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Évaluation par analyse de cycle de vie de stratégies de baisse du taux protéique dans les aliments pour porcs charcutiers

Abstract : Reducing dietary crude protein (CP) is a recognized strategy to reduce environmental impacts of fattening pigs. This study evaluated environmental impacts of dietary CP reductions made possible by the availability of new feed-grade amino acids (AA), in the current French context. Dietary CP reductions of -1.0, -1.5 and -2.0 percentage points compared to current practices (Ref), allowing the incorporation of soybean products or not, providing all of the feed-grade AA available or only until Val, with two lysine origins were explored for a restricted two-phase feeding plan. Life cycle assessment was performed with two sets of system boundaries: LIM1 (feed production, housing, slurry storage) and LIM2 (LIM1 + spreading and savings in mineral fertilisers). Despite a significant effect of CP reduction and the AA provided on growth performances (P < 0.05), absolute variations were small. Energy demand increased and acidification decreased after CP reduction (P<0.05). Climate change decreased after a 1-percentage-point reduction in CP and exclusion of soybean but increased after CP reduction in the other scenarios (P<0.05). These two impacts were higher when using Chinese lysine (P<0.05) compared to European lysine. Eutrophication decreased after CP was reduced by 1 percentage point but increased when it was reduced further (P<0.05). Land use increased after CP reduction and exclusion of soybean (P<0.05). A deficit in AA had no effect on environmental impacts. System boundaries had a significant effect (P<0.05) on all impacts except land use, with an interaction with CP level for acidification (P<0.05). Very low CP strategies reduce impacts primarily caused by nitrogen emissions but increase feed-production impacts if diets are not formulated according to environmental constraints.
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https://hal.inrae.fr/hal-03627759
Contributor : Emilie Bernard Connect in order to contact the contributor
Submitted on : Friday, April 1, 2022 - 2:40:52 PM
Last modification on : Thursday, September 8, 2022 - 5:39:18 PM

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  • HAL Id : hal-03627759, version 1

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Léa Cappelaere, Marie-Pierre Letourneau-Montminy, William Lambert, Nicolas Martin, Florence Garcia-Launay. Évaluation par analyse de cycle de vie de stratégies de baisse du taux protéique dans les aliments pour porcs charcutiers. 54. Journées de la recherche porcine, Ifip; Inrae, Feb 2022, En ligne, France. pp.215-220. ⟨hal-03627759⟩

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