Logacheva L. The natural resistance аnd productivity of the heifers and cows of simental and red-motley races in different abiotical factors in Woll - steppe conditios of Ukraine

Object of research - heifes and cows of different genetic types, the abiotical factors of environment.Purpose - studied the dynamics of the indices of paratipicals ( microclimate, the seasons of year, the air conditioning in winter), genetypical factors( different genetics types and races), age, its influence on the natural resistance, productive qualities of the animals.Results. The influence of the season year, the genetic type and the age of the heifers on their growth and their development, the morphlogical and biochemical indices of blood, humoral and cell factors of resistance were investigated. The manifistations of the genetic potencial of the new race is approashed under a high level of feeding and optimal condition of management of the positive influence on the immunological reactivity of animals. Changes of natural resistance indices in heifers and cows of different genetic types of the new race were researshed. The economic estimation of winter growth of heifers under the different levels of air conditioniry in Woll-steppe conditions of Ukraine it has been conducted.