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- Title
The effects of R-salbutamol on growth, carcass measures, and health of finishing pigs.
- Authors
Marchant-Forde, J. N.; Lay Jr, D. C.; Marchant-Forde, R. M.; McMunn, K. A.; Richert, B. T.
- Abstract
A pure form of salbutamol has the poten-tial to deliver positive production benefits to the swine industry. The aim of this experiment was to determine the effects of salbutamol on growth, carcass measures, and health of finishing pigs. The study used 192 pigs (89 ± 1 kg BW) housed in groups of 6 in 32 pens and assigned to 1 of 4 treatments: 1) control (CTL), 0 mg/kg salbutamol; 2) 2R, control diet with 2 mg/kg of the pure R-enantiomer of salbutamol; 3) 4R, control diet with 4 mg/kg of pure R-salbutamol; or 4) 8RS, control diet with 8 mg/kg of a 50:50 mixture of the R- and S-enan-tiomers. All diets were offered ad libitum for 4 wk. All pigs were weighed and pen feed intakes were recorded weekly. At slaughter, individual HCW and measure-ments of the lOth-rib loin muscle area (LMA), color, marbling, firmness, and back fat, last lumbar, and mid-line back fat depths were collected. Data were analyzed using Proc GLM of SAS, with pen as the experimental unit. Overall, 2R and 4R pigs had greater ADG than CTL pigs (P < 0.05) and, at slaughter, were heavier than CTL pigs (P < 0.01). Overall, 8RS pigs had decreased ADFI {P < 0.05), and CTL pigs had poorer G:F (P < 0.001) than the other 3 treatments. All salbutamol-fed pigs had 5 to 6 kg greater HCW (P < 0.001), 2% to 3% increased carcass yield (P < 0.001), 5.6 cm2 larger LMA CP < 0.01), 3 to 4 mm less lOth-rib back fat (P < 0.01), and 2 mm less lumbar back fat (P < 0.05) than CTL pigs. However, control pigs had greater loin muscle color scores (P < 0.05) and marbling scores (P < 0.001) than all salbutamol-treated pigs. Taken together, these data indicate that as little as 2 mg/kg R-salbutamol has a positive effect on pig growth and carcass composition. However, the effects of salbutamol on meat quality re-quire further research.
- Subjects
ALBUTEROL; SWINE growth; SWINE carcasses; PORK industry; PELVIS; BODY composition of swine
- Publication
Journal of Animal Science, 2012, Vol 90, Issue 11, p4081
- ISSN
0021-8812
- Publication type
Article
- DOI
10.2527/jas.2011-4423