The
second and third groups were fed with the different dietary regimes supplemented
with 0.3 ppm mineral Se (Sodium selenite) or organic Se (Se enriched
yeast) respectively. Growth performance (body weight, body weight
gain, feed intake and feed conversion ratio) were recorded on the 21st and
the 42nd days and carcass traits (chilled carcass weight and chilled carcass
yield, whole carcass drip-loss) were measured after slaughtering on the 42nd
day. Whatever the origin of Se supplementation, no significant effect on
body weight, body weight gain and feed intake was observed on days 21
and 42, and chilled carcass weights and their yield were also unaffected at
the end of experiment. By contrast, total feed conversion ratio (from the 1st
to the 42nd days) was significantly improved and whole carcass drip-loss
was significantly reduced in birds receiving 0.3 ppm organic Se in comparison
to the other groups (P