EFFECT OF DIFFERENT FACTORS ON THE COMPLEX EVALUATION OF RUSSIAN POLLED COWS
The effect of different factors on the complex evaluation of the Russian Polled cows has been studied. The regularities of the mother stock performance indices manifestation was examined by the use of mathematical methods. The scientific-economic experiments were conducted on the «Parizhskaya Kommuna» cattle breeding farm enterprise in Volgograd region. The object of the studies was Russian Polled heifers from 8 months of age up to the third calving and older ones. The animals were allocated into groups by their live weight and grade according to the rate of beef cattle breeding qualities evaluation. As result of the trials conducted it is found that the highest average daily gain – 560 g was in 8–18 months old elite-record heifers and those of the 2nd grade. The lowest results were observed in non-graded animals throughout all their life periods. The elite-record heifers surpassed the animals of the same age (8-, 15- and 18 months) from other groups. Moreover, the highly proved connection between live weight of 8-month old heifers with the same traits of heifers at the age of 12, 15 and 18 months, as well as milking capacity of the future cows after the second and third calving has been established. This certifies the fact that the live weight of heifers at the age of 8 months is the factor of cows' milking capacity and it is also a factor determining the milking capacity of cows in the future.