文献类型：期刊文献

英文题名：Effects of Graded Levels of Betaine Supplementation on Growth Performance and Intestinal Morphology in Indigenous Young Yellow Feather Broilers

作者：Sun, Chen-Yu[1];Liu, Wen-Chao[1];Xiao, Mei[1];Zhao, Zhi-Hui[1];An, Li-Long[1]

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

年份：2019

卷号：51

期号：6

起止页码：2323

外文期刊名：PAKISTAN JOURNAL OF ZOOLOGY

收录：SCI-EXPANDED(收录号：WOS:000490942900039)、、Scopus(收录号：2-s2.0-85072804294)、WOS

基金：This research was funded by the Talent Research Start-up Project of Guangdong Ocean University (R18007); Innovative Strong School Engineering Youth Talent Project (2017KQNCX090) and Key Platform Projects: Innovative Platform for Efficient Use of Animal Genetic Resources in the Tropics and Healthy Farming (2018302) by Department of Education in Guangdong Province; and Natural Science Foundation of Guangdong Province (2018A030307023).

语种：英文

外文关键词：Betaine; Growth promoter; Huaixiang chickens; Indigenous young broilers; Intestinal morphology

外文摘要：This 28-d feeding trial was conducted to evaluate the effects of dietary supplementation with different levels of betaine on growth performance and intestinal morphology in Chinese indigenous young yellow feather broilers. A total of 360 male, one-d-old Huaixiang chickens with an average initial BW of 44.52 +/- 1.07 g were randomly allotted to 4 treatments. Each dietary treatment consisted of 6 replicate cages, with 15 birds per replicate. The 4 dietary treatments were corn-soybean meal-based diets and supplemented with 0, 500, 1000 and 2000 mg/kg betaine, respectively. During d 1-14, with increasing the dietary betaine levels from 0 to 2000 mg/kg, the BWG was improved (quadratic, P<0.05), whereas the FCR was decreased (linear, P<0.01). During d 14-28, dietary supplementation of graded level of betaine had no significant effects on BWG, feed intake and FCR (P>0.05). Overall (d 1-28), there was a quadratic increase in BWG (P<0.05) and a linear decrease in FCR (P<0.01) with increasing betaine supplementation. In addition, dietary supplementation with different levels of betaine increased the villus width (linear, P<0.05), serosal layer thickness, muscular thickness, and wall thickness of duodenum (quadratic, P<0.05), and the serosal layer thickness and wall thickness of jejunum were also improved by inclusion of different level of betaine (cubic, P<0.05). Moreover, dietary supplementation of betaine increased the length of ileum (quadratic, P<0.05). In conclusion, the betaine could be used as growth promoter for Chinese indigenous young yellow feather broilers (Huaixiang chickens), and the betaine also exerted positive effects on intestinal morphology. The suitable recommended supplemental amount is 500 mg/kg.