| Autor: |
V. N. TIMOSHENKO, I. P. SHEIKO, N. I. PESOTSKY, R. V. BEREZOVIK, I. N. KORONETS, T. A. VOROBYEVA, V. N. ROGACH |
| Rok vydání: |
2022 |
| Zdroj: |
Zootechnical science of Belarus. 57:133-139 |
| ISSN: |
0134-9732 |
| Popis: |
The article contains the materials of research, the purpose of which was to study the livability, growth and development of replacement heifers of red dairy breeds. The object of research were purebred cows and young replacements of Holstein and red dairy breeds. Studies have shown that under the same industrial housing conditions, replacement heifers of red dairy breeds aged from 6 months to the first insemination are considerably superior to their counterparts of Holstein breed in live weight and average daily weight gain. Their first insemination came 0.7 months earlier than that of their Holstein counterparts. The rate of withdrawal from the herd due to breeding culling in heifers of red dairy breeds was lower compared to their Holstein counterparts. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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