Peculiarities of the body of a young sheep under biophysical methods of exposure

Abstract

Aim. Study the effect of low-intensity laser radiation on the genotype's young sheep (poll Dorset x North Caucasian meat-wool) and their exterior. Material and Methods. Zootechnical, biophysical, statistical and other methods were used in research. Experimental animals were exposed to an STP laser apparatus, the action of which is based on the use of low-intensity laser radiation in the infrared region of the spectrum. The study of measurements of animals at the age of 5 and 7 months was carried out and physique indices were calculated. Results. Comparing measurements in the studied animals at 5 months of age revealed the advantage of lambs of groups II and III over the control, in almost all main parameters. However, the experimental groups' young animals were characterized by higher rates of breast measurements. Thus, the superiority of lambs of groups II and III over animals of the control group were: in chest depth 2.1-3.3%, width – 4.4-7.1%, girth – 1.2-4.1% (P < 0.001). A similar trend was established due to measurements of the studied animals' physique at the age of 7 months. At the same time, a clear advantage in terms of measurements characterizing breast development was found in young animals of the second and, especially, in the third group: in chest depth by 3.8-7.4%, width by 4.8-9.1%, girth – 3,7-9.0%, with a significant difference (P < 0.05; P < 0.001). It was also found that the greatest value of the breast index at 5 months of age was typical for animals of groups II and III (77.6-78.6%), which is 1.8-2.8 abs. percent (P < 0.001). However, with age, the difference in the value of this indicator between the groups decreased. Therefore, at the age of 7 months, young animals of groups II and III surpassed animals of group I in this indicator by 0.8-1.5 abs. percent. Conclusion. Thus, it was found that the best ratio of most body articles and body build indices, characterizing them as animals with well-pronounced meat forms, were animal groups II and III.