Abstract:
ABSTRACT
This study was conducted to examine the effect of
dietary animal fat and dietary plant oil on broiler chicken
performance , some carcass yield and quality, blood serum
and tissue cholesterol levels , and to evaluate the economic
efficiency of oil and fat-added to broiler chickens rations .
A total of 72 day old, unsexed commercial chicks
were used in this experiment. Chicks were allotted
randomly to three treatments (24 birds for each treatment)
× four replicates (6 chicks for each replicate) and
experimently fed for 7 weeks.
Three types of diets were used: Diet A consisted of no
fat and served as a control, Diet B consisted of 1% plant oil
(cottonseed oil) and Diet C consisted of 1% animal fat (beef
tallow). These diets were formulated to be isonitrogenous
(23.2% Crude protein) and isocaloric (3100 kcal/kg
metabolizable energy).
Health of the stock, and performance parameters
were recorded. On terminal slaughter, blood samples were
taken for cholesterol determination. Measures of carcass
yield, quality, tissue cholesterol and financial evaluation
were monitores.
Animal fat and plant oil- added at 1% to broiler diets,
did not affect feed intake, feed efficiency and carcass
dressing percentage. Treatment effect in weight gain was
significant (p<0.05). Higher weight gains were recorded by
the plant oil group.
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The addition of animal fat and plant oil had a
significant (p<0.05) effect by increasing fat percentages
and decreasing protein percentages of broiler meat
compared to the control group. Moisture and ash
percentages did not differe significantly (p>0.05) in all
treatment groups.
However, serum cholesterol was affected
significantly (p<0.05) by the addition of animal fat or plant
oil. Higher serum cholesterol levels were recorded by the
animal fat added group, followed by the plant oil added
group, whereas there was no significant (p>0.05)
differences between the animal fat and the plant oil groups.
Higher tissues cholesterol levels were shown by the animal
fat group compared to the other two test groups, i.e there
were no significant (p>0.05) differences observed between
the control and the plant oil groups.
The plant oil treatment yielded the highest net
profit compares to the other two test groups.
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