SUMMARY

Point of these investigations was corvrparison of two selenium sources in growing pullets diet. Pullets, 9 weeks old, were divided into 2 groups of 200 chicks each with 4 replication. First group fed diet Mixture with standard inorganic form of selenium and was control for the second group whose diet contained organic form of selenium (SelPlex). Diets of the experimental groups were isonitrojenic and isocaloric and differences were only in the forrvrs of selenium. Obtained results have shown that pararmeters observed during the trial were better in experimental pullet group received organic form of selenium. Differences weren't statistically significant.

          Key words: growing pullets, selenium, SelPlex, body weight, daily weight gain, body weight gain, feed consumption, feed conversion ratio.