摘要
为了评价溧阳鸡的肉用性能,该试验测定了12周龄溧阳鸡的生长曲线、屠宰性能和肉品质。结果表明:0~12周龄溧阳鸡公鸡体重始终高于母鸡,Bertalanffy模型能较好地拟合这个阶段溧阳鸡的体重增长曲线;12周龄公母鸡屠宰率分别为91.36%和90.44%,全净膛率分别为66.83%和66.44%,半净膛率分别为82.18%和81.17%,胸肌率分别为15.32%和15.00%、腿肌率分别为20.06%和18.72%、腹脂率分别为2.13%和3.29%,这些性状公母之间差异不显著(P>0.05)。活重、半净膛重、全净膛重、胸肌重以及腿肌重均呈极显著正相关(P<0.01);全净膛重和半净膛率,胸肌重和半净膛率、腿肌率,腿肌重和胸肌率呈显著正相关(P<0.05);12周龄公鸡腿肌的剪切力显著高于母鸡(P<0.05),而其余肉品质指标不存在显著性差异。而腿肌和胸肌相比,腿肌肉色的红度(a值)略高于胸肌;公母鸡腿肌的pH分别为6.30和6.31,均高于胸肌的5.90和5.84;在剪切力上腿肌也高于胸肌。肌肉脂肪酸和蛋白质含量测定结果显示,溧阳鸡胸肌的不饱和脂肪酸含量较高(公鸡58.91%,母鸡62.79%),胸肌蛋白质含量高于腿肌。可见,溧阳鸡生产性能较好,具有较高的开发价值。
In order to evaluate the meat performance of Liyang chicken,the slaughtering performance and meat quality of 12-week-old Liyang chicken were measured.The results showed that The body weight of 0~12 week old Liyang cockerels is always higher than that of hens,and the Bertalanffy model fits the body weight growth curve of Liyang chickens at this stage better;the slaughtering rates of 12-week-old male and female chickens were 91.36%and 90.44%,the whole net carcass rate was 66.83%and 66.44%,the half net carcass rate was 82.18%and 81.17%,and the breast muscle rate was 15.32%and 15.00%,leg muscle rate was 20.06%and 18.72%,abdominal fat rate was 2.13%and 3.29%,respectively.The difference between male and female was not significant(>0.05)in these characters.Live weight,whole net carcass weight,half net carcass weight,breast muscle weight,and leg muscle weight were all significantly positively correlated with each other(<0.01);There was a significant positive correlation between whole net carcass weight and half net carcass rate,between breast muscle weight,half net carcass rate and leg muscle rate,and between leg muscle weight and breast muscle rate(<0.05);the sheer force of 12-week-old cock's leg muscle was significantly higher than that of hens(<0.05),while there is no significant difference in other meat quality indexes.Compared with the breast muscles,the redness(a value)of the leg muscle color was slightly higher than that of the breast muscles;the pH of the male and female leg muscles are 6.30 and 6.31,respectively,which are higher than 5.90 and 5.84 of the breast muscle;in terms of shear force,the leg muscles were also higher than the breast muscles.The results of muscle fatty acid and protein content determination showed that the pectoral muscle of Liyang chicken had high unsaturated fatty acid content(58.91%in male and 62.79%in female),and the protein content of pectoral muscle was higher than that of leg muscle.The results indicate that the production performance effect of Liyang chicken is good and has certain
作者
冯敏
金子笛
刘喜魁
徐尚立
刘龙
龚道清
Feng Min;Jin Zidi;Liu Xikui;Xu Shangli;Liu Long;Gong Daoqing(Liyang Breeding Stock Farm,Liyang,213363,Jiangsu;College of Animal Science and Technology,Yangzhou University,Yangzhou,225000,Jiangsu)
出处
《中国畜禽种业》
2023年第8期13-20,共8页
The Chinese Livestock and Poultry Breeding
基金
江苏省农业重大新品种创制项目(PZCZ201731)。
关键词
溧阳鸡
屠宰性能
屠宰率
肉品质
PH
Liyang chicken
Slaughter performance
Slaughtering rate
Meat quality
pH
