Beef productivity of steers of Bestuzhev breed when using an enzyme additive with including of microelements
Authors:   Kurgan State Agricultural Academy named after T. S. Maltsev – a branch of the Federal State Budgetary Educational Institution of Higher Education “Kurgan State University”, Russia, Kurgan region, Lesnikovo, Nazarchenko O. V. , Fenchenko N. G. ,   Bashkir Research Institute of Agriculture is a separate structural unit of the Federal State Budgetary Scientifi c Institution “Ufa Federal Research Center of the Russian Academy of Sciences”, Russia, Republic of Bashkortostan, Ufa, Khairullina N. I. ,   Bashkir Research Institute of Agriculture is a separate structural unit of the Federal State Budgetary Scientifi c Institution “Ufa Federal Research Center of the Russian Academy of Sciences”, Russia, Republic of Bashkortostan, Ufa, Sabitov M. T. ,   Bashkir Research Institute of Agriculture is a separate structural unit of the Federal State Budgetary Scientifi c Institution “Ufa Federal Research Center of the Russian Academy of Sciences”, Russia, Republic of Bashkortostan, Ufa, Shamsutdinov D. Kh. ,   Bashkir Research Institute of Agriculture is a separate structural unit of the Federal State Budgetary Scientifi c Institution “Ufa Federal Research Center of the Russian Academy of Sciences”, Russia, Republic of Bashkortostan, Ufa
Published: June 2024

The value of animals feeding should be provided them with nutrients, but also with biologically active substances such as microelements. Making the task of increasing the productivity of cattle, along with improving the genetic potential, the problem of insuffi cient or unbalanced feeding becomes of great importance. This problem can be solved by using biologically active additives. The purpose of the research was to study the beef productivity of Bestuzhev breed steers with using an enzyme additive containing microelements. The experimental part of the research was carried out at the breeding farm “Agrofi rm Pravda” in the Sterlibashevsky district of the Republic of Bashkortostan. For the experiment steers of the Bestuzhev breed were selected on the principle of analogous pairs and formed into three groups (control, 1st and 2nd experimental). In the 1st experimental group, 15 mg/kg of complete feed enzyme additive plus microelements (protoisotilin with proteolytic activity at a dose of 0,03 % of the dry matter of the ration) was added to the basic ration of steers. In the 2nd experimental group the enzyme amylosubtilin with amylolytic activity was used at a dose of 0,03 % of the dry matter of the ration and a mixture of microelement salts (potassium, cobalt, manganese and citric acid). It was found as a result that with the use of biostimulants for 45 days with 15-day breaks, there was an increase in the total live weight of steers and adipose tissue with a stable carcass weight, regardless of animal groups. The highest rates of slaughter yield were observed in steers of the 2nd experimental group 65,29 %, in steers of the 1st experimental group it was 64,16 % and slightly lower than the control group 63,10 %. The diff erence in comparison with herdmates in the control group was 2,19 and 1,06 %, respectively.