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Réponses à la sélection pour deux critères d'efficacité alimentaire chez le lapin. 3. Analyse de la digestion et des rejets

Abstract : Two lines of rabbits were created to improve feed efficiency (FE) between weaning and 63 days of age, according to two criteria i) residual intake (ConsoResiduelle line), ii) the average daily gain with restricted feeding (line GMQRestreint). Digestion and slurry output of these lines were compared to a control line (G0), under ad-libitum feeding (AL) or restricted by 20% (R). After nine generations of selection, the feed conversion ratio is reduced from 0.1 to 0.2 pts (resp. for ConsoResiduelle and GMQRestreint), and is associated with a better nitrogen retention (decreased urine output). Between 29 and 63d old, nitrogen output is reduced by about 12% in the two selected lines, while the output of phosphorus remained unchanged. The feed restriction improved the digestion and the retention of nitrogen (+5 points), and led to a 35% reduction of the nitrogen output and to 50% less phosphorus output.
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  • HAL Id : hal-02742752, version 1
  • PRODINRA : 338387

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Thierry Gidenne, Herve Garreau, Caroline Molette, Laurence Drouilhet, Hélène Gilbert, et al.. Réponses à la sélection pour deux critères d'efficacité alimentaire chez le lapin. 3. Analyse de la digestion et des rejets. 16. Journées de la Recherche Cunicole, Nov 2015, Le Mans, France. 264 p. ⟨hal-02742752⟩

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