Warriss P D, Kestin S C, Rolph T P, Brown S N
AFRC Institute of Food Research, Langford, Bristol, UK.
J Anim Sci. 1990 Jan;68(1):128-36. doi: 10.2527/1990.681128x.
The beta-adrenergic agonist Salbutamol was administered to pigs at 3 ppm in the feed between weaning and slaughter at 85 kg. Growth rate was not affected by Salbutamol. Treated pigs had a higher dressing percentage (2.6%) and produced carcasses that were less fat (17%) and had longissimus (LD) muscles of larger (11%) cross-sectional area. They also had smaller livers that contained less glycogen. The thinner backfat in treated animals was less firm and tended to separate from the underlying lean. However, these changes were attributable solely to the reduced fatness and there was no direct effect of Salbutamol. There were no differences in pH 45 min postmortem, percentage drip loss during storage or reflectance value of the LD between the two groups, indicating no greater propensity for Salbutamol-treated pigs to develop pale, soft, exudative muscle. However, treated pigs had higher final pH values in the muscles; this was reflected in slightly reduced hue and saturation values. These results suggest that the propensity of the pigs to develop dark, firm, dry meat was slightly increased. Salbutamol-treated pigs produced LD muscles that were slightly tougher (22%), had reduced concentration of heme pigments in the muscle, reduced plasma glucose and increased plasma creatine phosphokinase activity. Salbutamol improved lean meat yield but slightly increased the potential to produce dark, firm, dry meat and reduced tenderness.
在断奶至体重达85千克屠宰期间，给猪投喂浓度为3 ppm的β-肾上腺素能激动剂沙丁胺醇。沙丁胺醇对生长速度没有影响。经处理的猪屠宰率更高（高2.6%），胴体脂肪更少（低17%），背最长肌（LD）横截面积更大（大11%）。它们的肝脏也更小，肝糖原含量更低。经处理动物的背膘更薄，质地更软，且易于与下层瘦肉分离。然而，这些变化完全归因于脂肪减少，而非沙丁胺醇的直接作用。两组猪宰后45分钟时的pH值、储存期间的滴水损失百分比或LD的反射率值均无差异，这表明经沙丁胺醇处理的猪出现苍白、柔软、渗水肉的倾向并未增加。然而，经处理的猪肌肉的最终pH值更高；这反映在色泽和饱和度值略有降低上。这些结果表明，猪产生黑、硬、干肉的倾向略有增加。经沙丁胺醇处理的猪的LD肌稍硬（硬22%），肌肉中血红素色素浓度降低，血糖降低，血浆肌酸磷酸激酶活性增加。沙丁胺醇提高了瘦肉产量，但略微增加了产生黑、硬、干肉的可能性，并降低了嫩度。
