At the beginning of the withdrawal period, the heart weight of broiler chickens of
the first experimental group exceeded the weight of the heart of the bird of the first
control group by 42,4%, and the weight of the heart of the bird of the second
experimental group was by 30,5% higher than that of the chickens of the second control
group. At the end of the withdrawal period, the weight of the heart of broiler chickens
of the first experimental group exceeded the indicators of the first control group by
35,1%, and the heart weight of the birds of the second experimental group was higher
by 25,0% than that of the second control group.
The weight of the heart of broiler chickens of the first experimental and the first
control group relative to the slaughtered yield was 0,4% at the beginning of the
withdrawal period. The weight of the heart of the bird of the second experimental group
and the second control group was 0,5% at the end of the elimination period, while the
weight of the heart of the bird of the first experimental group at the end of the
withdrawal period and the weight of the heart of broiler chickens of the second
experimental group at the beginning of the elimination period relative to the slaughter
yield exceeded the indicators of the first and the second control groups by 25,0%.
The weight of the muscular part of the stomach of broiler chickens of the first
experimental group at the beginning of the withdrawal period exceeded the bird's
stomach weight of the first control group by 20,2%, and of the second experimental
group − by 20,4%. At the end of the elimination period, the weight of the muscular part
of the bird's stomach of the first experimental group was higher than that of the first
control group of broiler chickens by 23,4%, and of the second experimental group – by
17,9%.
The weight of the muscular part of the stomach relative to the slaughtered yield
of a poultry of the first experimental and the first control group was 1,4% at the
beginning of the withdrawal period. At the end of the elimination period, the weight of
the muscular part of the stomach of broiler chickens of the first experimental group
exceeded the indicator of the first control group by 15,4%. At the beginning and after
the withdrawal period the weight of the muscular part of the stomach relative to the
slaughter yield of the second experimental and second control group was 1,5%.
In our opinion, an increase in the weight of the muscular part of the stomach is
due to the fact, that the oral feedingwith antibiotics stimulates the appetite of birds, so
chickens consume more food, which partially stays in stomach.
Thus, the analysis of the results of the studies presented above indicates a
significant increase in the mass of the edible internal organs of broiler chickens of the
experimental group, where the pharmazin was used, compared to the first control group
(р≤0,05) at the end of the withdrawal period. In the experimental group, where
tilotsiklinvet was used, a significant increase in liver and stomach muscle mass was
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