Effects of different probiotics on growth performance and biochemical indicators of Salmon trutta
[Objective]The present paper aimed to compare the effects of adding different probiotics in feed on the growth performance,diges-tive enzyme activity and serum biochemical indicators of Salmon trutta.[Method]630 S.trutta with an initial body weight of(84.57±1.83)g were selected for the experiment and randomly divided into 7 groups,with 3 parallel fish in each group and 30 parallel fish in each group.The control group was fed with basic feed,while the experimental group was supplemented with different probiotics(Saccharomyces,EM bacte-ria,Lactobacillus,Bacillus subtilis,compound Bacillus,B.licheniformis)to the basic feed for three months.[Result]The indicators related to growth,digestion and serum biochemistry were measured and analyzed.The results showed that adding different probiotics had a growth pro-moting effect on the S.trutta.The average body length growth rate,average body weight growth rate,specific growth rate,food conversion rate and feeding rate of the experimental group were significantly higher than those of the control group(P＜0.05,the same as below);Compared with the control group,the experimental group showed an increase in liver pancreatic protease,intestinal protease,lipase,and amylase,with the EM bacteria group having the highest level,significantly higher than the other experimental groups;The activity of catalase in serum of yeast was significantly increased compared to the control group,while there was no significant difference in total protein,triglycerides,glu-cose,superoxide dismutase,acid phosphatase,glutamic oxalate transaminase,glutamic pyruvate transaminase,complement C3 and lysozyme in-dicators(P＞0.05),while other bacteria had varying degrees of influence among the experimental groups.[Conclusion]Taking into account survival rate,growth characteristics,digestive enzymatic activity and serum biochemical indicators,the addition of EM bacteria has a good effect on the healthy breeding of S.trutta.
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