CHARACTERISTICS OF LIVE WEIGHT GAINING RATES IN HOLSTEIN YOUNG CATTLE OF AUSTRALIAN SELECTION UNDER INTENSIVE GROWING TECHNOLOGY

This research was aimed at studying live weight gaining rates young Holstein cattle obtained from Australian selection cow line grown under intensive technology with elevated daily milk feeding rate with addition of probiotic Cellobacterin during the milk feeding period. The tests were held at Arteks-Agro Ltd., Kustchevsky District of Krasnodar Krai using progeny of Holstein breed cattle of Australian selection imported in 2008. The study was held in 2009 - 2011. Live weight was recorded on birth and then the animals were weighted every month before the morning feeding and watering. For the purpose of the test, calves were obtained from Reflection Sovereign line heifers and divided into 4 groups (n=128). Each group consisted of 32 calves: I - control; and II, III, IV - test groups divided into two subgroups of 16 male and 16 female calves each. Elevated milk feeding standard during the milk feeding period along with addition of probiotic had influence over the test young cattle growth and development; thus, it was found the maximum growth rate in both heifers and bull-calves was in the III Group. High growth rate was observed from 6 to 12 months age: in the III Group it was 907 g in heifers and 1,054 g in bull-calves; in the IV Group the rate was 898 g in heifers and 1,039 g in bull-calves. The highest growth rate in the I and II Groups was in heifers and bull-calves in the same period - 794 g and 807 g (heifers) and 893 g and 909 g in bull-calves) respectively. Analysis of the data leads to the conclusion that intensive growing had significant influence over the dynamics of the live weight gaining daily rates in test animals. Test groups exceeded control remarkably. At the same time, it is to be pointed out that animals in the III Group exceeded all other Groups in live weight growth daily rates, because they were fed with milk supplemented with probiotic Cellobacterin.

молодняк, выращивание, рост, развитие, живая масса, среднесуточный прирост, бычки, телки, энергия роста, пробиотическая добавка

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