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Registros recuperados: 5
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Agriculture biologique et qualité de l'eau : une évaluation des effets de la reconception de systèmes de polyculture élevage Inra
Barataud, F.; Foissy, D.; Burel, E.; Beaudoin, N.; Garnier, J.; Billen, G..
Tipo: Conference Paper Palavras-chave:  .
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011d3bfcbb9&uri=/notices/prodinra1/2011/04/
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Agronomical and environmental performances of organic farming in the Seine watershed, France Organic Eprints
Anglade, J.; Billen, G.; Garnier, J..
This work suggests that Soil Surface Balance is a robust indicator to compare the performances of organic agriculture with those of conventional agriculture, even strictly following the rules of rational and optimised application of fertilisers. The results of long term nitrogen budget calculation brought us to seriously reconsider the relevance of the need to increase crop yields, and more broadly to reconsider cropping patterns and production systems. In terms of policy levers for mitigating nitrogen contamination of water resources, only the shift to organic farming provides a possible way to reconcile agricultural production and water quality. Further, this view points out the need for specific measures to encourage more mixed farming approach to...
Tipo: Conference paper, poster, etc. Palavras-chave: Air and water emissions; Farm nutrient management.
Ano: 2013 URL: http://orgprints.org/24519/1/24519.pdf
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Nitrogen cycling in a hypothetical scenario of generalised organic agriculture in the Seine, Somme and Scheldt watersheds Inra
Thieu, V.; Billen, G.; Garnier, J.; Benoit, M..
Nitrogen contamination of ground and surface water in the Seine, Somme and Scheldt watersheds, as well as in the receiving coastal marine zones, results in severe ecological problems. Previous modelling results showed that the implementation of classical management measures involving improvement of wastewater purification and good agricultural practices are not sufficient to obviate these problems. A more radical scenario was therefore established, consisting of a generalised shift to organic agriculture of all agricultural areas in the three basins, with the additional constraints that livestock is fed only on local fodder production. This scenario involves an increased livestock density in the Seine and Somme and a decrease in livestock in the Scheldt...
Tipo: Journal Article Palavras-chave: SCHELDT  NITROGEN; ORGANIC AGRICULTURE; NITRATE CONTAMINATION; EUTROPHICATION.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011d28249c5&uri=/notices/prodinra1/2011/04/
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Nitrogen leaching from organic agriculture and conventional crop rotations (France) Organic Eprints
Benoit, M.; Garnier, J.; Billen, G.; Mercier, B.; Azougui, A..
A great challenge to science is to elucidate how agriculture can feed the increasing world population without damaging the environment, while preserving other resources such as freshwater. In the Seine basin, characterised by intensive agriculture, most of surface and underground water is contaminated by nitrate. Conventional agriculture has regularly increased the use of industrial fertilisers since the WWII, leading to high nitrogen leaching, as shown by lysimeters or suction cup measurements. Such measurements are very scarce for other agricultural systems such as organic farming (Hansen et al. 2000; Haas et al. 2002; Mondelaers et al. 2009). The goal of our study is to investigate nitrogen leaching from organic agriculture, taking into account complete...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2013 URL: http://orgprints.org/24518/1/24518.pdf
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Reducing marine eutrophication may require a paradigmatic change ArchiMer
Desmit, X.; Thieu, V.; Billen, G.; Campuzano, F.; Duliere, V.; Garnier, J.; Lassaletta, L.; Menesguen, Alain; Neves, R.; Pinto, L.; Silvestre, M.; Sobrinho, J. L.; Lacroix, G..
Marine eutrophication in the North-East Atlantic (NEA) strongly relies on nutrient enrichment at the river outlets, which is linked to human activities and land use in the watersheds. The question is whether human society can reduce its nutrient emissions by changing land use without compromising food security. A new version of Riverstrahler model (pyNuts-Riverstrahler) was designed to estimate the point and diffuse nutrient emissions (N, P, Si) to the rivers depending on land use in the watersheds across a large domain (Western Europe agro-food systems, waste water treatment). The loads from the river model have been used as inputs to three marine ecological models (PCOMS, ECO-MARS3D, MIRO&CO) covering together a large part of the NEA from the Iberian...
Tipo: Text Palavras-chave: North-East Atlantic; Eutrophication; Model scenarios; Land-sea continuum; Land use; Pristine; Management support.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00438/55007/56426.pdf
Registros recuperados: 5
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