关键词: 旧院黑鸡, 屠宰性能, 肉品质

Abstract: 【Objective】 This experiment is intended to determine the economic value of the Jiuyuan black fowls, and offer a reference for the further breeding of the Jiuyuan black fowls.【Methods】We used 120 Jiuyuan black fowls to detect the slaughtering performance and meat quality factors of these male and female chicken at different ages in days ( 90、120 and 150). 【Results】Results indicated that with the growth of the age, the weight of breast and leg muscles gained gradually, the dressing percentage of male chicken decreased, while this percentage of female chicken increased. The 150-old-day Jiuyuan black fowls showed better slaughtering performance. In terms of meat quality, pH value, the content of crude protein lowered as the chicken grew up, but meanwhile the content of inosine monophosphate(IMP), intramuscular fat(IMF) increased. According to the analysis of relevant evaluating indicators of meat quality, the 120-day-old chicken have the relatively better meat quality. 【Conclusion】The best age of Jiuyuan black fowls to come into the market is 120 days through comprehensive analysis.

Key words: Jiuyuan black fowls, slaughtering performance, meat quality