Waldroup Park, Vaughn Mathew, McNaughton James
Poultry Science Department, University of Arkansas, Fayetteville, AR 72701, USA.
Puretein Bioscience, Minneapolis, MN 55416, USA.
Animals (Basel). 2021 Jun 11;11(6):1751. doi: 10.3390/ani11061751.
The post-hatch period of a broiler is an integral point in their development and for the programming of musculoskeletal and immune cells. Therefore, the efficacy of two bioactive protein products, betaGRO (BG) and celluTEIN (CT) to impact post-hatch and lifelong development was evaluated. Birds were grown under a low stress environment using clean wood shavings litter and a high stress environment with used litter from a commercial farm that had suffered high mortality. Each additive was fed at 300 g/ton from day 1-14 and 50 g/ton from day 15-42. Growing birds in the high stress environment had a negative impact on performance ( < 0.05); however, addition of either BG or CT successfully mitigated the detriments of the high stress environment ( < 0.05), and in many cases, the performance was equal to or better than the performance of birds on the control diet in the low stress environment. Birds fed BG and CT experienced improvements in 42-day feed conversion, and were more uniform than birds grown consuming the control diet ( < 0.05). Mortality of birds in the high stress environment was reduced by addition of BG or CT ( < 0.05). Addition of BG and CT resulted in improvements in carcass and breast meat yield ( < 0.05). Together, these data suggest that BG and CT can be used interchangeably to improve broiler health and performance.
肉鸡出壳后的阶段是其生长发育以及肌肉骨骼和免疫细胞编程的关键时期。因此，评估了两种生物活性蛋白产品betaGRO（BG）和celluTEIN（CT）对出壳后及终身发育的影响。鸡只分别饲养在使用干净木屑垫料的低应激环境和使用商业农场高死亡率鸡舍用过的垫料的高应激环境中。每种添加剂在第1至14天以300克/吨的量投喂，第15至42天以50克/吨的量投喂。处于高应激环境中的生长鸡性能受到负面影响（P<0.05）；然而，添加BG或CT成功减轻了高应激环境的不利影响（P<0.05），并且在许多情况下，性能等同于或优于低应激环境中采食对照日粮的鸡只。采食BG和CT的鸡在42日龄时饲料转化率提高，且比采食对照日粮的鸡只更均匀（P<0.05）。添加BG或CT降低了高应激环境中鸡只的死亡率（P<0.05）。添加BG和CT提高了胴体和胸肉产量（P<0.05）。总之，这些数据表明BG和CT可以互换使用以改善肉鸡健康和性能。
