Time-course effects of different fiber-rich ingredients on energy values, microbiota composition and SCFA profile in growing pigs

文献类型： 外文期刊

第一作者： Gao, Qingtao

作者： Gao, Qingtao;Liu, Zhengqun;Li, Kai;Bai, Guosong;Liu, Lei;Zhong, Ruqing;Chen, Liang;Zhang, Hongfu;Liu, Zhengqun

作者机构：

关键词： Adaptation time; Energy value; Fecal microbiota; Fiber -rich ingredient; Growing pig

期刊名称：ANIMAL NUTRITION （ 影响因子：6.3； 五年影响因子：6.9 ）

ISSN： 2405-6383

年卷期： 2023 年 12 卷

页码：

收录情况： SCI

摘要： This study was to investigate time-course effects of different types of dietary fiber on the energy values, fecal microbiota and short-chain fatty acid (SCFA) concentration in growing pigs. A total of 24 barrows (initial body weight, 19.8 +/- 0.5 kg) were assigned to 4 dietary treatments based on body weight (BW) in a completely randomized design, including a basal diet (CON) and 3 fiber-rich diets replacing corn, soy-bean meal and soybean oil in the CON diet with 20% sugar beet pulp (SBP), defatted rice bran (DFRB) or soybean hull (SBH), respectively. Fresh feces were sampled on d 7,14 and 21, followed by 5 d total feces and urine collections. The results showed that there were no differences in DE and ME between any of the fiber ingredients on d 7, 14 or 21. However, fiber inclusion decreased the DE and ME of the diet (P < 0.05) regardless of the time effect. Principal coordinate analysis (PCoA) revealed distinctly different microbial communities on the DFRB diet and SBH diet across different times (P < 0.05) and the fecal microbiota of the 4 diet groups demonstrated notably distinct clusters at each time point (P < 0.05). With adaptation time increased from 7 to 21 d, cellulose-degrading bacteria and SCFA-producing bacteria (e.g., Ruminococcaceae_UCG-014, Rikenellaceae_RC9_gut_group and Bifidobacterium) increased in the fiber in-clusion diets, and pathogenic genera (e.g., Streptococcus and Selenomonas) were increased in the basal diet (P < 0.05). Furthermore, the gut microbiota of growing pigs adapted more easily and quickly to the SBP diet compared to the DFRB diet, as reflected by the concentration of propionate, butyrate, isovalerate and total SCFA which increased with time for growing pigs fed the DFRB diet (P < 0.05). Collectively, our results indicated at least 7 d adaptation was required to evaluate the energy values of fiber-rich in-gredients, as the hindgut microbiota of growing pigs may need more time to adapt to a high fiber diet, especially for insoluble dietary fiber.(c) 2023 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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