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Effect of Compound Bacterium and Aureomycin on Performance and Chief Intestinal Well-balanced Bacilli of Broiler

Author: XuLiPing
Tutor: LouYuJie
School: Jilin Agricultural University
Course: Animal Nutrition and Feed Science
Keywords: Compound Bacterium Broiler performance Well-balanced bacilli
CLC: S816.3
Type: Master's thesis
Year: 2002
Downloads: 121
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Abstract

In the article , the effects of Compound bacterium and aureomycin on performance , chief intestinal well-balanced bacilli and resistance to disease of broiler were discussed respectively . And the experiment was conducted by two phase.In the first phase , the trial was adopted the single factor design of the experiment, and the raising experiment and the separation culture of intestinal bacilli were conducted at the same time. Broilers were randomly divided into four groups ,with 3 repeats in each one, and there were 20 broilers in each repeat. In these groups , the first one was the control group. The second one was the group in which broilers were fed aureomycin( 100 ppm) . And in the third group, broilers were fed the feed into which 3% Compound biological bacterium was added by the grain state . In the fourth group, broilers were given the drinking water in which Compound biological bacterium was added by the liquid state( 1:2000) .During this phase , health and behavior of broilers should be observed at every day. Especially the number of sick broilers and the number of dead broilers should be recorded respectively at every day. And body of broilers and the feed should be weighted in ever)’ week. In addition, the separation culture and appraisal of intestinal bacilli should also be conducted in ever)’ week.In the second phase, some broilers were attacked by artificial salmonellosis of /pullorum disease., and 180 broilers were randomly divided into three groups ,with 60 -broilers in each one. Broilers in both the first group and the second group were given the normal drinking water, and broilers in third group were given the drinking water in which Compound biological bacterium was added by the liquid state. After 2 days , broilers in both the second group and the third group were attacked by artificial salmonellosis of pullorum disease( 20 billion bacteria were poured down the oral cavity to each broiler).And in this phase, the number of sick broilers and the number of dead broilers should be also recorded at every day. And the change of intestinal bacilli in the caecum of broilers should be checked both before broilers were attacked by artificial salmonellosis of pullorum disease and at 2, 5, 9, 13, 20 day after the broilers were attacked by artificial salmonellosis of pullorum disease.The results indicated that the weight of broilers fed aureomycin was higher than that of control group by 13.14%< p<0.01) in the second week . Hie weight of broilers fed aureomycin was respectively higher than that of control group by 14.96%( p<0.01) and 14.73%( p<0.05) in the third week and in the fourth week. And the weight of broilers(from 1 to 49 day) fed aureomycin was significantly higher than that of control group by 8.73%(p<0.05). So we conclude that aureomycin can accelerate the growth of broiler at the earlier stage. But there was no significant difference in the weight between the broiler(from 1 to 49 day) fed Compound bacterium by the grain state or by the liquid state and the control group (p--0.05).In addition , from the result of the separation culture of intestinal bacilli , we can find that aureomycin could significantly inhibit Escherichia coli which was at the initial stage from growing , and Compound bacterium can enhance the resistance at beginning of the plantation of well-balanced bacilli in the broiler’s intestine .After finfecting the broiler with artificial salmonellosis of pullorum disease , we can find the death rate of broiler which was not fed Compound bacterium was higher than that of broiler fed Compound bacterium by 20%. On the other hand , the number of Escherichia coli was significantly increased, and the number of Bacillus bifidus andiLactobacillus lactis was significantly decreased in the intestine of the broiler.From the analysis , we can conclude that one of the reason why aureomycin can prompt the growth of broiler at the earlier stage is that aureomycin can significantly inhibit Escherichia coli which was at the initia

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