This paper investigates the effect of soybean, flax and rapeseed oil on
productive performance and lipid fatty acid composition of broiler chickens.
Six groups of 40 one day-old chicks hybrid line Cobb 500, with five
replications were formed. Three mixtures with 21, 20 and 18% protein were
used. The first 14 days groups were fed with the starter mixture. The control
group was based on the 4% and 8% soybean oil while in the experimental groups
were included the same concentration of flax and rapeseed oil. The experiment
lasted 42 days. At the end of the experiment 10 chickens from each group were
sacrificed for examination of fatty acid composition of lipids. The control
group achieved weight of 2704g and 2695g, and the experimental group in 2735,
2645, 2735 and 2670g, respectively. Feed conversion was improved with
increasing the amount of oil in the diet. The usage of flax and rapeseed oil
changed the fatty acid composition of lipids. Substituting soybean oil with
rapeseed oil reduces the percentage of palmitic, stearic, and linoleic acids,
and increases participation of oleic and linoleic acids in abdominal fat. The
inclusion of flaxseed oil in the diet of chickens in the amount of 4% and 8%,
increases the amount of linoleic acid by 63% and 203%, which is a
statistically high and significant difference for the control group I and II,
while the amount of linoleic acid is reduced by 14% and 33 %, which presents
a statistically significant difference compared to group II.