武禽10肉鸭与亲本连城白鸭生长曲线拟合及肉用性能比较

Comparison of growth curve fitting and meat performance between commercial duck of Wuqin 10 meat duck synthetic line and Liancheng white duck

为研究武禽10肉鸭配套系商品鸭生长发育规律,以亲本连城白鸭为对照,测定0~9周龄体重和9周龄屠宰指标、肉质指标,利用Logistic、Gompertz、Bertalanffy 3种非线性模型对体重进行生长曲线拟合。结果发现:(1)3种曲线模型对武禽10肉鸭配套系商品鸭和连城白鸭体重拟合效果均较好,拟合度均在0.98以上,其中武禽10肉鸭Gompertz模型拟合最佳(公鸭R^(2)=0.999,母鸭R^(2)=0.997),连城白鸭Bertalanffy模型拟合最佳(公鸭R^(2)=0.995,母鸭R^(2)=0.993);(2)武禽10肉鸭Gompertz模型拟合曲线中公、母鸭拐点体重分别为849.9、810.7 g,拐点周龄分别为3.9、4.1 w,最大周增重分别为294.9、268.3 g;连城白鸭Bertalanffy模型拟合曲线中公、母鸭拐点体重分别为528、601 g,拐点周龄分别为4.6、5.7 w,最大周增重分别为135、126 g;(3)屠宰结果显示,武禽10肉鸭较连城白鸭活体重提高80.90%,全净膛率提高2.97%,瘦肉率(胸肌率和腿肌率之和)提高20.31%(P<0.05);(4)肉质测定结果显示,武禽10肉鸭较连城白鸭胸肌蛋白质含量提高4.15%,肌内脂肪含量提高21.55%(P<0.05)。综合分析表明,武禽10肉鸭商品鸭早期生长速度快于连城白鸭,且9周龄产肉性能和肉品质均优于连城白鸭。该研究结论为验证武禽10肉鸭配套系的选育效果及商品鸭的饲养管理提供理论依据。

In order to study the growth and development law of the commercial duck of Wuqin 10 meat duck synthetic line,the body weight and slaughter index 0~9 weeks old were measured,the parent Liancheng white duck as control.Non-linear models including Logistic,Gompertz and Bertalanffy were applied to fit and analyze the growth curve of 0~9 weeks of age.The results showed that:(1)The growth curves could be fitted using the three models with fitting degrees above 0.98.Among them,the Gompertz model of the commercial duck was the best(male R^(2)=0.999,female R^(2)=0.997)and the Bertalanffy model of Liancheng white duck was the best(male R^(2)=0.995,female R^(2)=0.993);(2)In the fitting curve of the Gompertz model of the commercial duck,the growth inflection point was at 3.9 week of age for male ducks and 4.1 week of age for female ducks,the inflection body weight were 849.9 g and 810.7 g,maximum body weight gain per week were 294.9 g and 268.3 g respectively.In the fitting curve of the Bertalanffy model of Liancheng white duck,the growth inflection point was at 4.6 week of age for male ducks and 5.7 week of age for female ducks,the inflection body weight were 528 g and 601 g,maximum body weight gain per week were 135 g and 126 g respectively.(3)The slaughter results showed that the live weight of Wuqin 10 meat duck increased by 80.90%,the percentage of eviscerated yield increased by 2.97%,the percentage of lean meat yield increased by 20.31%(P<0.05),respectively,compared with Liancheng white duck.(4)The meat quality test results showed that the protein content of Wuqin 10 meat duck increased by 4.15%,the intramuscular fat content increased by 21.55%(P<0.05).The results of this study provide a theoretical basis for verifying the breeding effect of Wuqin 10 meat duck synthetic line and the feeding management of commercial ducks.