ISSN: 2776-0979, Volume 3, Issue 12, Dec., 2022 900
Table 1 shows the milk yield of cows in the experimental groups.
Table 1 Milk yield per 1 lactation of cows
Indicators
Groups
I
II
III
Х
+S
х
С
v,%
Х
+S
х
С
v,%
Х
+S
х
С
v,%
Amount of milk,
kg
4283,6+72,0
6,29
4430,7+75,3
6,36
4565,6+107,1
8,78
Milk fat, %
3,94+0,035
3,29
3,93+0,026
2,44
3,91+0,03
2,67
Consumption of
milk fat, kg
168,7+2,03
4,52
174,1+2,17
4,68
178,5+3,11
6,52
4% milk, kg
4219,3+49,5
4,40
4353,2+54,5
4,69
4462,9+77,7
6,53
Live weight, kg
450,3+4,69
3,90
470,1+1,82
5,47
489,7+2,25
1,72
Dry matter, %
12,45
12,44
12,41
Dehydrated dry
milk residue, %
8,67
8,67
8,66
Milk sugar, %
4,51
4,51
4,50
An analysis of the table data shows that the milk yield level of Holstein cows is
inextricably linked to the live weight at first birth. In our study, the amount of milk in
lactation I of cows of group III with a live weight of more than 481 kg in the first birth
was 282.0 kg (P> 0.95) and 134.9 kg, respectively, of cows in groups I and II,
respectively, and the milk fat yield was 10.8 kg (P > 0.99) and 4.4 kg, 4% milk content
was found to be higher than 243.6 kg (P> 0.99) and 209.7 kg (P> 0.95).
In group II, the average live weight of cows was 450.3 kg, and in lactation I cows of
group I were 147.1 kg in terms of milk yield, 6.4 kg in terms of milk fat consumption,
133.9 kg in terms of 4% milk yield. It was found that
Table 2 shows the consumption of dairy products per 100 kg of live weight in the first
lactation of cows in the experimental groups.
Table 2 Consumption of dairy products per 100 kg of live weight of cows, kg
Indicators
Groups
I
II
III
Milk with natural fat
951,3
942,5
932,3
Milk fat consumption
37,46
37,03
36,45
4 % milk
937,0
926,0
911,3
As shown in Table 2, cows in all groups had high milk production rates per 100 kg of
live weight during lactation I. At the same time, the amount of milk produced by cows
of group I at the expense of the specified weight is 8.8 and 1.9 kg, respectively, from
cows of groups II and III, milk fat consumption is 0.43 and 1.01 kg, 4% milk is 11.0
and 25, It was found to be 7 kg high.