五华三黄鸡山地放养条件下肉用性能及肉品质的研究

为探讨山地放养模式对五华三黄鸡的肉用性能及肉品质的影响,选取100只1日龄的五华三黄鸡作为试验动物,对其进行210 d的生长监控,并于试验结束时随机抽取30只(公鸡10只,母鸡20只)对其进行体重、肉用性能和肉品质等指标的测定.结果表明:五华三黄鸡有2个生长高峰期,第一个高峰在14～28日龄之间,第二个高峰在90～150日龄之间;公鸡的屠宰率为89.93%,母鸡为92.76%,全净膛率公鸡为64.13%,母鸡为60.44%,半净膛率公鸡为76.37%,母鸡为71.91%.胸肌、腿肌粗蛋白含量分别为公鸡22.23%、20.12%,母鸡22.53%、20.90%,差异均达到显著水平(P<0.05);胸肌、腿肌粗脂肪含量分别为公鸡1.49%、2.84%,母鸡1.60%、2.68%,差异极显著(P<0.01);胸、腿肌粗灰分含量分别为公鸡为1.47%、1.52%,母鸡1.51%、1.51%,差异不显著(P>0.05).此外还测定了肉色、肌肉含水量、不同时间的pH值以及心脏、肝脏和肌胃的粗蛋白、粗脂肪含量.

Influence of Mountain Free-range on Meat Performance and Meat Quality of Wuhua Three-yellow Chicken

The aim of this research was to investigate the influence of mountain free - range on meat performance and meat quality of Wuhua Three - yellow Chicken （ WTC）. Growth of the body of 100 WTCs was recorded from one to 210 day of age, and then thirty mountain free - ranging chickens （both cocks and hens） of 210 d of age were selected randomly to measure the body weight, meat performance and meat quality. There were two growth spurts, one was from fourteen to twenty - eight days, and another was from 60 to 150 days. The percentage of slaughter, dressed weight and eviscerate yield of cock and hen were 89.93%, 64.13%, 76.37% and 92.76%, 60.44%, 71.91%, respectively. There were significant differences in crude protein （22.23% ,20.12% vs. 22. 53% ,20.90%, P 〈 0.05）, or crude fat （ 1.49% ,2.84% vs. 1.60% ,2.68%, P 〈 0.01 ） of breast and thigh muscle between cock and hen ; whereas no significant difference （ 1.47 %, 1.52% vs. 1.51%, 1.51%, P 〉 0.05 ） in crude ash of both sexes was found. Meat color, water content of muscle, meat pH in different time, percentage of crude protein and crude fat in heart, liver and masticatory stomach were also measured in this study.