title: Effect of sodium bicarbonate supplementation on carcass characteristics of lambs fed concentrate diets at different ambient temperature levels.
abstract: The objective of this study was to investigate the influence of ambient temperatures on carcass characteristics of lambs fed concentrate diets with or without NaHCO3 supplementation. A slaughter study was carried on 12 male Black Belly Barbados lambs randomly drawn from a growth trial (35 weeks). The lambs were divided into four equal groups and allotted in a 2×2 factorial design. The lambs were allotted at random to two dietary treatments of a basal diet (35:65 roughage:concentrate) or basal diet supplemented with 4% NaHCO3 at different ambient temperatures (20°C and 30°C) in an environment controlled chamber for 10 days. Lambs were slaughtered for carcass evaluation at about 262 days of age (245 days of growth trial, 7 days adaptation and 10 days of experimental period). Ambient temperature had significant (p<0.05, p<0.05, p<0.01, and p<0.001) effects on meat color from the ribeye area (REA), fat, leg and longissimus dorsi muscles with higher values recorded for lambs in the lower temperature group than those from the higher ambient temperature group. Significant differences (p<0.05) in shear force value (kg/cm(2)) recorded on the leg muscles showed higher values (5.32 vs 4.16) in lambs under the lower ambient temperature group compared to the other group. Dietary treatments had significant (p<0.01, p<0.01, and p<0.05) effects on meat color from the REA, fat, and REA fat depth (cm(2)) with higher values recorded for lambs in the NaHCO3 supplementation group than the non supplemented group. Similarly, dietary treatments had significant differences (p<0.05) in shear force value (kg/cm(2)) of the leg muscles with the NaHCO3 groups recording higher (5.30 vs 4.60) values than those from the other group. Neither ambient temperature nor dietary treatments had any significant (p>0.05) effects on pH, and water holding capacity on both muscles. These results indicated that NaHCO3 supplementation at low ambient temperatures had caused an increase in carcass characteristics leading to significant effect on meat quality.
authors.affiliation: Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan.
authors.forename: Demba B
authors.initials: DB
authors.lastname: Jallow
authors.affiliation: Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan.
authors.forename: Liang Chou
authors.initials: LC
authors.lastname: Hsia
keywords: Ambient Temperature; Carcass; Lambs; Sodium Bicarbonate
references.citation: Small Rumin Res. 2000 Jul 1;37(1-2):35-42
references.pmid: 10818301
references.citation: Meat Sci. 2009 Dec;83(4):604-9
references.pmid: 20416651
references.citation: Meat Sci. 2009 Nov;83(3):511-6
references.pmid: 20416667
references.citation: Trop Anim Health Prod. 2011 Jan;43(1):89-97
references.pmid: 20640886
references.citation: J Anim Sci. 2001 Sep;79(9):2327-35
references.pmid: 11583419
references.citation: Meat Sci. 2007 Dec;77(4):696-702
references.pmid: 22061960
references.citation: Meat Sci. 2008 Jul;79(3):576-81
references.pmid: 22062919
references.citation: Meat Sci. 1989;25(1):59-67
references.pmid: 22056106
references.citation: Meat Sci. 2008 Oct;80(2):210-5
references.pmid: 22063324