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Hersh A. faraj
Sulaimaniyah University, Faculty of Agricultural science, Animal production Department
DOI: https://doi.org/10.17656/jzs.10448
Abstract
The feed restriction program is one of the main techniques in
growth curve manipulation for increasing production efficiency
in broiler chicken, therefore, this experiment was conducted to
determine the effects of different feed restriction levels, at
finisher phase from 30 to 42 days, on productive performance
and carcass traits. In this experiment a number of 90 Male Ross
broilers were used, the chicks were distributed into five
treatments at three replications for each treatment and six chicks
for each replication. The first group was control (T1) which the
chicks of this group were fed according to Ross Management
Manual, and (10, 15, 20 and 25% less than Ad-libitum) for T2,
T3, T4 and T5 respectively. The results showed that feed intake
at different levels was significantly (p<0.05) less than the control
group. Meanwhile, at 42 days old Live weight, body weight gain
and feed conversion ratio of (T2, T3, T4 and T5) were
numerically less than the control group, nevertheless, these
differences were not significant (p>0.05). The results also show
that carcass traits were significantly (p<0.05) affected by feed
restriction at which abdominal fat percentage in all treatment
groups were significantly (p>0.05) lower compared to control
group. Meanwhile carcass weight, gizzard percentage and
dressing percentage in all treatments were numerically lower
than the control groups, however differences were not significant
(p>0.05). In conclusion; results shows that using feed restriction
(less than the Ad-libitum feed intake decreased significantly the
feed intake without any effect on productive performance and
carcass traits.
Key Words:
Performance, Carcass traits, Feed Restriction, Finisher Period, Broiler
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