PDF(Pubmed)
Abstract：
Meat qualities of free-range chicken (Xuan-Zhou) (XZ-FRC) are closely associated with slaughter age and directly influence the economic benefits of supplier and consumer\'s preference. Understanding of the relationship between meat qualities and ages will be of prime important to explore a better slaughter age of XZ-FRC. In this study, the quality traits of breast and thigh muscles from XZ-FRCs at 9 to 14 wk were analyzed to establish a relatively reliable method for selecting a better slaughter age. The results showed that the effects of slaughter ages on color (CIE L*, a* and b* values), shear force, centrifugal loss, and flavor of XZ-FRCs were significant (P < 0.05). There were greater differences in meat qualities, whatever breast or thigh muscles, between same or different ages. Eleven feature indexes used for colligation evaluation of slaughter age were selected by combining the quality characteristics and data analysis. The score of colligation evaluation for XZ-FRCs at 12 wk was higher than that at 9 and 14 wk, suggesting that the 12 wk was an optimal slaughter age. This work would provide a reference method that helps the producers of livestock and poultry to select a better slaughter age.
摘要：
散养鸡(宣周)(XZ-FRC)的肉质与屠宰年龄密切相关，直接影响着供应商和消费者偏好的经济效益。了解肉质与年龄之间的关系对于探索更好的XZ-FRC屠宰年龄至关重要。在这项研究中,分析了XZ-FRC在9至14周的乳房和大腿肌肉的质量特征，以建立相对可靠的方法来选择更好的屠宰年龄。结果表明，屠宰年龄对颜色的影响(CIEL*，a*和b*值)，剪切力,离心损失，XZ-FRC的风味显著(P<0.05)。肉质差异更大，无论乳房或大腿肌肉，在相同或不同年龄之间。通过质量特征和数据分析相结合，选择了11个用于屠宰年龄综合评价的特征指标。12周XZ-FRC的综合评估得分高于9周和14周，这表明12周是最佳屠宰年龄。这项工作将为畜禽生产者选择更好的屠宰年龄提供参考方法。
