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Nutrient recycling in organic farming is related to diversity in farm types at the local level

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorNOWAK, Benjamin
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorNESME, Thomas
dc.contributor.authorDAVID, Christophe
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorPELLERIN, Sylvain
dc.date.accessioned2024-04-08T12:02:24Z
dc.date.available2024-04-08T12:02:24Z
dc.date.issued2015
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196201
dc.description.abstractEnMany authors have focused on the contribution of inner farm nutrient recycling to closed nutrient cycles, but little is known about the contribution of exchanges among farms to nutrient cycling. By using a network approach, we assessed the structure of farm mass flows networks and their consequences for nitrogen (N), phosphorus (P) and potassium (K) recycling in organic farming at the local scale. Organic farming was considered as a prototype of farming systems that aims at better closing nutrient cycles. Inflows and outflows were collected for two cropping years on 63 organic farms. The farms were located in three French agricultural districts with areas ranging from 520 to 1021 km2 and differentiated by their degree of specialization (specialized in crop production, animal production, or mixed). Local nutrient recycling was assessed at the district scale through: (i) the local supply, defined as the ratio of the amount of nutrients from exchanges among farms plus the amount of nitrogen from atmospheric sources, to the sum of inputs to organic farms; and (ii) the cycling index, defined as the fraction of nutrients flowing at least twice through the same farms. Results showed that exchanges among farms were mainly short-distance exchanges (<50 km on average) and contributed up to 70% of farm nutrient inflow. Mass flows among farms were two to four times greater in the mixed district than in specialized districts. As a consequence, both the local supply and the cycling index were greater in the mixed district than in the specialized districts. However, even if the local supply was generally high (85%, 52% and 54% for N, P and K inflows in the mixed district, respectively), the cycling index remained low (5%, 20% and 10% for N, P and K in the mixed district), indicating that most flows among farms were one-way and not actual nutrient recycling. This study contributes to the understanding of the magnitude, conditions and factors of nutrient recycling in agriculture at the local scale.
dc.language.isoen
dc.publisherElsevier
dc.subjectnitrogen
dc.subject.enorganic farming
dc.subject.ennetwork analysis
dc.subject.ennutrient recycling
dc.subject.enfarm diversity
dc.subject.enlandscape agronomy
dc.title.enNutrient recycling in organic farming is related to diversity in farm types at the local level
dc.typeArticle de revue
dc.identifier.doi10.1016/j.agee.2015.02.010
dc.subject.halSciences du Vivant [q-bio]/Sciences agricoles
bordeaux.journalAgriculture, Ecosystems & Environment
bordeaux.page17-26
bordeaux.volume204
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02636045
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02636045v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Agriculture,%20Ecosystems%20&%20Environment&rft.date=2015&rft.volume=204&rft.spage=17-26&rft.epage=17-26&rft.au=NOWAK,%20Benjamin&NESME,%20Thomas&DAVID,%20Christophe&PELLERIN,%20Sylvain&rft.genre=article


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