Peebles E D, Doyle S M, Pansky T, Gerard P D, Latour M A, Boyle C R, Smith T W
Department of Poultry Science, Mississippi State University, Mississippi State 39762, USA.
Poult Sci. 1999 Apr;78(4):512-5. doi: 10.1093/ps/78.4.512.
The effects of breeder age (35, 51, and 63 wk) and added dietary fat on subsequent broiler slaughter yield were evaluated. Beginning at 22 wk of age, diets included 0, 1.5, or 3.0% added poultry fat (PF), 1.5 or 3.0% added corn oil (CO), or 3.0% added lard (LA). Slaughter yields were greatest in broilers from 63-wk-old breeders. Added CO in broiler breeder diets significantly increased subsequent 43-d live BW and chilled carcass yields compared to LA. Furthermore, CO diets significantly increased relative front-half yields compared to PF diets; and compared to the 3.0% fat level, 1.5% added fat significantly increased 43-d live BW, regardless of fat type. In conclusion, breeder age influenced broiler slaughter yield, and fat added at the 1.5% level to breeder hen diets was an effective energy source. However, less saturated fat improved subsequent slaughter yield.
评估了种鸡年龄（35、51和63周龄）以及日粮中添加脂肪对后续肉鸡屠宰产量的影响。从22周龄开始，日粮中添加0%、1.5%或3.0%的家禽脂肪（PF）、1.5%或3.0%的玉米油（CO）或3.0%的猪油（LA）。来自63周龄种鸡的肉鸡屠宰产量最高。与添加猪油相比，在种鸡日粮中添加玉米油显著提高了后续43日龄的活体重和冷却胴体产量。此外，与添加家禽脂肪的日粮相比，添加玉米油的日粮显著提高了相对前半部分产量；与3.0%的脂肪水平相比，添加1.5%的脂肪显著提高了43日龄的活体重，无论脂肪类型如何。总之，种鸡年龄影响肉鸡屠宰产量，在种母鸡日粮中添加1.5%水平的脂肪是一种有效的能量来源。然而，较少的饱和脂肪可提高后续屠宰产量。
