1923
Effect of sodium butyrate administered in the concentrate on rumen development and productive performance of lambs in intensive production system during the suckling and the fattening periods

Wednesday, July 23, 2014
Exhibit Hall AB (Kansas City Convention Center)
Sara Cavini , Animal Nutrition and Welfare Service, Universitat Autonoma de Barcelona, Bellaterra, Spain
Sergio Iraira , Animal Nutrition and Welfare Service, Universitat Autonoma de Barcelona, Bellaterra, Spain
Adriana Siurana , Animal Nutrition and Welfare Service, Department of Animal and Food Sciences, Universitat AutÚnoma de Barcelona, Bellaterra 08193, Spain
Andreas Foskolos , Animal Nutrition and Welfare Service, Universitat Autonoma de Barcelona, Bellaterra, Spain
Alfred Ferret , Animal Nutrition and Welfare Service, Universitat Autonoma de Barcelona, Bellaterra, Spain
Miguel A Gomez , Nutega/Novation, Madrid, Spain
Sergio Calsamiglia , Animal Nutrition and Welfare Service, Universitat Autonoma de Barcelona, Bellaterra, Spain
Abstract Text: Sodium butyrate (SB) has been shown to improve growth rate, rumen development and health of calves. In intensive lamb production systems, the fattening period starts after a relative short suckling period, and lambs are fed a high concentrate diet. The aim of this experiment was to determine the effect of supplementing SB in the concentrate on rumen development and productive performance of lambs during the suckling and the fattening periods. During suckling, 66 Ripollesa-breed lambs were distributed with their mothers in 4 pens. Treatments were: control concentrate (CON), and concentrate supplemented with 3.6 g of SB (Butirex C4)/Kg of DM (SBC). At weaning, 9 lambs were slaughtered for sample collection and 10 were use for the herd replacement, and the remaining 47 lambs were distributed into 12 pens for the fattening period. Treatments were: 1) CON-CON for lambs fed CON in both periods; 2) CON-SBC for lambs fed CON in the suckling and SBC in the fattening period; 3) SBC-CON for lambs fed SBC in the suckling and CON in the fattening period, and 4) SBC-SBC for lambs fed SBC in both periods. At 88 days of age all lambs were slaughtered. In both periods, concentrate dry matter intake (DMI), average daily gain (ADG), body weight (BW), hot carcass weight (HCW), dressing percentage (DP), reticulum-rumen weight (RRW), rumen fluid pH, and density, length, width and keratinization of rumen papillae were measured. Feed conversion ratio (FCR) was calculated for the fattening period only. During the suckling period, SBC lambs had higher DMI (69.3 vs 101.7 g ± 6.25), ADG (232.0 vs 250.5g ± 5.84), HCW (8.42 vs 9.23kg ± 0.196) and DP (49.3 vs 53.8% ± 1.04) (P < 0.05), and tended to have higher rumen papillae length (1.15 vs 1.68 mm ± 0.168) and lower RRW (303.4 vs 262.7g ± 12.8; P < 0.10). During the fattening period, no difference was found among treatments. Results indicate that the supplementation of SB in the concentrate improved rumen development and productive performance of lambs during the suckling period. However, at 3 months of age, the administration of SB did not improve production in lambs reared in an intensive production system.

Keywords: sodium butyrate, lamb, rumen development, productive performance.