الفهرس 
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Abstract
The current study compared the effect of dietary supplementation of potential
antioxidants (vitamin E, selenium and hydrolysable tannins) on growth
performances, carcass traits, and some blood serum metabolites of seventy growing
NZW rabbits reared during summer season (31.31±2°C).Weaned rabbits were
equally distributed among seven dietary experimental treatments and fed ad libitum
for eight weeks; a basal diet without supplemented antioxidants served as a control,
the other six diets contained 100 or 200 mg vitamin E/kg diet, 0.1 or 0.2 mg Se/kg
diet, 1.5 or 3.0 g hydrolysable tannins/kg diet. Results indicated that total live weight
gain was not significantly affected by dietary treatments. Feed intake was
significantly higher in control followed by vitamin E (100 mg/kg) groups, compared
to other treatments. Feed conversion ratio was improved (P<0.05) with 0.1 mg Se/kg
diet (14.2%) and with 1.5 g tannins/kg diet (16.1%) compared to the control. None
of the studied dietary supplements significantly affected carcass traits or blood
serum metabolites of the rabbits. In summer season, the dietary supplementation
with vitamin E (100 mg/kg), selenium (0.1mg/kg diet) or tannins (1.5 g/kg diet) only
improve rabbits feed conversion ratio.
Key words: Rabbit, vitamin E, selenium, tannins, summer, growth.