Usachenko L. Metabolism processes, productivity and beef gualities of bull-calves under trace elements rations.

Subject of research: physiological and biochemical processes and productive gualities of bull-calves under the influence of deficient trace elements (J, Se2+, Co2+, Fe2+, Mn2+, Zn2+) in the forms of inorganic salts and methionates in dif-ferent correlations. The purpose of research: to find out the influence of microsupplement of deficient trace elements (J, Se2+, Co2+, Fe2+, Mn2+, Zn2+) in the forms of inorganic salts and methionates in different correlations in rations of bull-calves on their physiological state, growth, development as well as productive and beef gualities. Methods of the research: physiological, zootechnical, clinical, hematologic, biochemical and methimatical. Scientific novelty: new results of influence of deficient trace elements (J, Se2+, Co2+, Fe2+, Mn2+, Zn2+) in the forms of inorganic salts and methionates on metabolic processes in bull-calves bodies as well as their productive and beef gualities have been obtained. Subject and degree of Providing: To make prophylactic of young cattle in feeding - up period, increase their productivity and improve physical and chemical, as well as veterinary and sanitation indicies of meat we reccomend to carry out correction of their rations with chelates compounds (J, Se2+, Co2+, Fe2+, Mn2+, Zn2+) along with essential amino acids (methionine). Suggested: to carry out correction of mineral feeding of bull-calves by methionates of iodine, selenium, cobalt, iron, manganese and zinc. Developed: in PAF "Bilyj Stik" Sokal district of Lviv Region. Branch of Using: livestock with the deficient trace elements, physiology of cattle.