文献类型：期刊文献

英文题名：Chitosan oligosaccharide as an effective feed additive to maintain growth performance, meat quality, muscle glycolytic metabolism, and oxidative status in yellow-feather broilers under heat stress

作者：Chang, Qingqing[1];Lu, Yiqi[1];Lan, Ruixia[1]

机构：[1]Guangdong Ocean Univ, Coll Coastal Agr Sci, Dept Anim Sci, Zhanjiang 524088, Guangdong, Peoples R China

年份：2020

卷号：99

期号：10

起止页码：4824

外文期刊名：POULTRY SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000580583200020)、、Scopus(收录号：2-s2.0-85089592684)、WOS

基金：Financial support provided by program for scientific research start-up funds of Guangdong Ocean University (101402/R18005) and Key Platform Project of Innovation strong school Engineering by Department of Education of Guangdong Province (2018302), is gratefully acknowledged.

语种：英文

外文关键词：chitosan oligosaccharide; heat stress; meat quality; muscle oxidative status; yellow-feather broiler

外文摘要：This study investigated the effects of dietary chitosan oligosaccharides (COS) supplementation on growth performance; corticosterone, growth hormone, and insulin-like growth factor-1 concentration; relative organ weight; liver function; meat quality; muscle glycolytic metabolism; and oxidative status in yellow-feather broilers under heat stress. A total of 108 35-day-old Chinese yellow-feather broilers (BW, 470.31 +/- 13.15 g) was randomly allocated to 3 dietary treatments as follow: control group, basal diet and raised under normal temperature (24 degrees C); HS group, basal diet and raised under cycle heat stress (34 degrees C from 10:00 to 18:00 and 24 degrees C for the rest time); and HSC group, basal diet with 200 mg/kg COS supplementation and raised under cycle heat stress. Each treatment had 6 replication pens and 6 broilers per pen. Results indicated that heat stress decreased ADG, ADFI, gain:feed ratio, the relative weight of thymus, bursa of Fabricius, pancreas, proventriculus, gizzard, and liver, growth hormone concentration, pH24h, muscle glycogen content, muscle superoxide dismutase and glutathione peroxidase activity, as well as increased corticosterone, alanine aminotransferase and aspartate aminotransferase level, cooking loss, muscle lactate and malondialdehyde content. Compared with the HS group, broilers in the HSC group had higher ADG, the relative weight of thymus, bursa of Fabricius, and liver, growth hormone concentration, pH24h, muscle glycogen content, muscle superoxide dismutase and glutathione peroxidase activity, and lower serum corticosterone, alanine aminotransferase and aspartate aminotransferase level, cooking loss, and muscle lactate and malondialdehyde content. In conclusion, the results suggested that COS could be used as an effective feed additive to maintain growth performance, liver function, meat quality, muscle glycolytic metabolism, and oxidative status of yellow-feather broilers under heat stress. The improved meat quality is possibly through reducing muscle glycolysis metabolism and improving muscle oxidative status by dietary COS supplementation in broilers under heat stress.