Abstract
The aim of reseach is to study the nutritional value of silages prepared using various biopreservatives, their effect on the digestibility of feed rations and the live weight gain of young cattle. Objectives: to analyze the nutritional value of prepared silages preserved with Yenisei microbiovit and Biotrof starter culture; to calculate the nutritional value of rations for 6-month-old bulls using experimental silages; to determine the average daily gains and feed digestibility coefficients in bulls during the experimental period. The study was conducted in 2022 at the Omskoye Scientific and Production Farm, a branch of the Omsk Scientific Research Center. The object of the study is fattening black-and-white bulls of the Vis Ideala 1013415 line, Apple Elevation 1491007 branch, dairy productivity direction, aged 6–9 months. Experimental variants: control (basic ration (BR) + silage of sorghum-sudak hybrid Navigator without preservative); experimental group I (BR + silage of sorghum-sudak hybrid Navigator preserved with biopreservative microbiovit Yenisei); experimental group II (BR + silage of sorghum-sudak hybrid Navigator preserved with biopreservative Biotroph). Silage with biopreservatives, introduced into the composition of feed rations, contributed to better digestion of feed nutrients, as well as an increase in the live weight gain of young cattle. The digestible protein indicators in experimental group I were 15.35 % higher than in the control, and in experimental group II this difference was 12.73 %. The average daily gains of bulls in experimental groups I and II were higher than in the control group of bulls by 8.8 % with microbiovit Yenisei and by 2.5 % with Biotrof. In groups of animals that ate feed with preserved silages, an increase in the digestibility coefficients was noted in comparison with the control group, while silage preserved with Yenisei microbiovit was digested better than that preserved with Biotrof, digestibility was greater for the following indicators: protein – by 1.4 %; fat – by 2.38; fiber – by 1.22 and BEV – by 0.85 %.
Published Version
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