SCIENCE AND INNOVATION IN THE
EDUCATION SYSTEM
International scientific-online conference
112
THE PROGRESSION OF THE LACTATION PERIOD IN COWS
A.Ibadullaeva
(PhD in Agricultural Sciences), Karakalpakstan
Institute of Agriculture and Agrotechnologies;
Kh.Masharipova
(Independent Researcher, Karakalpakstan Institute
of Agriculture and Agrotechnologies);
A.Kaniyazova
(Independent Researcher,scientific-research
institute of livestock and poultry);
T.Ibadullaeva
(Student, Karakalpak State University);
M. Bonni
(Student, Tashkent State Agrarian University)
https://doi.org/10.5281/zenodo.15267918
Abstract
Research has shown that the milk productivity of local cows depends on the
nature of the lactation process. Cows with a uniform course of lactation are
characterized by higher milk productivity.
Keywords
: cow, lactation, yield, milk, productivity
The milk productivity of cows is associated with the characteristics of their
lactation period. Generally, cows with uniform lactation demonstrate better milk
productivity. Our study examined how the course of lactation affects milk yield
in cows.
Research was conducted on local cows in household farms in the Muynak
district of the Republic of Karakalpakstan.
In household farms, the milk productivity obtained from livestock is quite
low. This is due to the lack of opportunities to provide adequate feed, the
absence of processing technologies for available feed, and the lack of
understanding of feeding livestock based on a balanced ration. In our research,
we studied the milk productivity indicators of cows by feeding them a fully
balanced ration (Table 1).
Table 1
Milk productivity of local cows at different lactation stages in the
experimental herd
Indicators
III and above
X±Sx
Cv,%
Milk yield, kg
2014,8±182,1
29,9
Fat content in milk, %
3,94±0,043
3,63
SCIENCE AND INNOVATION IN THE
EDUCATION SYSTEM
International scientific-online conference
113
Milk fat yield, kg
79,17±7,35
30,73
Protein content in milk, %
3,56±0,029
2,78
Milk protein yield, kg
718,8±9,34
30,93
4% fat-corrected milk yield, kg
1988,9±185,7
30,57
According to the data in Table 1, a higher level of feeding for local cows
created an opportunity to significantly increase their milk productivity during
the lactation period. On average, 2014.8 kg of milk with a fat content of 3.94%
was obtained from one cow during lactation, and the protein content in the milk
was 3.56%.
Table 2 presents the monthly milk yield of the cows in the experiment
during the lactation period, along with the persistency coefficient of the milking
period and the milk yield decline index.
Table 2
Changes in cows' monthly milk yield, milking period persistency coefficient,
and milk yield decline index
Milking
moths
Groups
I
Milk yield, kg
Milking
period
persistency coefficient,
%
Milk yield decline
index, %
I
156,8
100
54,4
II
224,5
143,2
77,8
III
288,2
128,4
-
IV
285,7
99,1
99,13
V
262,2
91,8
90
VI
229,7
87,6
79,7
VII
199,2
86,7
69,1
VIII
168,7
84,6
58,5
IX
128,6
-
44,6
X
70,8
-
24,6
Milk
yield
for
the
entire
milking
period, kg
2014,8
102,6
-
SCIENCE AND INNOVATION IN THE
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According to the table data, the monthly milk yield of the cows changed
uniformly, which can also be observed from the persistency coefficient of the
milking period and the milk yield decline index.
Studying the lactation curve is of particular importance when evaluating
the uniformity of the milking period in cows (Figure 1).
Figure 1. Dynamics of Monthly Milk Yield During Cow Lactation
As seen in Figure 1, the highest monthly milk yield in cows was observed in
the third month of lactation, and it remained high until the fifth month. Starting
from the sixth month, the yield gradually began to decline.
These findings indicate that, along with achieving high milk productivity
through balanced feeding, the milk yield during lactation in local cows also
followed a uniform course.
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156,875
224,5
288,25
285,75
262,25
229,75
199
168,75
128,8
70,8
0
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SCIENCE AND INNOVATION IN THE
EDUCATION SYSTEM
International scientific-online conference
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Volume 10, Issue 1, 2021.
