Sources of Dietary Fiber Affect the SCFA Production and Absorption in the Hindgut of Growing Pigs

Frontiers in Nutrition

Nutrition

Zhenyu Wang¹  Dandan Han¹  Jinbiao Zhao¹  Shuai Zhang¹  Yu Bai¹  Xingjian Zhou¹  Hao Ye¹  Junjun Wang¹  Dongsheng Che²  Yu Pi³ 

[1] State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China;State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China;College of Animal Science and Technology, Jilin Agricultural University, Changchun, China;State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China;State Key Laboratory of Biological Feed, Ministry of Agriculture and Rural Affairs, Boen Biotechnology Co. Ltd., Ganzhou, China;

关键词: fiber sources;    in vivo-vitro;    SCFA production and absorption;    hindgut fermentation;    growing pigs;   

DOI  :  10.3389/fnut.2021.719935

 received in 2021-06-03, accepted in 2021-12-09,  发布年份 2022

来源: Frontiers

【 摘 要 】

Effects of different dietary fiber (DF) sources on short-chain fatty acids (SCFA) production and absorption in the hindgut of growing pigs were studied by an in vivo–vitro (ileal cannulated pigs and fecal inoculum-based fermentation) method. Thirty-six cannulated pigs (body weight: 48.5 ± 2.1 kg) were randomly allocated to 6 treatments containing the same DF content (16.5%), with either wheat bran (WB), corn bran (CB), sugar beet pulp (SBP), oat bran (OB), soybean hulls (SH), or rice bran (RB) as DF sources. Pigs were allowed 15 days for diet adaptation, and then, fresh ileal digesta and feces were collected to determine SCFA concentration which was normalized for food dry matter intake (DMI) and the hindgut DF fermentability. Fecal microbiota was inoculated into the freeze-dried ileal digesta samples to predict the ability of SCFA production and absorption in the hindgut by in vitro fermentation. The SH group had the largest concentration of total SCFA and propionate in ileal digesta and fecal samples of growing pigs (p < 0.05). Nonetheless, the predicted acetate, total SCFA production, absorption in the SBP group were the highest (p < 0.01), but the lowest in the OB group (p < 0.01) among all groups. Even SBP and OB group had a similar ratio of soluble DF (SDF) to insoluble DF (IDF). The CB group had high determined ileal and fecal butyrate concentration but the lowest butyrate production and absorption in the hindgut (p < 0.01). Overall, the source of DF had a great impact on the hindgut SCFA production and absorption, and SBP fiber had a great potential to increase hindgut SCFA production and absorption.

【 授权许可】

Unknown   
Copyright © 2022 Bai, Zhou, Zhao, Wang, Ye, Pi, Che, Han, Zhang and Wang.