr(-1)). Unlike the overall EU estimates, the difference in N output fluxes between models is large at regional scale. This is mainly determined by N inputs, differences being highest in areas with high livestock density.
DE VRIES W.;
LEIP Adrian;
REINDS Gert Jan;
KROS Hans;
LESSCHEN Jan Peter;
BOUWMAN L.;
2012-02-03
ELSEVIER SCI LTD
JRC67334
0269-7491,
http://www.sciencedirect.com/science/article/pii/S0269749111001941,
https://publications.jrc.ec.europa.eu/repository/handle/JRC67334,
10.1016/j.envpol.2011.03.038,
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