Effects of plant extracts and essential oils as feed supplements on quality and microbial traits of rabbit meats
Document en anglais qui présente les effets sur la qualité de la viande d'ajouts de suppléments alimentaires à base d'extraits d'oignons, de canneberges, de framboises et d'huiles essentielles à la ration des lapins. Cinq groupes de 48 femelles Grimaud sevrées ont reçu les suppléments ou la ration de contrôle. Plusieurs paramètres ont été évalués au niveau de la qualité de la viande (pH, cuisson, quantité d'antioxydants, etc.) après 4 semaines d'engraissement. Les résultats démontrent que l'ajout de suppléments d'extraits de plantes n'ont pas eu d'effets significatifs sur l'engraissement ou la qualité de la viande. Toutefois, les résultats indiquent que l'ajout de suppléments riches en polyphénols (en particulier les huiles essentielles) ont un effet positif sur la réduction de la microflore bactérienne. En conclusionles extraits de plantes et d'huiles essentielles peuvent être utilisées sans risque d'effets indésirables sur l'engraissemen tou la qualité de la viande dans la diète des lapins. Les effets positifs pourraient être optimisés en expérimentant des doses plus élevées.
Retrouvez plusieurs publications de Linda Saucier Ph.D. agr. chm. concernant la recherche sur la qualité de la viande de lapin sur le site Le lapin du Québec.
Abstract : The effects of dietary supplementation with onion, cranberry and strawberry extracts and essentials oils on meat quality were analysed. Five groups of 48 Grimaud female weaned rabbits received the supplemented or the control ration; the experimental unit was a cage of 6 rabbits. Each experimental diet contained 10 ppm of added active ingredients. Rabbits were fed with the experimental diets for 4 wk before determining slaughter and carcass traits and determining the pH at 1 and 24 h post mortem (pHu) of the Longissimus dorsi (LD) and the Biceps femoris muscle, left and right, respectively. Cooking loss, drip loss and L*, a* and b* colour parameters were obtained for the rightLD and for ground meat and antioxidant status (TBARS, DNPH, Folin Ciocalteu) was measured. Only the pHu of the LD muscle for the strawberry supplemented group was significantly lower when compared to the control group (P=0.04). However, we note that for the pH of the LD, the average was less than 6 for the meat of animals that received a diet enriched in polyphenols, compared to the control group. Plant extract supplementation did not influence meat quality traits, growth performance or oxidative stability. However, under aerobic and anaerobic conditions, our results indicate that dietary supplementation with extracts rich in polyphenols, especially with essential oils, had a small but sporadic positive effect in reducing bacterial microflora compared to the control group (P<0.05). In conclusion, plant extracts and essential oils can be used in a rabbit diet without adverse effects on performance and meat quality traits. This effect could be optimised by investigating higher doses.Key Words: essential oils, plant extract, polyphenol, rabbit meat, shelf life.
Retrouvez plusieurs publications de Linda Saucier Ph.D. agr. chm. concernant la recherche sur la qualité de la viande de lapin sur le site Le lapin du Québec.
Abstract : The effects of dietary supplementation with onion, cranberry and strawberry extracts and essentials oils on meat quality were analysed. Five groups of 48 Grimaud female weaned rabbits received the supplemented or the control ration; the experimental unit was a cage of 6 rabbits. Each experimental diet contained 10 ppm of added active ingredients. Rabbits were fed with the experimental diets for 4 wk before determining slaughter and carcass traits and determining the pH at 1 and 24 h post mortem (pHu) of the Longissimus dorsi (LD) and the Biceps femoris muscle, left and right, respectively. Cooking loss, drip loss and L*, a* and b* colour parameters were obtained for the rightLD and for ground meat and antioxidant status (TBARS, DNPH, Folin Ciocalteu) was measured. Only the pHu of the LD muscle for the strawberry supplemented group was significantly lower when compared to the control group (P=0.04). However, we note that for the pH of the LD, the average was less than 6 for the meat of animals that received a diet enriched in polyphenols, compared to the control group. Plant extract supplementation did not influence meat quality traits, growth performance or oxidative stability. However, under aerobic and anaerobic conditions, our results indicate that dietary supplementation with extracts rich in polyphenols, especially with essential oils, had a small but sporadic positive effect in reducing bacterial microflora compared to the control group (P<0.05). In conclusion, plant extracts and essential oils can be used in a rabbit diet without adverse effects on performance and meat quality traits. This effect could be optimised by investigating higher doses.Key Words: essential oils, plant extract, polyphenol, rabbit meat, shelf life.