| Issue |
E3S Web Conf.
Volume 254, 2021
International Scientific and Practical Conference “Fundamental and Applied Research in Biology and Agriculture: Current Issues, Achievements and Innovations” (FARBA 2021)
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|---|---|---|
| Article Number | 08024 | |
| Number of page(s) | 5 | |
| Section | Scientific Support for the Innovative Development of Animal Husbandry | |
| DOI | https://doi.org/10.1051/e3sconf/202125408024 | |
| Published online | 05 May 2021 | |
Changes in the live weight of cows with age and its impact on their productive qualities
1 Ural State Agricultural University, Karl Liebknecht str., 42, 620075 Yekaterinburg, Russian Federation
2 K.G. Razumovsky Moscow State University of technologies and management (The First Cossack University), Zemlyanoy Val St., 73, 109004 Moscow, Russian Federation
* Corresponding author: olgao205en@yandex.ru
In the Sverdlovsk region, holstinized black-and-white cattle of the Ural type is bred, which is represented by large, highly productive animals with a high genetic potential for productivity. The purpose of the work is to study the dynamics of live weight of cows with age and its relationship with milk productivity. In animals, there is an increase in live weight with age by 22.6 kg (from 3 to 4 lactation) – 46.2 kg (from the first to the 2 lactation) or by 3.4 – 7.9%. With an increase in live weight, there was an increase in milk yields up to 3 lactation, and then their decrease. The greatest decrease was observed in the fifth lactation. The coefficient of milk production decreases with the age of cows and is accompanied by an increase in live weight. Despite an increase in live weight and a decrease in milk yield for every 100 kg of live weight of cows, all of them turned out to be of dairy-oriented productivity. However, it should be noted that achieving a live weight of 710 kg or more leads to a decrease in the efficiency of cow use. There is a low negative relationship between live weight and milk yield of cows.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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