Pirova L. Effect of different levels and sources of selenium in the diets on performance and content of heavy metals in products of slaughter of pigs

The dissertation presents the theoretical and experimental material for use in feeding young fattening pigs feed with different levels and sources of selenium. Revealed certain changes in productivity of young pigs and in meat quality. The estimation of morphological and biochemical structure of blood is done. Has been studied nutrient digestibility, nitrogen balance, calcium, phosphorus, iron, copper, zinc, manganese, cadmium, lead, mercury and selenium in the body of pigs depending on the level and sources of selenium. The expediency of balancing of diets on selenium has been proved and its optimum level feeding has been established. Has been shown influence of different levels and sources of selenium on efficiency, digestibility, morphological and biochemical indicators of blood, aminoacid structure of the longest muscle and content of heavy metals in products of slaughter of fattening pigs Large White breed. Has been recommended to use mixed fodder with a level of selenium of 0.3 mg/kg dry matter in organic form - Sel-Plex for young pigs of fattening. Key words: level, mixed fodder, pigs, digestibility, efficiency, selenium, sodium selenite, Sel-Plex, heavy metals.