ABSTRACT
The influence of the Czechoslovak developmental preparation of vitamin E, added to the feeding mixture in loose form (40 mg . kg-1) for the broiler-type chickens (from the 1st day after hatching to the 49th day of age), on the red blood count, peroxidase haemolysis of erythrocytes and on the activities of glutamate-oxalacetate transaminase (AST) and glutamate-pyruvale transminase (ALT) was studied. The results were compared with those achieved with chickens administered the same dose of the so far used vitamin E in the oil form, Soviet-made preparation and the Swiss-made preparation Rovimix E, and with the group of chickens fed the diets containing no vitamin E. Up to the age of 21 days no marked differences in the erythrograms were observed, and the erythrocyte oxidation haemolysis and the AST and ALT activities were high in all groups of chickens. Similarly, from the 28th day to the day of killing the values of red blood picture showed no substantial changes. In the chickens fed no vitamin E, the degree of erythrocyte haemolysis was statistically significantly the highest (14.0-38.8%), however, beginning the 28th day, the high haemolysis values were also observed in the chickens fed the oil preparation of vitamin E (16.8-21,7%). The lowest erythrocyte haemolysis was found in the chickens fed the Czechoslovak-made preparation (1.2-12.1%) and chickens fed the diet without vitamin E supplement (2.1-3.39 mukat . 1(-1); the administered preparation had no effect on the ALT activity.
