EFFECTS OF BACTERIOPHAGE SUPPLEMENTED DIET ON INTESTINAL BENEFICIARY MICROFLORA AND PRODUCTIVE PERFORMANCE OF BROILER

Abstract

The Experiment was done to investigate the effects of dietary bacteriophage (BP) supplementation on production performance and status of microflora in excreta along with carcass characteristics in broilers. A total of 600 day old broiler chicks were reared randomly allotted in 5 treatment groups having 4 replications R 1, R 2, R 3 and R .Where each replication contain 30 birds for 5 weeks at SAU Poultry Farm, Dhaka-1207.These dietary treatments were designed as T 0 (Control diet), T (Control+ 0.5g Bacteriophage per kg feed),T 2 (Control+ 0.75g Bacteriophage per kg feed ) ,T 1 (Control+1g Bacteriophage per kg feed) and T 4 3 ( Control+ANT 0.05g per Kg Feed). In broilers the inclusion of antibiotic and bacteriophages directly affect the feed intake (P= 0.002) among the five groups.BWG (Body Weight Gain) in T group was higher(2209.00 ±16.45 gm) which showed significant differences (P<0.05) among the other groups. LW (Live weight), FC( Feed Consumption) and FCR(Feed Conversion Ratio) at the end of 5 1 th week were significant (P< 0.05) in different group, however better BWG, LW, FC were found in treated group T where BWG, LW and FC were 2209.00 ±16.45 gm , 2251.00±16.45 gm & 3069.00±22.70 gm respectively. Whereas FCR performance was positively correlated with the levels of bacteriophage given in the diet. Highest FCR (1.39 ± 0.02) found in T treatment. However, there are insignificant effect found in survivability (P >0.05) at 35 days of age of broiler .Bacteriophage group showed significant results in case of liver ,spleen, heart & breast weight compared to control and antibiotic except the gizzard weight . Results demonstrated that the average ammonia level was same at the end of the 1 week , however it varied significantly (P<0.05) at the 3 rd & 4 th weeks of age (10.10±0.57 ppm & 13.75 ± 1.02 ppm). But at the end of 5 th week T 2 & T group showed highest ammonia emissions (18.50± 0.65 ppm & 18.25± 0.85 ppm respectively). Ammonia emissions were found lowest in T 1 3 (13.25±1.38 ppm).Flock uniformity demonstrated significant differences between the control and T Group (67.72± 4.27 %.).The lactobacillus was significantly (P<0.05) lower in antibiotic and control group rather than the bacteriophage supplemented diet . T 1 1 showed highest lactobacillus (3.97 ± 0.13 CFU/ml) and T showed the lowest (0.43± 0.07 CFU/ml). In conclusion, it can be said that , bacteriophage supplementation has beneficial effects on production performance of broiler and it can expand the beneficiary microbes in guts of commercial broiler chicken.