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|Title:||Comparison of land nitrogen budgets for European agriculture by various modeling approaches|
|Authors:||DE VRIES W.; LEIP Adrian; REINDS Gert Jan; KROS Hans; LESSCHEN Jan Peter; BOUWMAN L.|
|Citation:||ENVIRONMENTAL POLLUTION vol. 159 no. 11 p. 3254-3268|
|Publisher:||ELSEVIER SCI LTD|
|Type:||Articles in Journals|
|Abstract:||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.|
|JRC Institute:||Institute for Environment and Sustainability|
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