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CONSUMED 1ST GENERATION DAUGHTERS OF VARIOUS
HOLSTEIN LINES FEATURES OF COVERING FEED WITH LIVE
WEIGHT
Tursunboyev Shokhrukh Bobir ogli
Scientific-research institute of livestock and
poultry, independent researcher
Giyasov Husanjon Abdullayevich
Scientific-research institute of livestock and poultry, “Cattle Breeding”
Department chief, senior researcher
https://doi.org/10.5281/zenodo.15599264
Abstract:
The article
presents the results of scientific research on the feed
conversion ratio of bodies of various lines of the Danish Holstein breed .
Keywords :
Danish selection, Holstein breed, lines, feed consumption, live
weight, EOB, absolute growth, indicators.
Introduction.
In assessing the efficiency of using young growing bodies in
complex herds organized on the basis of industrial dairy production, the level of
their feed coverage with live weight during the growth period is of great
importance. According to the conclusions, the development of a full-value
optimal type of feeding of cows gives a high efficiency in increasing the volume
of product production. When using an effective type of feeding, the genetic
potential of cows for productivity is revealed to a high degree, and the level of
feed coverage with milk is significantly improved, and the economic efficiency of
the industry is improved [1]. The results of the study show that providing cows
with full-value feeding from weaning to calving leads to an increase in milk
productivity in the next lactation.
Research results.
As shown in Table 1, the productivity of the
experimental bodies was directly related to the feed intake and live weight gain
indicators studied during our experiment.
Table 1
Feed intake live weight ratios of carcasses from different lines
Growth
period,
months
I- experiment
II- experiment
III- experiment
Absolute
growth,
kg
EOB
Absolute
growth,
kg
EOB
Absolute
growth,
kg
EOB
0-90
67.30
270.58
65.2
267.36
63.47
258.63
180
76.59
406.87
74.07
401.04
72.0
389.94
270
72.07
646.85
69.9
608.15
67.5
586.7
360
67.5
694.1
65.0
659.9
63.27
644.96
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450
63.07
763.9
60.37
747.64
57.87
734.5
Total
346.53
2782.3
334.54
2683.45 324.11
2612.72
In the experiment, the bodies of the I-experiment group spent 270.58 kg of
EOB from birth to 90 days of age, 4.02 kg of EOB to gain 1 kg of weight, 406.87
EOB to gain 1 kg of weight, an average of 5.31 EOB, at the age of 207 days, 8.71
EOB, at the age of 360 days, 10.3 kg of EOB, at the age of 450 days, 12.11 EOB,
and an average of 8.02 EOB were spent during the entire experiment. The peers
in the II-experimental group spent 267.36 kg of EOB up to 90 days of age, and on
average, 4.10 EOB to gain 1 kg of live weight, up to 180 days of age, and 401.04
kg of EOB to gain 1 kg of live weight, on average, 5.41 kg of EOB, up to 270 days
of age, and 608.15 kg of EOB to gain 1 kg of average weight, 8.70 kg of EOB, up to
360 days of age, and 659.9 kg of EOB to gain 1 kg of average live weight, 10.15 kg
of EOB. Up to 450 days of age, and 746.64 EOB to gain 1 kg of live weight, 12.38
kg of EOB. During the entire period of separation, a total of 2683.45 kg of feed
was consumed, with an average of 8.02 kg of feed consumed to gain 1 kg of live
weight.
The peers in the III-experiment group were given the same dose at the age
of 90 days.
258.63 kg of EOB were used to gain 1 kg of live weight, an average of 4.07
kg of EOB were used, at 180 days of age 389.94 kg of EOB were used to gain 1 kg
of live weight, an average of 5.41 kg of EOB were used, at 270 days of age 586.7
kg of EOB were used to gain 1 kg of live weight, an average of 8.69 kg of EOB
were used. At 360 days of age 644.96 kg of EOB were used to gain 1 kg of live
weight, an average of 10.91 kg of EOB were used, at 450 days of age 734.5 EOB
were used to gain 1 kg of live weight, an average of 12.69 kg of EOB were used,
for the total growth and development periods 2612.72 kg of EOB were used to
gain 1 kg of live weight, an average of 8.08 kg of EOB were used
.
Conclusion:
The high absolute growth rates achieved in the period of
gestation are explained by the fact that the daughters of Holstein cows of Danish
selection reproduce the genetic potential of their mothers during all periods of
growth and development and that they assimilate the given nutrients well.
List of used literature:
1.
Amirov Sh.K., Abulsaidov B.S., Usmonova L.Sh. Feed and nutrition are
important factors in the productivity of cows . //Samarkand State University of
Veterinary Medicine, Animal Husbandry and Biotechnologies Republican
Scientific and Practical Conference on “Prospective Tasks of the Development
ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
122
and Introduction of Innovative Technologies in Agriculture” (May 12-14, 2022,
pp. 238-240)
2.
Asraev U.B., Kakhkharov A.K., Khidirov K.I. Growth and development of
Holstein cattle calves intended for replenishment of the herd during intensive
feeding. // Animal husbandry and breeding work. 2019. No. 3. 7- 9 p.
3.
Ashirov M., Nurmatov A., Allashov B., Eshmatov I., Ruziev R. Jumadullaev
B., Khidirov K., Komilov A., Jamolov S., Bahriddinov F.// Practical guide to the
development of livestock farming in farmers' and peasant farms and households
Tashkent 2019, 11 p.
4.
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vosproizvoditelnie kachestva korov cherno-vestroy porodi otechestvennoy i
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