The effect of organic selenium as feed additive contained in thefeed was investigated, applied in concentrations of 0.3 and 0.4 mg Se/kg mixtureon production characteristics pheasant. The study was conducted on a total of 45common pheasant individuals Phasianus colchicus, six weeks old, divided intothree equal groups of 15 individuals for 60 days. The control pheasants group wasfed with a standard mixture without addition of selenium during the experiment,while the mixture of group I contained 0.15 g/kg and pheasants group II had 0.20g/kg additives with organic selenium. The results showed that different amounts oforganic selenium presence in pheasants’ feed had a positive effect on analyzedproductivity indicators of pheasants’ growth rate, both their final body weight andweight gain (p<0.05). Among examined groups of pheasant, gained differences inaverage feed conversion and total production index were not statistically significant(p> 0.05). The best production results were achieved by individual II group, whichalso had the highest selenium content in muscle tissue of the pectoral muscles,drumstick and thigh
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