Shewita and Taha (2011) showed that
inclusion of N. Sativa in the diets of broiler chickens improved
body weight and FCR at a lower dose while a higher inclusion
rate showed no significant differences in comparison with the
control group. The findings in the present study with regard
to the performance are in agreement with those of Majeed
et al. (2010) and Nasir and Grashorn (2010). In contrast to
the present study, however, El-Nattat and El-Kady (2007) reported
that supplementation of black cumin meal at the level
of 17% into the diet decreased broiler chicken performance.
Similar findings were reported by Abbas and Ahmed when
they used BCS at a level of 1% or 2%.