THE INFLUENCE OF INDIVIDUAL PARATYPIC FACTORS ON THE PRODUCTIVITY OF YOUNG ABERDEEN-ANGUS CATTLE DURING THE GRAZING PERIOD

The article highlights the results of determining the influence of individual paratypic factors on the productivity of young Aberdeen-Angus cattle during the grazing period. It was found that with a grazing period of 120 days and the diet without concentrated feed of young cattle, the average live weight of bulls and heifers at weaning at 7 months was 179.3 and 176.4 kg, while the average daily gains were at the level of 740.7 and 737.8 g, respectively. When assessing young cattle during breeding, 15.4% (22 heads) of bulls and 26.8% (34 heads) of heifers were classified as eliterecord class by live weight, 11.2% (16 heads) and 13.4% (17 heads) were classified as elite class, respectively. In terms of the number of heads with the highest classes, heifers had an advantage compared to bulls. 59 bulls and 45 heifers were of class I and II. At the same time, 32.1% of bulls and 24.4% of heifers did not meet the minimum requirements of class II and were classified as unclassified. It was found that the largest number of bulls of the elite-record and elite classes were born in May (35%), March and June (27.8%). A similar pattern is observed in heifers: the best of them in the breeding sense were born in May (75%), March (39.7%) and June (35.7%). In general, the high adaptability of Aberdeen-Angus animals, without additional costs for concentrated feed, creation of cultivated pastures and mowing of green mass for feeding, makes it possible to obtain bulls at the age of 7 months, depending on the month of birth, with a live weight of 173.1–182.4 kg and heifers – 168.8–193.4 kg at the level of average daily gains of 710.2–755.9 g and 699.2–822.4 g, respectively.