Kosilov V.I, Nikonova E.A, Amirshoev F.S, Kayumov F.G, TretyakovaR.F.

Influence of admixture of the Kazakh white-headed cattle and the Herefords

of the Ural type on the nutritional value of meat products

Vladimir I Kosilov¹, Elena A Nikonova¹, Fayzullo S Amirshoev²,Foat G Kayumov³, Ruziya F Tretyakova³

¹Orenburg State Agrarian University (Orenburg, Russia)

² Institute of Animal Breeding, Tajik Academy of Agricultural Sciences (Republic of Tajikistan, Dushanbe)

³ Federal Research Centre of Biological Systems and Agricultural Technologies of the Russian Academy of Sciences (Orenburg, Russia)

Summary. Beef cattle breeding is an important source of high quality beef. This is due to the economic and biological characteristics of specialized meat breed cattle. During our study we formed 6 groups of calves and 3 groups of heifers, each consisting of 15 animals: I - Kazakh white-headed (control), II - ½ Hereford of the Ural type × ½ Kazakh white-headed, III - ¾ Kazakh white-headed × ¼ Hereford of the Ural type.

In the course of the study, it was established that crossing of the Kazakh white-headed breed with the Herefords of the Ural type has a positive effect on the concentration of nutrients in meat products obtained during the slaughter of young animals. It suffices to note that the crossbred bulls of the II and III experimental groups surpassed the purebred herdmates of the Kazakh white-headed breed of the I group in protein mass content by 0.61% and 0.31%, heifers - by 0.95% and 0.59%, steers - by 0.78% and 0.46%, extracted fat mass content - by 1.18% and 0.26%, 1.19% and 0.58%, 2.24% and 1.37%, respectively.

Key words: beef cattle breeding, bulls, heifers, steers, Kazakh white-headed breed, Ural type Hereford, crossing, nutritional and biological value of meat.

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Kosilov Vladimir Ivanovich, Dr. Sci. (Agr.), Professor of Department of Production Technology and Processing of Livestock Products, Orenburg State Agrarian University, 460014, Orenburg, Russia, 18 Chelyuskintsev, St. tel.: 8(3532)779328

Nikonova Elena Anatolyevna. Cand. Sci. (Agr.), Associate Professor, Department of Production Technology and Processing of Livestock Products, Orenburg State Agrarian University, 460014, Orenburg, Russia, 18 Chelyuskintsev, 460014, Orenburg, Russia, 18 Chelyuskintsev, St. tel.: 8(3532)779328, e-mail: nikonovaea84@mail.ru

Amirshoev Fayzullo Safarovich, Dr. Sci. (Biol.), Professor, Director of Institute of Institute of Animal Breeding, Tajik Academy of Agricultural Sciences, 734067, Dushanbe, Republic of Tajikistan, 17 Giprozem St., tel .: 810992372310607

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: vniims.or@mail.ru, nazkalms@mail.ru

Tretyakova Ruziya Foatovna, Cand. Sci (Biol.), 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: e-mail: kserev_1976@mail.ru

Received: 1 September 2020; Accepted: 14 September 2020; Published: 30 September 2020