| Autor: |
Ulimbashev, M. B., Huranov, A. M., Krasnova, O. A., Kudrin, M. R., Hardina, E. V., Paritov, A. Yu. |
| Zdroj: |
Russian Agricultural Sciences; Mar2020, Vol. 46 Issue 2, p171-174, 4p |
| Abstrakt: |
The objective of the surveys was to study fertility and productive performance of heifers and cows of the Red Steppe breed under different atmospheric pressure gradients of 725–750, 751–775, 774 mm Hg, and higher pressure gradients. On the days with the indicated atmospheric gradient frontiers, the heifer and cow insemination and milk yield control procedures with the analysis of the milk chemical composition were performed. It was ascertained that both cows and heifers demonstrated the highest conception rates at the first insemination (61.1 and 58%, respectively) on the days with the atmospheric pressure of 751–755 mm Hg. The maximum percentage of dry cows was registered during insemination of the animals on the indicated days. The highest daily milk yields were recorded in cows on the days of lactation, when the atmospheric pressure gradient did not exceed 775 mm Hg. Predominance of milk production over the milk yield obtained in the periods with the maximum atmospheric pressure comprised 3.1–3.6 kg (P > 0.99–0.999). The same trend could be observed in the dry matter content and the basic milk components. The survey outcomes show that conception rates and productive performance of the Red Steppe cattle are characterized by maximum values under the atmospheric pressure gradients (751–775 mm Hg) considered comfortable and suitable for animals. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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