УДК 636.2:636.083.1:591.11

GENERAL HABITUS AND PARAMETERS OF NATURAL RESISTANCE IN PREGNANT HEIFERS OF THE BLACK-AND-WHITE BREED AT THE DIFFERENT WAYS OF KEEPING

S.B. Yarantseva

The determinations of fodder eating, live weight gain, hematological and immunological indices have been made in pregnant heifers of the Black-and-White breed during their keeping both in a capital and facilitated type building. The pregnant heifers cultivated in conditions favorable for development of microflora have stronger immune response of an organism.

Key words: natural resistance, Black-and-White, pregnant heifers, cows, bactericidal activity, lisocymal activity, blood serum, raising youngsters in subzero temperature.

ГНУ Сибирский  научно-исследовательский
и проектно-технологический институт
животноводства
,
630501 Новосибирская обл., Новосибирский р-н,
пос. Краснообск-1, а/я 470,
e-mail: sibniptij@ngs.ru

Поступила в редакцию
6 июня 2008 года