1Institute of Animal Science,Chinese Academy of Agricultural Sciences,Beijing 100193,China.
2Feed Research Institute,Chinese Academy of Agricultural Sciences,Beijing 100081,China.
Animal. 2016 Sep;10(9):1417-22. doi: 10.1017/S175173111600032X. Epub 2016 Mar 7.
In order to avoid excess feed consumption during the force-feeding period in foie gras production, a dose-response experiment with seven feed consumption levels (450, 540, 630, 720, 810, 900, 990 g/day per bird) was conducted to evaluate the effects of feed consumption levels on growth performance and carcass composition of male Mule ducks from 91 to 102 days of age. One-day-old Mule ducklings (sterile and artificial hybrid of male Albatre Muscovy duck and female Pekin duck were fed a two-phase commercial diets for ad libitum intake from hatching to 91 days of age, followed by graded feeding levels of a corn diet by force-feeding from 91 to 102 days of age. Fifty-six 91-day-old male Mule ducks with similar BW were randomly assigned to seven treatments, with eight birds per treatment. Birds were housed in individual pens. At 102 days of age, final BW was measured and BW gain and feed conversion ratio of ducks from each treatment were calculated from day 91 to 102, and then all ducks were slaughtered to evaluate the yields of skin with subcutaneous fat, abdominal fat, breast meat (including pectoralis major and pectoralis minor), leg meat (including thigh and drum stick), and liver. Significant differences in BW gain, total liver weight and liver relative weight were observed among the treatments (P<0.001). According to the broken-line regression analysis, the optimal feed consumption levels of male Mule ducks from 91 to 102 days of age for maximum BW gain, total liver weight and liver relative weight were 217, 227 and 216 g feed/kg BW0.75·per day, respectively.
为了避免鹅肝生产中强制填饲期的过度饲料消耗，进行了一项具有 7 个饲料消耗水平（每只鸟每天 450、540、630、720、810、900、990 g）的剂量反应试验，以评估饲料消耗水平对 91 至 102 日龄雄性骡鸭生长性能和胴体组成的影响。91 日龄雄性骡鸭（雄性阿尔卑斯麝香鸭和雌性北京鸭的无菌人工杂交种）在孵化至 91 日龄期间，自由采食两阶段商业日粮，然后在 91 至 102 日龄期间，通过强制填饲玉米日粮进行分级喂养。将 56 只具有相似 BW 的 91 日龄雄性骡鸭随机分为 7 个处理组，每个处理组 8 只。鸟类被安置在单独的笼子里。在 102 日龄时，测量最终 BW，并计算每只鸭子从第 91 天到第 102 天的 BW 增重和饲料转化率，然后所有鸭子都被屠宰，以评估皮与皮下脂肪、腹部脂肪、胸肉（包括胸大肌和胸小肌）、腿肉（包括大腿和鸡腿）和肝脏的产量。BW 增重、总肝重和肝相对重在处理之间存在显著差异（P<0.001）。根据折线回归分析，91 至 102 日龄雄性骡鸭获得最大 BW 增重、总肝重和肝相对重的最佳饲料消耗水平分别为 217、227 和 216 g 饲料/kg BW0.75·每天。
