In other words, the P. oleracea extracts could improve
daily gain of broilers. It was seen that the addition of
different proportions of P. oleracea extracts had different
effects on the BWG and FCR. Table 2 showed that
0.2% of P. oleracea extracts supplement could promote
the growth performance of broilers on d 28 and 42, but
the supplementation had no significant effects on broilers
on d 14. In our later research, we will focus on the
effect of P. oleracea extracts administered at different
phases, to decide reasonable application of this herb
additive.
Bai et al