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| Titel |
Localising the nitrogen imprint of the Paris food supply: the potential of organic farming and changes in human diet |
| VerfasserIn |
G. Billen, J. Garnier, V. Thieu, M. Silvestre, S. Barles, P. Chatzimpiros |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 1 ; Nr. 9, no. 1 (2012-01-31), S.607-616 |
| Datensatznummer |
250006685
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| Publikation (Nr.) |
 copernicus.org/bg-9-607-2012.pdf |
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| Zusammenfassung |
| The Seine watershed has long been the food-supplying hinterland of Paris,
providing most of the animal and vegetal protein consumed in the city.
Nowadays, the shift from manure-based to synthetic nitrogen fertilisation,
has made possible a strong land specialisation of agriculture in the Seine
watershed: it still provides most of the cereal consumed by the Paris
agglomeration, but exports 80% of its huge cereal production. On the
other hand the meat and milk supply originates mainly from regions in the
North and West of France, specialised in animal farming and importing about
30% of their feed from South America. As it works today, this system is
responsible for a severe nitrate contamination of surface and groundwater
resources. Herein two scenarios of re-localising Paris's food supply are
explored, based on organic farming and local provision of animal feed. We
show that for the Seine watershed it is technically possible to design an
agricultural system able to provide all the plant- and animal-based food
required by the population, to deliver sub-root water meeting the drinking
water standards and still to export a significant proportion of its
production to areas less suitable for cereal cultivation. Decreasing the
share of animal products in the human diet has a strong impact on the
nitrogen imprint of urban food supply. |
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