Features of morphological and physiological development of calves depending on the process and biogeochemical conditions of the environment

The morphophysiological expediency of complex assignment to bulls at the beginning of periods of cultivation, rearing and fattening of the tested bioactive substances of natural nature taking into account biogeochemical features of the region is proved in the work. In this regard, scientific, economic and laboratory studies were carried out on 30 bulls-analogues, divided into three groups. Experimental animals from 2 to 150 days of age were kept by adaptive technology, and then up to 540 days (duration of observations) - by industrial technology. Bulls experienced groups on 2-, 31-, 151-, 361-iodine was used trepel with «Polistim» or iodomidol with selenopirane. Age dynamics of clinical and physiological state, body growth, morphometry of gonads and thyroid gland were studied in animals of the compared groups. In the simulated experiments, it was found that the complex administration of iodomidol and selenopiran to bulls was accompanied by more pronounced somatotropic and morphometric effects than in the appointment of trepel with «Polystim» according to the developed schemes.