Improving the productive traits of steers when using selenium-containing feed additives in their rations

Abstract

Currently, there is great interest in the use of selenium preparations in animal husbandry. Chickpeas are high in selenium and protein. The feed additive benut made on the basis of chickpeas has a high content of selenium. At the same time, an active interaction of selenium with proteins was revealed. In this regard, the study of the beef productivity of steers when using the drug DAFS-25 in the ration separately and together with the feed additive benut is important and relevant. The purpose of the work was to increase the meat productivity and quality of beef of steers when using the selenium-containing drug DAFS-25 in rations separately and in combination with the high-protein feed additive benut. In the experiment, the steers of the 1st control group received the main ration (MR); the 2nd experimental – MR + DAFS-25 (1,6 mg/kg of concentrates); the 3rd experimental – MR + 0,5 kg of benut feed additive (0,5 kg/head/day) instead of an equivalent amount of concentrates + DAFS-25 to ensure the content of selenium, as in the ration of animals of the 2nd experimental group. The beef productivity of fattened steers of Aberdeen Angus breed, indicators of blood composition, digestibility and assimilation of feed nutrients, beef quality and effi ciency of its production were studied. The economic evaluation of the research results showed that on average 1 head additional costs from the use of selenium-containing additives amounted to 140,6 rubles in the 2nd experimental group and 138,7 rubles in the 3rd experimental group. The use of these additives made it possible to reduce the prime-cost of 1 c of growth in the 2nd experimental group by 24,9 and the 3rd group by 265,8 rubles. Profi ts from the sale of beef in the 2nd experimental group were received by 84,4 rubles more and in the 3rd group by 574,8 rubles more than in the 1st control group. In the 2nd and 3rd experimental groups the level of profitability increased by 1,2 and 13,2 abs.% compared with the 1st experimental group, where it amounted to 27,3 %.