Kinispay Dzhulamanov, Nikolay Gerasimov

Evaluation of the efficiency of feed use by young Hereford cattle

of different ecological and genetic groups

DOI: 10.33284/2658-3135-103-1-134

UDC 636.084.1:636.085.55

Acknowledgements:

Research was carried out according the plan of research scientific works on 2019-2021 yy. FSBSI FRC BST RAS (No 0761-2019-0012)

Evaluation of the efficiency of feed use by young Hereford cattle

of different ecological and genetic groups

Kinispay M Dzhulamanov, Nikolay P Gerasimov

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

Summary. The development of highly efficient beef cattle is a priority task of selection and breeding work in cattle breeding. The aim of our work is a comparative description of young Hereford animals of different ecological and genetic groups in terms of feed efficiency. The studies were carried out on bulls and heifers of th Hereford breed, representing the groups of the Ural Hereford, Canadian breeding and their crosses. To assess the efficiency of feed use, the expected dry matter intake of animals was determined by solving multiple regression, taking into account the actual dry matter intake, average daily gain and metabolic body weight. The level of feeding of young animals was quite high, and the composition of diet in structure and energy value completely satisfied animal organism in all types of nutrients. Bulls and heifers of Canadian selection were significantly superior to their peers in terms of weight growth of 15 months. 40.0-58.8 kg (8.80-13.51%; P≤0.001) and 20.2-37.1 kg (5.27-10.12%; P≤0.001), respectively. As a result, models were identified to describe the predicted feed intake. Using the obtained models, indicators of residual feed intake (RFI) were established. Animals of foreign origin were characterized by better efficiency of feed use (-0.043 kg for bulls and -0.049 for heifers), based on the difference between actual and expected dry matter consumption. Young cattle of Russian selection was significantly inferior (by 0.077-0.092 kg of dry matter per day; P≤0.001) to Canadian animals in terms of the studied indicator. The inclusion of this parameter in breeding programs will create highly effective herds of beef cattle and increase the profitability of beef cattle breeding.

Key words: bulls, heifers, Hereford breed, feeding, weight growth, feed intake, dry matter, feed efficiency.

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Dzhulamanov Kinispay Murzagulovich, Dr Sci. (Agr.), Head of the Laboratory for Beef Cattle Breeding, Federal Research Centre of Biological Systems and and Agrotechnologies of the Russian Academy of Sciences, 460000, Orenburg, Russia, 29 9 Yanvarya St., cell: 8-987-840-49-28, e-mail: kinispai.d@yandex.ru

Gerasimov Nikolay Pavlovich, Cand. Sci. (Agr.), Senior Researcher, Beef Cattle Breeding Department, Federal Research Centre of Biological Systems and and Agrotechnologies of the Russian Academy of Sciences, 460000, Orenburg, Russia, 29 9 Yanvarya St., cell: 89123589617, e-mail: nick.gerasimov@rambler.ru

Received: 13 March 2020; Accepted: 16 March 2020; Published: 31 March 2020

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