Comparative Study Of Dietary Supplemented With Bacillus Coagulans And Clostridium Butyricum On Growth Performance In Broilers

This experiment was to compare the effects of dietary supplemented Bacillus coagulans and Clostridium butyricum on growth performance of broilers.A total of960 1-day-old AA broilers were divided into 4 groups with 8 replicates per group and30 broilers per replicate.The groups were as follows:1)control group,feeding basal diet;2)Antibiotic group,fed the basal diet plus oxytetracycline 300 g/t;3)Bacillus coagulans group,fed the basal diet plus 1×10~7 cfu/g Bacillus coagulans;4)Clostridium butyricum group,fed the basal diet plus 1×10~7 cfu/g Clostridium butyricum.The experiment lasted from 1 to 42 days of age.The results showed as follows:1.During the whole feeding experiment,compared with the control group,the average daily gain of broilers in antibiotic group and Bacillus coagulans group was significantly increased(P<0.05),the ratio of feed to gain was significantly decreased(P<0.05),and no significant difference between antibiotic group and Bacillus coagulans group(P>0.05).Moreover,there were no significant differences in growth performance between the Clostridium butyricum group and the control group(P>0.05).2.Compared with the control group,the blood ratio of A/G,the content of UA,TC,and HDL-C in antibiotic group was significantly increased(P<0.05).Compared with the control group,the UA content of broilers in Bacillus coagulans and Clostridium butyricum groups was significantly decreased(P<0.05),the content of TC and the HDL-C in Bacillus coagulans and Clostridium butyricum groups was significantly increased(P<0.05).There were no significant differences in the blood ratio of A/G and UA content between the Bacillus coagulans group and the antibiotic group(P>0.05).3.Compared with the control group,no significant differences in serum ALT and AST levels among the three experimental groups(P>0.05).4.Compared with the control group,the number of fecal Lactobacillus and Escherichia coli of broilers in antibiotic group was significantly decreased(P<0.05),and the Lactobacillus/Escherichia coli value was significantly increased(P<0.05).Compared with the control group,fecal Lactobacillus numbers in Bacillus coagulans and Clostridium butyricum groups were significantly increased(P<0.05),Escherichia coli were significantly decreased(P<0.05),and Lactobacillus/Escherichia coli values were significantly increased(P<0.05).In conclusion,dietary supplemented Bacillus coagulans improved the growth performance of broiler chickens by regulating intestinal flora,and the improvement efficiency of Bacillus coagulans was better than Clostridium butyricum.