Abudabos Alaeldein M, Suliman Gamaleldin M, Al-Owaimer Abdullah N, Sulaiman Ali R Al, Alharthi Abdulrahman S
Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.
National Center for Environmental Technology, Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia.
Animals (Basel). 2021 Jun 27;11(7):1911. doi: 10.3390/ani11071911.
The effects of nano-emulsified vegetable oil (NEVO) and betaine (BET) supplements on growth performance and meat qualities of broilers reared under cyclic heat stress (HS) were investigated. Two hundred and eighty-eight mixed-sex broilers at 21 d were randomly distributed to a 2 × 3 factorial arrangement of treatments formed by two environmental temperatures (thermoneutral (TN; 24 ± 1 °C) and cyclic high-temperature (HT; 35 ± 1 °C)) and three dietary treatments (control (CON), NEVO, and BET). The cumulative performance (21-35 d) revealed a reduction in average daily gain (ADG) ( < 0.05) in the CON compared to NEVO. NEVO and BET groups had a better feed conversion ratio (FCR) and performance efficiency factor (PEF) compared with the CON ( < 0.001, < 0.01, respectively). The environmental temperature affected daily feed intake (DFI), ADG, FCR, and PEF. The addition of BET improved breast fillets yield, temperature, pH and pH ( < 0.05) in comparison with the CON. Moreover, the TN group had lower fillet temperature and higher pH compared to the HT. Moreover, HT increased shear force (SF), hardness, springiness, cohesiveness, and chewiness of the fillets compared to TN. In conclusion, dietary supplementation with BET and NEVO could effectively improve performance parameters and meat characteristics under HS conditions.
研究了纳米乳化植物油（NEVO）和甜菜碱（BET）添加剂对在周期性热应激（HS）条件下饲养的肉鸡生长性能和肉质的影响。288只21日龄的混合性别肉鸡被随机分配到由两种环境温度（热中性（TN；24±1°C）和周期性高温（HT；35±1°C））和三种日粮处理（对照组（CON）、NEVO和BET）组成的2×3析因试验设计中。累积性能（21至35日龄）显示，与NEVO相比，CON组的平均日增重（ADG）降低（P<0.05）。与CON组相比，NEVO和BET组的饲料转化率（FCR）和性能效率因子（PEF）更好（分别为P<0.001和P<0.01）。环境温度影响日采食量（DFI）、ADG、FCR和PEF。与CON组相比，添加BET提高了胸肉产量、温度、pH值和pH（P<0.05）。此外，TN组的胸肉温度低于HT组，pH值高于HT组。此外，与TN组相比，HT组增加了胸肉的剪切力（SF）、硬度、弹性、内聚性和咀嚼性。总之，在热应激条件下，日粮中添加BET和NEVO可以有效改善性能参数和肉品质。
