Anatoly V Kharlamov, Elemes A Azhmuldinov

DOI: 10.33284/2658-3135-104-2-65

UDC 636.088:636.22/28.082.13

Comparative productivity assessment of the culled cows of various breeds, depending

on the methods of keeping and fattening time

 Anatoly V Kharlamov, Elemes A Azhmuldinov

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

 Summary. The article provides data on a comparative assessment of beef productivity of culled cows of the Red Steppe, Simmental and Hereford breeds, depending on the method of keeping and fattening time. In our study, six groups of cows were formed, two of each breed, 15 cows in each group. The first three groups of animals, including the aforementioned breeds, were kept tied, the other three - loosely on the site. The duration of the feeding period for cows was 30, 60 and 90 days. The data obtained indicate that there is a uniform increase in live weight over the feeding periods, which slightly decreases by the end of feeding. In general, over 90 days of feeding, the live weight of cows kept indoors on a leash increased by 66.0-82.6 kg, and when fattening on a platform without a leash - by 55.0-61.1 kg or 11.0- 21.5 kg less. When kept indoors on a leash, the largest increase in live weight was observed in the Simmental cows. They advanced over their peers of the Red Steppe breed by 16.6 kg, the Hereford - by 8.6 kg. Feeding cows on the site, there was no significant difference in the increase in live weight among cows of different breeds. The best full weight carcasses and the greater accumulation of raw fat were observed when the cows were fattened indoors on a leash. So, after 90 days of fattening, the weight of the paired carcass was 240.1-305.5 kg, and in cows fed on the site - 228.8-276.0 kg, or 11.3-29.5 kg less. The carcass yield of cows on a leash was 50.1-53.3%, without a leash - 48.9-54.4%. The highest rates of carcass yield and slaughter yield were observed in cows of the Simmental and Hereford breeds.

Key words: cattle, cows, ranking and culling of cows, Red Steppe breed, Simmental breed, Hereford breed, fattening, live weight, carcass weight, carcass yield, slaughter yield.

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 Kharlamov Anatoly Vasilyevich, Dr. Sci. (Agr.), Professor, Chief Researcher, Department of Technology for Beef Cattle Breeding and Beef Production, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 460000, Orenburg, Russia, 29, 9 Yanvarya St., tel.: 8(3532)30-81-78, e-mail: vniims.or@mail.ru

Azhmuldinov Elemes Azhmuldinovich, Dr. Sci (Agr.), Professor, Chief Researcher, Department of Technology of Beef Cattle Breeding and Beef Production, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 460000, Orenburg, Russia, 29, 9 Yanvarya St., tel.: 8(3532)30-81-78

 Received: 17 May 2021; Accepted: 15 June 2021; Published: 30 June 2021

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