FEATURES OF THE PROTEIN EXCHANGE IN THE YOUNG ORGANISM OF ABERDIN-ANGUSIAN BREED IN THE SUBSOLINE PERIOD
The features of protein metabolism in the body of young Aberdeen-Angus breed were studied in conjunction with the increase in live weight during the nursing period of postnatal ontogenesis. For the experiment formed on the principle of approximate analogues 2 experimental groups (n=20): 1 group-bulls, 2 group-heifers. It has been established that the live weight of young stock is gradually increases by 1,33 and 1,48 times, respectively, as a result of an increase in the percentage of albumin (on 21,48-26,59%, р<0,05), and globulins (on 11,01-12,41%, р<0,05). In the blood proteinogram, the number of а-1-globulins (in 2,40-10,33 times, р<0,05), в-1- globulins (on 52,78-56,00%, р<0,05) and y- globulins (on 39,55-44,55%, р<0,05) decreases with age, against the background of an increase in а-2- globulins (on 65,68-70,85%, р<0,05) and в-2- globulins (on 19,71-40,49%, р<0,05). During the suckling period, the level of urea on 18,34 (bulls) and 76,74% (heifer) in the blood of young animals increases, reflecting the efficiency of utilization of feed proteins in the rumen and the degree of assimilation of protein nitrogen in the body cells. Blood parameters positively correlate with the value of body weight; in gobies on 78,57%, in heifers on 75,00%. Reliable correlations in the group of bulls make up 64,28% and in the group of heifers-50,00% of their total number. Live weight, regardless of gender and age of the young, reliably correlates with the level of albumin in the blood (r=0,55±0,20 - 0,78±0,15 (bulls), r=0,56±0,20 - 0,64±0,18 (heifer), as well as albumin-urea ratio (in bulls r= -0,61±0,19 - 0,79±0,14; in heifers r= 0,62±0,18 - -0,72±0,16).