Effects Of Lactobacillus And Its Culture Fluid On Growth Performance, Intestinal Tract Microflora And Intestinal Structure Of Broilers

In vivo it usually have large quantities and variety of microorganisms,they are usually mixed with a certain proportion that did not appear abnormal or pathogenic phenomenon, saying that these microorganisms as normal flora,These flora are an indispensable component in vivo,there is harmless to the host in the balance of the state. In the intestinal flora, the different bacteria will happen between different mutual relations, there is beneficial to one or two and harmful to one or two microorganisms, the major interaction of these microorganisms is symbiosis of between beneficial bacteria and competition of harmful one.Lactobacillus is one of the important probiotics and are one of the important ascendant microflora in normal microflora,that is crucial for the ecological balance of the intestine,it is able to adjust the structure of intestinal microflora,inhibit the growth of animal.Lactobacillus and its Culture fluid were tested on the broiler feeding trial,observed the changes of broiler intestinal flora,intestinal structure,growth performance and immune function,the following conclusions were demonstrated:1 lactobacillus powder was added separately and could inhibit the reproduction of Escherichia coli significantly,and promoted proliferation of Lactobacillus and Bifidobacterium,the effect was significant(P<0.05);Effect of Lactobacillus Culture fluid is similar to the powder,effect of Lactobacillus Supernatants and Inactivated culture is not significant.2 lactobacillus powder,Culture fluid,Supernatants and Inactivated culture could varied degrees of raising broiler Newcastle disease hemagglutination inhibition antibody titers and immune organ index(P<0.05);but powder and Culture fluid were best, surpassed Supernatants and Inactivated culture.3 Added lactobacillus powder,Culture fluid and Supernatants, the daily gain of the experimental chickens were super to control group,Lactobacillus and its Culture fluid can promoted weight gain significant.Lactobacillus powder and Culture fluid can significantly promote the broiler biochemical indicators to the development of the useful direction,the effect of the added powder and Culture fluid were better.It demonstrated the viable organism was better than its Culture fluid.4 In the test the lactobacillus powder and Culture fluid could significantly promote the growth of the cecum and the small intestine villi(P<0.05),and promoted wall thickness increasing;the results of Supernatants and Inactivated culture were not significant.Lactobacillus powder and Culture fluid could increase ileum villi,increased wall thickening,improved the growth of broiler intestinal evidently.The results showed that the lactobacillus powder and Culture fluid improved broiler intestinal microflora,intestinal structure and body growth differently,the effect of the Supernatants and Inactivated culture were more significant than the powder and Culture fluid.