PECULIARITIES OF GROWTH AND DEVELOPMENT OF PUREBRED YOUNG ANIMALS OF ABERDEEN-ANGUS BREEDS AND THEIR HYBRIDS

Peculiarities of growth and development of purebred and crossbred young animals of Aberdeen-Angus breed indicate the advantage of young Aberdeen-Angus and Aberdeen × Black-motley hybrids over their coevals of Black-motley breed. High-energy feeding of young Aberdeen-Angus animals in the period from on eyear to 18 months compared to the midlevel revealed the advantages of productive qualities of purebred animals in order to obtain product competitive produce for climatic and economic conditions of floodplain agriculture Pripyat Polesie.The greatest live weight had Aberdeen × Black-motley calves - 29 kg against 25 kg (16 %) of the Black-motley and 20,9 and 21,9 kg (38,8 %) - of Aberdeen Angus. At the age of six months a higher body weight (183,0 kg and 178,1 kg) had a purebred Aberdeen-Angus steers, which are superior to their coevals of Black-motley breed by 27,6 kg, or 17,8 %, 22,7 kg or 14,6 %, and by 19,8 kg (12,3 %) and 14,9 kg (9,2 %) - of crossbred steers. Crossbred young animals obtained by mating Black-motley cows with bulls of Aberdeen-Angus breed by weaning at the age of 6 months reached the live weight of 163 kg, exceeding the figure of their coevals in the control group kept on manual watering by 7,8 kg, that made 5,0 %. The highest growth energy and average daily weight gain in milk period (from birth to 6 months) on the level of 889 g and 853 g was shown by Aberdeen-Angus steers. They exceeded in this indicator their Black-motley coevals by 24,8 %, or 177 g, 19,8 % or 141 g, and the crossbred steers - by 20,8 %, or 153 g, 15,9 % or 117g. During the period from 12 to 18 months at a high level for feeding this group animals showed the highest daily weight gain among all groups, it made 1011 g, which was higher by 124-362 grams, or 13,9-55,8 %. Over the entire growing period (0-18 months) the highest growth rate was in purebred Aberdeen-Angus animals and amounted to 181,2, and 182,6 %, which is 5,0 and 6,4 %, 6,9 and 8,3 % higher than that of Black-motley and crossbred animals.

growth and development, cattle, young animals, steers, Black-motley breed, Aberdeen-Angus breed, hybrids, body weight, average daily weight gain

1. Амерханов, Х. А. Современное состояние и перспективы развития мясного скотоводства в России / Х. А. Амерханов, Ф. Г. Каюмов // Вестник мясного скотоводства : материалы междунар. науч-практ. конф. - Оренбург, 2008. - Вып. 61, т. 1. - С. 3-9.

2. Рекомендации по ведению мясного скотоводства в Беларуси / Н. А. Попков [и др.]. - Мн., 2009. - 79 с.

3. Козырь, В. С. Мясные породы скота в Украине / В. С. Козырь, Н. И. Соловьёв. - Днепропетровск : ЗАТ «Полiграфiст», 1997. - 325 с.

4. Зелепухин, А. Г. Мясное скотоводство / А. Г. Зелепухин, В. И. Левахин. - Оренбург : ОГУ, 2000. - 350 с.

5. Ростовцев, Н. Ф. Промышленное скрещивание в скотоводстве / Н. Ф. Ростовцев, И. И. Черкащенко. - М. : Колос, 1971. - 280 с.

6. Нормы и рационы кормления сельскохозяйственных животных : справ. пособие / А. П. Калашников [и др.]. - 3-е изд., перераб. и доп. - М., 2003. - 426 с.

7. Рокицкий, П. Ф. Биологическая статистика / П. Ф. Рокицкий. - Мн. : Вышэйшая школа, 1973. - 318 с.