Corn bran (CB) has been used as an ingredient for pigs, but the underlying mechanisms that improve gut health is less clear. This study was conducted to investigate effects of dietary CB on growth performance, nutrient digestibility, plasma indices related to gut hormones and immunity, gut microbiota composition, and fermentation products in weaned pigs. A total of 60 weaned pigs were allocated to two dietary treatments, and piglets in each group received control (CON) diet or 5% CB diet for 28 days. Growth performance, nutrient digestibility, indices of gut hormones and immunity in plasma were evaluated. Microbiota composition in feces was determined using 16S rRNA amplicon sequencing, and fermentation products were measured by high-performance ion chromatography. The results showed that dietary CB did not affect growth performance, nutrient digestibility, gut hormones, or fermentation products in the trial (P > 0.05). There was an increased response to CB inclusion on interleukin-10 production (P < 0.05). On day 28, piglets fed dietary CB had a higher shannon index (P < 0.05). The population of the Firmicutes in CB treatment were decreased (P < 0.05), while the percentage of the Bacteroidetes were increased (P < 0.05). In particular, the populations of Eubacterium corprostanoligenes, Pevotella, and Fibrobacter related to polysaccharide fermentation of cereal bran were increased (P < 0.05). In conclusion, a post-weaning diet containing 5% CB increased intestinal microbial diversity, especially higher richness of fibrolytic bacteria, and promoted anti-inflammatory response to some extent in piglets, these changes should facilitate the adaptation of the digestive system of piglets in the subsequent growing phases.
Bibliographical noteFunding Information:
We thank Dr. Xiangli Sun, Wenjun Yang, Zhixiang Sun, and Yao Li in Ministry of Agriculture Feed Industry Center, China Agricultural University, for the excellent assistance in chemical analysis. This work was supported by grants from the National Key R&D Program of China (Grant Nos. 2018YFD0500601 and 2017YFD0500501), the National Natural Science Foundation of China (Grant Nos. 31722054, 31472101, and 31829004), College of Animal Science and Technology "Young Talents Program" in China Agricultural University (Grant No. 2017DKA001), the 111 Project (Grant No. B16044), the China Postdoctoral Science Foundation (Grant No. 2017M610132), the Beijing Nova Program Interdisciplinary Cooperation Project (Grant No. xxjc201804), and the developmental fund for animal science by Shenzhen Jinxinnong Feed Co., Ltd.
© 2018 Liu, Zhao, Wang, Guo, Lu, Wang, Liu, Johnston, Zhao, Wu, Xu, Zhang and Ma.
- Corn bran
- Fibrolytic bacteria
- Short-chain fatty acids
- Weaned pigs
PubMed: MeSH publication types
- Journal Article