Effects of Bacillus pumilus(GXUN613L)on growth,serum biochemical indexes,antioxidant capacity,and intestinal health of coho salmon(Oncorhynchus kisutch W.)
The purpose of this experiment was to investigate the effects of Bacillus pumilus(GXUN613L)on the growth performance,serum biochemical indexes,antioxidant capacity,and intestinal health of coho salmon.A total of 240 coho salmon with initial body mass of(130.2+10.1)g were randomly divided into four groups with three replicates in each group and 20 coho salmon in each replicate.Bacillus pumilus(GXUN613L)was supplemented with 0,2 × 107,4 × 109,and 8 × 1011CFU/g in basal diet in CK group,LL group,LM group,and LH group,respectively.The trial period was six weeks.The results showed that the weight gain rate and specific growth rate of coho salmon in LL group and LM group were significantly higher than those in CK group(P＜0.05),the protein efficiency ratio of coho salmon in LM group was significantly higher than that in CK group(P＜0.05),and the feed conversion ratio was significantly lower than that in CK group(P＜0.05).Serum total protein,albumin and total cholesterol in LL group,LM group,and LH group were significantly higher than those in CK group(P＜0.05).Serum glucose content and alkaline phosphatase activity in LM group were significantly higher than those in CK group(P＜0.05).The total antioxidant capacity,catalase activity,superoxide dismutase,and glutathione peroxidase activity of liver in LM group were significantly higher than those in CK group(P＜0.05).The muscular layer thickness and villus height of foregut and hindgut in LM group were significantly higher than those in CK group(P＜0.05),and the intestinal microbial diversity was better.The result shows that the addition of Bacillus pumilus(GXUN613 L)in feed can promote the growth,improve the serum indexes and intestinal health,and enhance the antioxidant capacity of coho salmon.The suitable addition amount of GXUN613L is 4 × 109 CFU/g.
Bacillus pumiluscoho salmongrowth performanceserum biochemical indexesantioxidant capacityintestinal health
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