Кажгалиев Н. Ж

GROWTH AND DEVELOPMENT AND ACCLIMATIZATION OF HEIFERS OF THE THIRD GENERATION OF THE ABERDEEN-ANGUS BREED

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Дата	04.01.2022
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Кажгалиев Н.Ж

Summary

GROWTH AND DEVELOPMENT AND ACCLIMATIZATION OF HEIFERS OF THE THIRD GENERATION OF THE ABERDEEN-ANGUS BREED

N.Zh. Kazhgaliev, T.I., T.I. Kulmagambetov, Zh.E.Titanov, M.K. Abdollaev, N.K.Akimzhan S.Seifullin Kazakh Agro Technical University

Summary

This article describes the research materials on adaptation and breeding of the aberdeen-angus breed of the third-generation calves in the conditions of the farm "Zholdasbay-Agro" of the North-Kazakhstan region. According to the results of study, the frequency of the development of antenatal hypotrophy in the newborn calves of the aberdeen-аngus breed of the Canadian selection on the totality of clinical signs was 12.3%, and in European calves - 8.7%.

In terms of growth intensity up to 3 months of age, third-generation heifers obtained from European selection outperformed canadian selection peers by 3.9 kg (p<0.05), and heifers from 3 to 6 and 6 to 8 months of age obtained from canadian selection outperformed their European selection peers by 3.8 kg (p<0.04) and 6.5 kg (p<0.01), respectively. A high growth rate of heifers obtained from canadian selection cows was established starting from 3, 6 and 8 months, which is associated with their higher adaptive capacity compared to European selection heifers.

Key words: Physiological adaptation, Canadian selection, European selection, growth and development, third generation, аberdeen-аngus breed, normotrophic, hypotrophic, coefficient of katabolism.

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