山药多糖对布拉特马伊鲃（LucioBarbus capito）生长性能、免疫力和肠道微生物群落的影响

IF 2.5 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Feed Science and Technology Pub Date : 2024-10-28 DOI:10.1016/j.anifeedsci.2024.116140

Liang Luo , Xianwei Meng , Shihui Wang , Rui Zhang , Kun Guo , Gaochao Wang , Wei Wang , Zhigang Zhao

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引用次数: 0

摘要

山药多糖可用作水产养殖中的免疫增强剂；然而，在饲料中添加山药多糖对鲃鱼（LucioBarbus capito）的保护机制仍不清楚。本研究旨在探讨在饲料中添加山药多糖（YP）8 周后对布拉特马伊鲃的生长性能、抗氧化能力、基因表达和肠道菌群的影响。实验组饲粮中分别添加了 0.1%、0.2%、0.4% 和 0.8%的山药多糖，而对照组饲粮中未添加山药多糖，每组三个重复。结果表明，添加 YP 能显著提高布氏鲃的增重率和特定生长率，且显著高于对照组（P < 0.05）。0.4 % YP（279.77 ± 17.43 g）实验组的生长效果明显优于其他实验组，饲料系数（49.35 ± 4.67 g）明显低于对照组（P <0.05）。添加 YP 能明显改善肝脏的免疫活性和抗氧化能力；在 0.40 % YP 组中，HSP70 表达降低，AKP 和 SOD 表达水平明显提高（P < 0.05）。此外，与对照组相比，实验组肠道细菌的相对丰度在镰刀菌属和固着菌属中有所增加，但在变形菌属中有所减少。在菌属水平上，鲸杆菌是优势菌。随着 YP 浓度的增加，鲸杆菌的相对丰度上升，而假单胞菌和呼吸杆菌的相对丰度下降。总之，日粮中添加0.4%的YP能显著改善布拉迈大马哈鱼的生长性能、抗氧化能力和基因表达，并调节肠道微生物多样性和菌群结构。

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Yam (Rhizoma Dioscoreae) polysaccharide affects growth performance, immunity, and intestinal microbial community in Bulatmai barbel (LucioBarbus capito)

Polysaccharides from yam (Rhizoma Dioscoreae) can be used as immunopotentiators in aquaculture; however, the protective mechanism of adding them to feed for Bulatmai barbel (LucioBarbus capito) remains unclear. This study aimed to investigate the effects of adding yam polysaccharide (YP) to feed for 8 weeks on the growth performance, antioxidant capacity, gene expression, and intestinal flora of the Bulatmai barbel. The experimental groups were fed a diet including 0.1 %, 0.2 %, 0.4 %, and 0.8 % YP, whereas the diet of the control group contained no added YP, with three replicates per group. The results showed that the addition of YP significantly increased the weight gain rate and specific growth rate of the Bulatmai barbel, which were significantly higher than those of the control group (P < 0.05). The growth effect of the 0.4 % YP (279.77 ± 17.43 g) experimental group was significantly better than that of the other experimental groups, and the feed coefficient (49.35 ± 4.67 g) was significantly lower than that of the control group (P < 0.05). The addition of YP significantly improved immune activity and antioxidant capacity of the liver; HSP70 expression decreased and AKP and SOD expression levels significantly increased in the 0.40 % YP group (P < 0.05). In addition, the relative abundance of intestinal bacteria increased for Fusobacteriota and Firmicutes but decreased in Proteobacteria in the experimental groups compared with the control group. At the genus level, Cetobacterium was the dominant bacterium. With an increase in YP concentration, the relative abundance of Cetobacterium increased, whereas that of Pseudomonas and Phreatobacter decreased. In conclusion, dietary supplementation with 0.4 % YP significantly improved growth performance, antioxidant capacity, and gene expression; and regulated intestinal microbial diversity and floral structure in the Bulatmai barbel.

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来源期刊

Animal Feed Science and Technology 农林科学-奶制品与动物科学

CiteScore

6.00

自引率

6.20%

发文量

266

审稿时长

3 months

期刊介绍： Animal Feed Science and Technology is a unique journal publishing scientific papers of international interest focusing on animal feeds and their feeding. Papers describing research on feed for ruminants and non-ruminants, including poultry, horses, companion animals and aquatic animals, are welcome. The journal covers the following areas: Nutritive value of feeds (e.g., assessment, improvement) Methods of conserving and processing feeds that affect their nutritional value Agronomic and climatic factors influencing the nutritive value of feeds Utilization of feeds and the improvement of such Metabolic, production, reproduction and health responses, as well as potential environmental impacts, of diet inputs and feed technologies (e.g., feeds, feed additives, feed components, mycotoxins) Mathematical models relating directly to animal-feed interactions Analytical and experimental methods for feed evaluation Environmental impacts of feed technologies in animal production.