DIGESTIVE PARAMETERS OF PUREBREED SHEEP AND THEIR HYBRIDS WITH ARGALI

The aim of researches is to develop physiological bases of sheep productivity through improved adaptive capacity of the organism. In comparative aspect the peculiarities of the digestive processes in sheep of different genotypes: the domestic sheep and their hybrids with argali. The experiments were carried out in L. K. Ernst Institute of Animal Husbandry in tree groups of sheep of different origins (n=3) with a rumen fistula. Animals of group I – sheep-valukh the Romanov breed II – the hybrids of the second generation ewes of the Romanov breed with argali (25% of kinship) and III – hybrids of the third generation of Edilbaj breed (50% of kinship), of the Romanov breed (37.5% of kinship) and argali (12.5% of kinship). Higher feed intake was observed in hybrid animals. So, consumption of dry matter in the second group it was higher by 14.6%, the third with 15.4%, compared to the control, obviously, was determined breed differences in the intensity of the digestive processes. Set that the origin of the animals affects the orientation of enzymatic processes. In the proventriculus hybrid animals it was more intense compared with the number purebred. This is evidenced by a statistically significant increase in hybrid animals of the concentration of volatile fatty acids (12-21.6% to nursing and 8.7-12% after nursing), a significant increase of amylolytic activity of the rumen fluid (1.5-2.04 E/ml), some reduction in the ammonia concentration. Had higher content of total quantity of microbial mass in the hybrids of the Romanov sheep and argali compared to purebred sheep-valukh (227.1-258.0 mg/100 ml). Of further interest is the comparative study of digestive and metabolic processes at hybrid animals for the op for determining the optimal type and structure of diets.

ruminants, hybrids, scar, digestion, enzyme, processes