ASSESSMENT OF A SYNBIOTIC EFFECT ON BROILER PRODUCTIVE PERFORMANCE AND ANTIOXIDATIVE ENZYMES ACTIVITY

The biological experiment was conducted in order to investigate the influence of synbiotic addition in broiler's nutrition on productive performance and antioxidative status. In the control treatment (T1) the broilers were fed with commercial mixtures of standard composition and quality. Experimental broilers were fed with the same mixtures supplemented with synbiotic (T2) or antibiotic salinomycin (T3). During the preparation period chickens received a starter mixture without additions, thereafter, chickens were fed with finisher mixtures according to the experimental design. At the end of the experiment (day 42) chickens in experimental treatments T2 and T3 achieved significantly (p<0.05) higher final body masses compared to the chickens in T1 treatment. Also, after completing the trial, significantly (p<0.05) lower feed conversion ratios were noticed in experimental treatments compared to treatment T1. Chicken mortality rate was the lowest in treatment T2 and the highest in treatment T1. The significantly lowest (p<0.05) serum malondialdehyde content was recorded in treatment T2, followed by treatments T3 and T1, respectively, while the highest GSH content was in treatment T2. On the basis of obtained findings, it can be concluded that the addition of synbiotic in chicken's nutrition had positive impact on productive performance and antioxidative protection in broilers blood.