Amash I Otarov, Foat G Kayumov, Ruziya F Tretyakova

DOI: 10.33284/2658-3135-104-2-56

UDC 636.088.31(470.64)

Assessment of beef productivity and quality of bulls of different genotypes in the foothill

and mountain zones of the Kabardino-Balkarian Republic

Amash I Otarov1, Foat G Kayumov², Ruziya F Tretyakova2

1Institute of Agriculture - a branch of the Federal State Budgetary Scientific Institution «Federal Scientific Center «Kabardino-Balkar Scientific Center Russian Academy of Sciences» (Nalchik, Kabardino-Balkarian Republic, Russia)

2Federal Research Centre for Biological Systems and Agricultural Technologies of the Russian Academy of Sciences (Orenburg, Russia)

Summary. The article presents an analysis of the beef productivity of crossbred bulls (Angus × Kalmyk), (Angus × red steppe) from birth to 18 months of age of the first generation in a comparative aspect with purebred Kalmyk bulls in the conditions of the breeding enterprise LLC "Malka" Zolsky district of the Kabardino-Balkarian Republic (KBR).

As a result of the experiment, 3 groups of bulls, 12 in each, were formed according to the principle of analogues: Group I - crossbred bulls Aberdeen-Angus × Kalmyk; II - Aberdeen-Angus × red steppe; III - control, it contained purebred Kalmyk analogues.

According to the results of control weighing, bulls of group I at all stages of rearing had an advantage over analogues of groups II and III. So, at 3 months of age, the superiority over peers was 11.2 kg (10.53%) and 22.6 kg (27.0%), at 8 months of age - 4.5 kg (2.4%) and 8.4 kg (4.63%), at 18 months - 29.2 kg (6.1%) and 40.3 kg (9.2%).

According to the average daily gain from birth to 18 months. Bulls of group I had an advantage over animals of groups II and III by 58.3 g (7.5%) and 69.2 g (9.04%), respectively.

The analysis of the results of the conducted studies showed the superiority of the experimental bulls of the I group in terms of the studied parameters of beef productivity. Thus, hot carcasses were obtained from those, that were heavier than their peers in groups II and III by 15.3 kg (6.16%) and 23.1 kg (9.60%). The slaughter weight was higher by 16.1 kg (6.47%) and 22.6 kg (9.33%). The highest slaughter yield was 60.2% for hybrids of group I, 58.1 and 58.6% for II and III.

Key words: bulls, Kalmyk breed, Aberdeen Angus breed, Red Steppe Breed, crossbreeds, live weight, average daily gain, meat quality, control slaughter, chemical сomposition, biological composition, Kabardino-Balkarian Republic.

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Otarov Amash Iskhakovich, Cand. Sci. (Vet.), Senior Researcher of the Laboratory of Livestock and Forage Production of the Institute of Agriculture - a branch of the Kabardino-Balkarian Research Center of the Russian Academy of Sciences (ISKh KBSC RAS), 224 Kirov St., Nalchik, Kabardino-Balkarian Republic, 360004, tel .: 89280791053, e-mail: kbniish2007@yandex.ru

Kayumov Foat Galimovich, Dr. Sci (Agr.), Professor, Head of Research, Head of the Laboratory for New Breeds and Types of Beef Cattle, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 460000, Orenburg, Russia, 9 Yanvarya St., 29, tel.: 8(3532)30-81-76, cell.:8-987-341-75-80, е-mail: fncbst@mail.ru, nazkalms@mail.ru

Tretyakova Ruziya Foatovna, Cand. Sci (Biol.), Junior Researcher, Beef Cattle Breeding Department, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 460000, Orenburg, Russia, 9 Yanvarya St., 29, tel.: 8(3532)30-81-74, e-mail: fncbst@mail.ru

Received: 25 May 2021; Accepted: 15 June 2021; Published: 30 June 2021

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