Effect of Feed Withdrawal on Yields, Muscle pH, and Texture of Broiler Breast Meat
Effect of Feed Withdrawal on Yields, Muscle pH, and Texture of Broiler Breast Meat
复制标题
停喂饲料对肉鸡胸肉产量、肌肉 pH 值和质地的影响
DOI：
10.3382/ps.0701020
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发表时间：
1991
期刊：
影响因子：
4.4
通讯作者：
R. Wilson
中科院分区：
文献类型：
--
作者：
C. E. Lyon;C. Papa;R. Wilson
摘要测定了不同撤料时间对死后4h去骨胸肉的产量、pH值和剪切值的影响。共有144只商业饲养的雌性肉鸡从当地加工厂的等待区获得，并在地板栏中饲养5天，以恢复与运输到工厂相关的压力。5天后，将这些鸡放入两个饲养场之一48小时，然后进行停食处理。取食时间分别为屠宰前0、8、16或24小时。测量指标包括活体收缩、冷却前和冷却后的屠体产量、胸肉产量、下午2小时和4小时的pH值以及剪切值。随着停食时间的延长，体重逐渐下降。0-h撤除处理的预冷冻率最低。撤料对剪切值的二次效应显著。0h处理的胸肉所需剪切力为7.09 kg，高于8h和16h处理的5.84 kg和5.78 kg，24h处理的胸肉所需剪切力为6.01 kg。结果表明，不同的撤料时间不仅会影响肉鸡的屠宰率，而且还会影响肉品的客观质构。
Abstract The effects of various feed withdrawal times on yields, pH, and shear values of breast meat deboned 4 h post-mortem (PM) were determined. A total of 144 commercially reared female broilers was obtained from the holding area of a local processor, and housed for 5 days in floor pens to recover from the stress associated with transport to the plant. After 5 days, the birds were placed in one of two finishing batteries for 48 h prior to feed withdrawal treatments. Feed withdrawal times were 0, 8, 16, or 24 h prior to slaughter. Measurements included live shrink, prechill and postchill carcass yields, breast meat yield, pH at 2 and 4 h PM, and shear values. There was a progressive loss in body weight as feed withdrawal time increased. The 0-h withdrawal treatment resulted in the lowest prechill yield. Quadratic effect of feed withdrawal on shear values was significant. Breast meat from the 0-h withdrawal treatment required more force to shear, 7.09 kg, than did the meat from the 8 and 16 h treatments, 5.84 and 5.78 kg, respectively, meat from the 24-h treatment required 6.01 kg. The results indicate that feed withdrawal schedules can affect not only the carcass yields but also the objective texture of broiler meat deboned 4 h PM.