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The experiment was to investigate the effect of Clostridium butyricum instead of antibiotics on growth performance and serum biochemical indexes of rabbits. Fifty healthy male rabbits at 90 d of age were randomly divided into five groups, with ten replicates in each group and one rabbit in each replicate. Rabbits in test group â…  (control group) were fed with a basal diet, rabbits in group â…¡ (antibiotic group) were fed basal diet + aureomycin 100 mg/kg, and rabbits in group â…¢, group â…£ and group â…¤ were fed with basal diet supplemented with 100, 250 and 400 mg/kg Clostridium butyricum, respectively. The pre-test lasted for 7 d and the formal experiment lasted for 30 d. The results showed that the final weight of rabbits in group â…¢, group â…£ and group â…¤ were extremely significantly higher than that in control group, and the result in group â…¤ was extremely significantly higher than that in other groups (P<0.01), the average daily gain of rabbits in group â…£ and group â…¤ were extremely higher than those in group â…  and group â…¡ (P<0.01); the average daily feed intake of rabbits in group â…¢, group â…£ and group â…¤ were extremely significantly higher than that in control group (P<0.01);the feed to gain ratio of rabbits in group â…£ and group â…¤ were significantly lower than that in control group (P<0.05). Serum GLU and LDL-C in group â…¢, group â…£ and group â…¤ were extremely lower than those in group â…  and group â…¡ (P<0.01). The content of TC, TP, ALB and GLB in serum of rabbits in group â…¤ were extremely higher than those in group â…  and group â…¡ (P<0.01). The experiment indicates that adding 400 mg/kg Clostridium butyricum in diet can significantly improve the growth performance, promote lipid deposition, and improve immune function of rabbits. The experiment was to investigate the effect of Clostridium butyricum instead of antibiotics on growth performance and serum biochemical indexes of rabbits. Fifty healthy male rabbits at 90 d of age were randomly divided into five groups, with ten replicates in each group and one rabbit in each replicate. Rabbits in test group Ⅰ (control group) were fed with a basal diet, rabbits in group Ⅱ (antibiotic group) were fed basal diet + aureomycin 100 mg/kg, and rabbits in group Ⅲ, group Ⅳ and group Ⅴ were fed with basal diet supplemented with 100, 250 and 400 mg/kg Clostridium butyricum, respectively. The pre-test lasted for 7 d and the formal experiment lasted for 30 d. The results showed that the final weight of rabbits in group Ⅲ, group Ⅳ and group Ⅴ were extremely significantly higher than that in control group, and the result in group Ⅴ was extremely significantly higher than that in other groups (P<0.01), the average daily gain of rabbits in group Ⅳ and group Ⅴ were extremely higher than those in group Ⅰ and group Ⅱ (P<0.01); the average daily feed intake of rabbits in group Ⅲ, group Ⅳ and group Ⅴ were extremely significantly higher than that in control group (P<0.01);the feed to gain ratio of rabbits in group Ⅳ and group Ⅴ were significantly lower than that in control group (P<0.05). Serum GLU and LDL-C in group Ⅲ, group Ⅳ and group Ⅴ were extremely lower than those in group Ⅰ and group Ⅱ (P<0.01). The content of TC, TP, ALB and GLB in serum of rabbits in group Ⅴ were extremely higher than those in group Ⅰ and group Ⅱ (P<0.01). The experiment indicates that adding 400 mg/kg Clostridium butyricum in diet can significantly improve the growth performance, promote lipid deposition, and improve immune function of rabbits. [ABSTRACT FROM AUTHOR]

Feed grade fish oil is one of the commonly used animal energy feed materials in livestock and aquaculture. Fish oil is rich in n-3 series of polyunsaturated fatty acids, which can effectively increase the content of CLA in ruminant milk and meat. The rational development and utilization of fish oil resources in ruminant production can effectively improve the nutritional value. The paper briefly introduces the composition of amino acids in fish oil, reviews the effect of fish oil supplementation on meat quality of ruminants, to provide reference for rational exploitation and utilization of fish oil in ruminants. [ABSTRACT FROM AUTHOR]