Zhang Yun-Sheng, Xu Ya-Xi, Fan Wen-Lei, Zhou Zheng-Kui, Zhang Zhi-Ying, Hou Shui-Sheng
College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China.
Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
J Poult Sci. 2019 Jan 25;56(1):27-31. doi: 10.2141/jpsa.0180008.
Improving feed efficiency is important for decreasing feed cost in poultry production, because feed account for approximately 70% of the total production costs. The selection of feed efficiency may affect other important economic traits. Therefore, the objectives of this present study was to evaluate the relationships of the residual feed intake (RFI) with live body weight, carcass weight, carcass composition, and size of small intestines in a population of F Pekin ducks. Nine-hundred and eighty F ducks were derived from a cross between 40 Pekin ducks and 10 Mallard ducks. The results showed no significant correlation of RFI with live body weight and eviscerated carcass weight. RFI had negative effects on breast meat weight and gizzard weight. A positive correlation of RFI with abdominal fat weight, skin weight, and jejunum length was detected. Our results indicated that the selection of RFI could improve the feed efficiency of ducks without affecting their carcass compositions.
提高饲料效率对于降低家禽生产中的饲料成本很重要，因为饲料约占总生产成本的70%。选择饲料效率可能会影响其他重要的经济性状。因此，本研究的目的是评估F北京鸭群体中剩余采食量（RFI）与活体体重、胴体重、胴体组成和小肠大小之间的关系。980只F鸭来自40只北京鸭和10只绿头鸭的杂交后代。结果表明，RFI与活体体重和去内脏胴体重无显著相关性。RFI对胸肉重和砂囊重有负面影响。检测到RFI与腹脂重、皮重和空肠长度呈正相关。我们的结果表明，选择RFI可以提高鸭的饲料效率，而不影响其胴体组成。
