کد مقاله : BIP-014

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T. Steiner, A. Kroismayr, M. Mohnl, R. Nichol, and S. Attamankune

The aim of the trial was to investigate the efcacy of a synbiotic and phytogenic product in comparison to an AGP in broilers. The synbiotic preparation was based on different probiotic strains and fructooligosaccharides (FOS), whereas the phytogenic formula contained a blend of essential oils and FOS. 2400 one-day-old Ross
broiler chicks were assigned to four dietary treatments, comprising 10 replicates per treatment (5 replicates for male and 5 replicates for female) with 60 birds per replicate. The treatments were (1) negative control (NC), (2) NC + synbiotic, (3) NC + phytogenic, (4) NC + AGP (Flavomycin). The synbiotic (Biomin® PoultryStar) was applied via the drinking water on the rst three days and at each

vaccination, whereas the phytogenic (Biomin® P.E.P.) and AGP were added to the feed throughout the whole period. Monensin (100 g/t) was included in the starter and grower diets as anti-coccidial agent. Mash feed and water were provided ad libitum. Body weight and feed consumption were recorded on day 1, 17, 38 and 45. All birds were subjected to a vaccination program, including Newcastle Disease (ND), Infectious Bursal Disease (IBD) and Infectious Bronchitis (IB). 3 birds out of each replicate were randomly collected for taking blood samples. In these samples ND, IB, and IBD immune status on d 35 were determined by hem gglutination inhibition and ELISA test. After 45 d, performance parameters were numerically improved by supplementation of the diets with Natural Growth Promoters and AGP. Compared to the NC, synbiotic, phytogenic and AGP increased weight gain by 2.8, 4.2 and 4.5%, respectively (1894 vs. 1947 vs. 1973 vs. 1979 g, P>0.05). Gain:feed ratio amounted to 0.56, 0.58, 0.58 and 0.57, respectively (P>0.05), and mortality was 1.12, 0.53, 0.36 and 0.59%, respectively, in treatments 1, 2, 3 and 4. Compared to the NC, immune parameters indicated numerically better values in treatments 2, 3 and 4 for IBD and IB. Based on the performance parameters of the present trial, the synbiotic and phytogenic product represented equivalent alternatives to AGP in broiler production.