Meat productivity and meat quality of purebred and crossbred lambs

Introduction Currently, sheep farming, as a sub-branch of animal husbandry, is focused on the production of young mutton; therefore, special attention is paid to the use of meat and meat-fat breeds of sheep for these purposes. The level of production of young mutton is significantly influenced by the breed, sex of animals, feeding conditions and maintenance. In this regard, the meat-and-fat fat-tailed Edilbaev breed, as well as the imported meat breed Dorper, deserves attention. These breeds have a high growth rate and high quality indicators of meat and fat. An important component of increasing the meat productivity of sheep is industrial crossing. Considering the above, research on the crossing of domestic meat-and-fat fat-tailed queens with highly productive meat sheep of imported breeding, i.e. dorpers, is becoming relevant.
Object. The object of research was purebred and crossbred sheep. The experiment was conducted on young animals of the Edilbaevsky breed and obtained from mating sheep of the Edilbaevsky breed with sheep of the Dorper breed.
Materials and methods. The research was conducted in the conditions of IP KFH Shangeraev M. G. To establish the efficiency of lamb production from purebred and crossbred young animals, 2 groups of sheep with 30 heads each were selected: purebred Edilbaevsky and crossbred animals obtained from mating sheep of the Edilbaevsky breed with sheep of the Dorper breed. The selection of animals and the recruitment of groups were carried out using the method of balanced groups of analogues (Ovsyannikov A. I. «Fundamentals of experimental business», 1976) Unified methods was used for laboratory and zootechnical research. Statistical processing of the digital research material was performed using the Microsoft Excel program. Statistical significance was assessed using the Student's t-test.
Results and conclusions. Over the entire research period from birth to 7 months of age, the superiority of the Edilbai-Dorper crossbreeds in live weight was 5.5 kg or 11.07% compared with their purebred peers. Crossbred sheep significantly outperformed purebred ones in absolute growth – by 27.2 g or 13.01%. Edilbai-Dorper sheep have saved 0.68 energy feed units and 52.7 g of digestible protein per 1 kg of live weight gain compared to purebred Edilbai sheep. A significantly high difference in favor of crossbred sheep was established by the slaughter weight of 3.53 kg or 14.83% (P<0.01). The meat ratio in crossbred animals was 3.88 versus 3.75 in purebred peers.

1. Aduchiev B. K., Pogodaev V. A., Sergeeva N. V. Meat productivity of sheep obtained from crossing sheep of the Stavropol breed with sheep of blood type ½ Kalmyk kurdyuchnaya and + ½ dorper. Zootechnia. 2021. No 1. Pp. 35-39.

2. Bazaev S. O., Yuldushbaev Yu. A., Arilov A. N. Qualitative characteristics of meat of Kalmyk fat–tailed sheep of their crossbreeds with sheep- producers of the dorper breed. Izvestiya Orenburg SAU. 2020. No 5 (85). Pp. 223-226.

3. Davletova A. M., Kosilov V. I. Slaughter indicators of sheep of Edilbaevsky sheep. Sheep, goats, wool business. 2013. No 3. Pp. 66-69.

4. Dvalishvili V. G. Productivity of the dorper meat breed in Russia. Problems and prospects of improving the efficiency of livestock breeding and feed production: collection of articles of the XII International Scientific and Practical Conference. Tver, 2021. Pp. 64-67.

5. Kolosov Yu. A., Degtyar A. S., Gulko A. E. Growth and development of young animals obtained from crossing queens of the Soviet Merino breed and sheep of the Dorper Breeding and technology of livestock production: materials of the International Scientific and Practical Conference. Persianovsky, 2021. Pp. 25-28.

6. Lushnikov V. P., Molchanov A. V., Ramzov I. A. Meat productivity of sheep of the Edilbaev breed of different colors with different sizes of the kurdyuk. Sheep, goats, woolen business. 2017. No 4. Pp. 22-24.

7. Molchanov A. V., Egorova K. A., Lysova K. V. The use of Dorper sheep in various crossing variants in the production of young mutton. Current problems of veterinary medicine, food and biotechnology: materials of the International Scientific and Practical Conference. Saratov, 2022. Pp. 483-487.

8. Pogodaev V. A., Sergeeva N. V., Yuldashbaev Yu. A., Erokhin A. I., Karasev E. A., Magomadov T. A. Economically useful qualities and biological features of sheep obtained from crossing Kalmyk kurdyuchnaya and Dorper breeds in the conditions of the arid zone of Kalmykia. Proceedings of the Timiryazev Agricultural Academy. 2019. No 4. Pp. 58-76.

9. Saenko A. Yu. Meat productivity of young animals of the Edilbaevsky breed and its hybrids with the Dorper breed. Sheep, goats, woolen business. 2022. No 4. Pp. 30-33.

10. Sergeeva N. V. Dorper – promising meat work. Animal husbandry of the South of Russia. 2016. No 7 (17). Pp. 19-21.

11. Chamurliev N. G., Shperov A. S., Shangeraev G. M., Manzhosov V. I. Weight growth and slaughter qualities of purebred and crossbred sheep. Agrarian and food innovations. 2022. No 2 (18). Pp. 37-45.

12. Yuldushbaev Yu. A., Kosilov V. I., Traisov B. B., et al. Economic and biological features of sheep of the Edilbaev breed. Bulletin of meat cattle breeding. 2015. Vol. 4. No 92. Pp. 50-57.