ADAPTIVE CAPACITY OF STUD RAMS OF ASKANIAN MEAT AND WOOL BREED AND PARAMETERS OF SELECTION OF ZAKARPATTJA-TYPE PRECOCE BREED EWES FOR INTER-BREEDING
The rams of the Askanian meat-wool breed, grown and kept in the conditions of the steppe zone of the south of Ukraine, were investigated for their adaptive capacity and adaptation to the conditions of the lowland regions of Zakarpattja.
It was found that the physiological response of the rams to the maximum air temperature was characterized by a slight increase in body temperature and pulse, and a significant increase in respiratory rate per 1 minute. The good adaptive properties of the Askanian meat and wool breed rams are indicated by the high breeding capacity of ewes, at 97%, in both farms. The ewes of the breed prekos with a live weight of 55.9–58.9 kg were involved in the breeding process, and the Askanian rams with a live weight of 93.3–95.1 kg. It was studied the influence of crossbred crossing of crossbred Askanian sheep of meat and wool breed on the development of productive and reproductive features of Zakarpattja sheep ewes of the breed prekos with the purpose of obtaining mixed breeds with improved economic performance. It is proven by theory and practice that one of the main criteria for the rational management of sheep breeding in modern conditions is the study of individual features of growth and development of young sheep. In a market economy, increasing the meat productivity of sheep is an important factor that determines the level of economic efficiency of the industry. Obtained progeny at the age of 4–8 months had a higher intensity of growth. Thus, the average daily weight gain of lambs in the control group was 234 g, and experimental — 265 g, which is 11.3% more than in the control. The average daily weight gain of the bright control group was 205 g, and the experimental one — 244 g, which is 11.9% more than in the control group. At the age of 8 months, the fat mass of slaughtered animals ranged from 32–36 kg and the carcass weight was 15–18 kg with good fat irrigation.
The classification of sheep carcasses by fat irrigation according to the EUROP system corresponded to the average level of coverage of carcasses with fat, that is, the whole carcass was covered with a thin layer of fat, at the base of the tail — small accumulations of fat, the kidneys partially or completely covered with a thin layer of fat, with a slight fatty water between visible intercostal muscles .The balanced feeding of experimental animals had a positive effect on the increase in live birth weight and their viability. The minimum selection parameters of breeding sheep ewes, which are involved in the breeding process, are also set for obtaining animals with high multi-farrowing and combined productivity.
Golikov, A.N. (1985). Adaptacija sel'skohozjajstvennyh zhivotnyh [Adaptation of farm animals]. Moscow: Agropromizdat, 215 p. [in Russian].
Hulchii, M.M., Kureda V.I., Havrylenko H.S. (1978). Efektyvnist hirskoho vivcharstva [The effectiveness of mountain sheep farming]. Uzhhorod: Karpaty, 92 p. [in Ukrainian].
Kostin, A.P. (1958). K fiziologicheskoj vysotnoj akklimatizacii krupnogo rogatogo skota [To physiological high-altitude acclimatization of cattle]. Experience in the study of physiological functions. Proceedings of the Kuban Agricultural Institute, IV, 89–94. [in Russian].
Mykytyuk D. M., Lytovchenko A. M., Bilous O. V. et al. (2003). Instruktsiia z bonituvannia ovets [Sheep bonus instruction]. Instruction on breeding accounting in sheep and goat farming. Kyiv, 156 p. [in Ukrainian].
Paducheva, A.L. (1982). Reakcii adaptacii u ovec [Adaptation reactions in sheep] Adaptations at different levels of biological organization. Syktyvkar, 2, 98–115. [in Russian].
Plohinskij, N.A. (1969). Rukovodstvo po biometrii dlja zootehnikov [Biometrics Guide for Livestock Specialists]. Moscow. Kolos, 256 p. [in Russian].
Polska, P. I. (2004). Askaniiska miaso-vovnova poroda ovets z krosbrednoiu vovnoiu [Askanian meat-wool breed of sheep with crossbred wool]. Agrarian science production, p. 20. [in Ukrainian].
Sedilo, H.M., Vovk S.O., Havryliak V.V. (2016). Vivcharstvo Karpatskoho rehionu [Shepherding of the Carpathian region]. Lviv: Pais. 191. [in Ukrainian].
Stakan, G.A., Glazko V.I. (1982). Geneticheskij kontrol' formirovanija novoj porodnoj gruppy mjaso-sherstnyh ovec na rannih jetapah porodoobrazovatel'nogo processa [Genetic control of the formation of a new breed group of meat-wool sheep in the early stages of the breed-formation process]. Advances in theoretical and applied genetics. IciG, 187–189. [in Russian].
Stakan, G.A. Minina E.K., Glazko V.I., Lankin V.S., Rymaev I.V., Gorjachkin A.E. (1987). Sozdanie mjaso-sherstnyh ovec s krosbrednoj sherst'ju v Zapadnoj Sibiri [Creation of meat-wool sheep with crossbred wool in Western Siberia] Genetics and selection of animals. Novosibirsk: Nauka, 33–58. [in Russian].
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