The influence of different feed additives to performances and immune response in broiler chicken
2007
Tokic, V., School of Agriculture and Veterinary Medicine, Svilajnac (Serbia) | Lazarevic, M., Faculty of Veterinary Medicine, Belgrade (Serbia) | Sinovec, Z., Faculty of Veterinary Medicine, Belgrade (Serbia) | Tokic, A., School of Agriculture and Veterinary Medicine, Svilajnac (Serbia)
Total of 186 chickens was included in the study which lasted 42 days. Birds were fed ad libitum three different complete food mixtures (from days 1-21, 21-35 and 35-42) according to the standard fattening procedure. Mixtures for chickens from the first group were supplemented with mannan-oligosaccharide based prebiotics and for the birds from the second group with polysaccharide microelement (Fe, Cu, Zn and Mn) complexes. Broilers in control group had daily weight gain of 49.1 g, daily feed consumption of 115.5 g, and feed : gain ratio 2.35. In the group of broilers feed mixtures supplemented with mannan-oligosaccharides, the daily weight gain was higher (+14.95%), daily feed consumption was lower (-2.67) and feed : gain ratio was smaller (-15.32%) when compared to the control group. In the group of broilers fed mixtures with polysaccharide microelement complexes, the daily weight gain was also higher (+11.43%), daily feed consumption was lower (-4.28) and feed : gain ratio was smaller (-14.0%) when compared to the control group. Following revaccination against NCD, broilers fed MOS based prebiotics had significantly higher titers of antibodies than observed in the other two groups. The highest degree of cutaneous hypersensitivity to PHA was recorded in the group of broilers fed mixtures with polysaccharide microelement complexes.
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