The most representative in evaluating the results of the growth of young birds in
the meat production direction is the homogeneity of the population; therefore, for the
analysis of the productivity of broiler chickens, their distribution by body weight at the
slaughter age was analyzed (Fig. 1).
Figure 1. Distribution of chicken population by body weight
The number of chickens weighing up to 2600 g was reduced in groups from
control to fifth. The most homogeneous population was in the control group, whose
chickens received sulfates of microelements (Mn, Zn, Fe, Cu) in their ration.
In the study, the consumption of feed by broiler chickens of all groups was
recorded (Table 5).
Table 5 Average daily consumption of mixed feed, g/c
Age of chickens, days
Group
1
2
3
4
5
1–7
23.5
23.1
23.8
24.1
23.7
8–14
53.1
53.6
53.8
54.1
53.3
15–21
93.2
93.9
93.5
94.2
94.0
22–28
132.2
134.6
133.8
133.1
134.3
29–35
171.2
173.3
171.6
175.1
172.8
36–42
196.5
198.1
197.5
195.9
196.2
For the whole period of
the experiment
4688
4736
4718
4736
4720
The uneven growth rate of broiler chickens due to different sources and content
of microelements (Mn, Zn, Fe, Cu) in combined feed contributed to feed costs per feed
conversion to productivity (Table 6).
0
20
40
60
80
100
1
2
3
4
5
16
14
11
9
8
69
64
67
72
68
12
20
20
17
21
Homogeneity of the broiler chicken population by weight, %
Gr
oup
by 2600 g
from 2600 g by 3000 g
from 3000 g
- 1309 -