期刊
AQUACULTURE NUTRITION
卷 26, 期 2, 页码 590-600出版社
WILEY-HINDAWI
DOI: 10.1111/anu.13020
关键词
feed utilization; growth performance; intestinal histology; largemouth bass; synbiotics
类别
资金
- Shanghai Qingjue International Trade Co., Ltd. [D-800618]
- Research and Supporting Platform of Efficient Aquaculture [A1-3201-19-3003]
This study investigated the effect of dietary synbiotics on the growth, feed utilization and intestinal histology of largemouth bass (Micropterus salmoides). A commercial synbiotic product containing dried powder of yeast, Bacillus subtilis and mannan oligosaccharides was supplemented in basal diet with 0 g/kg (control), 1.0, 2.0, 4.0 and 6.0 g/kg, respectively, and then, the five diets were fed to largemouth bass with body weight of 4.5 +/- 0.1 g for 8 weeks. The results showed that the supplementation of 2.0, 4.0 and 6.0 g/kg synbiotics increased weight gain by 20.6%, 17.7% and 11.8% (p < .05) and decreased feed conversion ratio by 0.20, 0.18 and 0.12 (p < .05), respectively, when compared to the control. The protein retention, lipid retention, apparent digestibility coefficient of dry matter and crude protein, and the intestinal villus height and width of 2.0 and 4.0 g/kg synbiotic groups were significantly higher than those of the control (p < .05). The intestinal protease activity and serum lysozyme activity were increased by the addition of 2.0 and 4.0 g/kg synbiotics (p < .05). In conclusion, dietary synbiotics improved the growth, feed utilization and intestinal structure of juvenile largemouth bass, and the recommended inclusion level was 2.0-4.0 g/kg.
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