溧阳鸡生长曲线、屠宰性能及肉品质分析

Abstract

Abstract: 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 (P >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 (P <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 (P <0.05); the sheer force of 12-week-old cock's leg muscle was significantly higher than that of hens (P <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 development value.

Key words: Liyang chicken, Slaughter performance, Slaughtering rate, Meat quality, pH

Feng Min, Jin Zidi, Liu Xikui, Xu Shangli, Liu Long, Gong Daoqing. Study on the Slaughtering Traits and Meat Quality of Liyang Chicken[J].The Chinese Livestock and Poultry Breeding, 2023, 19(8): 13-20.

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Study on the Slaughtering Traits and Meat Quality of Liyang Chicken

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