Dietary mannan oligosaccharide improves growth performance, muscle oxidative status, and meat quality in broilers under cyclic heat stress
Dietary mannan oligosaccharide improves growth performance, muscle oxidative status, and meat quality in broilers under cyclic heat stress
复制标题
DOI：
10.1016/j.jtherbio.2018.06.002
复制
发表时间：
2018-07-01
影响因子：
2.7
通讯作者：
Zhou, Yanmin
中科院分区：
文献类型：
--
作者：
Cheng, Yefei;Du, Mingfang;Zhou, Yanmin
本研究调查了日粮中添加甘露寡糖（MOS）对暴露于周期性热应激（HS）的肉鸡生长性能、血清皮质酮水平、抗氧化能力、肉质以及胸肌化学成分的影响。将 144 只一日龄雄性肉鸡 (Arbor Acres plus) 随机分配至 3 个处理，每个处理 6 个重复。对照组和HS组饲喂基础日粮，MOS组在基础日粮中添加1 g/kg MOS，分别饲喂42天。所有肉鸡的前3天温度保持在32-33℃，对照组每周逐渐降低3℃，最终温度为20℃，而HS组和MOS组的温度在8小时内保持不变，并在剩余的16小时内每天降低到与对照组相同的水平。与对照组相比，循环HS导致生长性能迟缓和血清皮质酮水平升高（P < 0.05）。补充 MOS 可以促进循环 HS 肉鸡的生长性能并降低血清皮质酮浓度（P < 0.05）。循环HS增加了胸肌的滴水损失（48 h）、蒸煮损失、丙二醛积累和水分含量，而降低了pH（24 h）值、谷胱甘肽过氧化物酶（GSH-Px）活性和粗蛋白含量（P < 0.05）。相反，与HS组相比，膳食添加MOS可减少滴水损失（48小时）和丙二醛浓度，并增加胸肌中的GSH-Px活性（P < 0.05）。结果表明，日粮中添加 MOS 可以改善循环 HS 下肉鸡的生长性能、胸肌氧化状态和肉品质。
This study investigated the effects of dietary mannan oligosaccharide (MOS) supplementation on growth performance, serum corticosterone level, and antioxidant ability, meat quality as well as chemical composition of breast muscle in broilers exposed to cyclic heat stress (HS). 144 one-day-old male broiler chicks (Arbor Acres plus) were randomly allocated to 3 treatments with 6 replicates each. Broilers in the control and HS groups were fed a basal diet, and in the MOS group were given the basal diet supplemented with 1 g/kg MOS for 42 days, respectively. The temperature was maintained 32-33 degrees C for the first 3 days for all broilers, and it was gradually reduced by 3 degrees C per week to a final temperature of 20 degrees C in the control group, whereas it remained unchanged for 8 h and reduced to the same level to the control group for the remaining 16 h daily in the both HS and MOS groups. Compared with the control group, cyclic HS resulted in retarded growth performance and increased serum corticosterone level (P < 0.05). The supplementation of MOS promoted growth performance and reduced serum corticosterone concentration in broilers subjected to cyclic HS (P < 0.05). Cyclic HS increased drip loss(48 h), cooking loss, malondialdehyde accumulation, and moisture content, whereas decreased pH(24 h) value, glutathione peroxidase (GSH-Px) activity, and crude protein content in the breast muscle (P < 0.05). In contrast, dietary MOS supplementation reduced drip loss(48 h), and malondialdehyde concentration, and increased GSH-Px activity in breast muscle compared with the HS group (P < 0.05). The results indicated that dietary MOS supplementation could improve growth performance, and oxidative status and meat quality of breast muscle in broilers under cyclic HS.