Authors:
R. S. ISKHAKOV, candidate of agricultural sciences, associate professor,
L. A. ZUBAIROVA, candidate of technical sciences, associate professor,
N. V. FISENKO, postgraduate student,
Bashkir State Agrarian University (34 50-letya Oktyabrya str., 450001, Ufa, Bashkortostan; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.).
Abstract. The article presents the research results on morphological and varietal composition of carcasses of black-and-white bull calves having alfalfa haylage with biological preservatives laksil and silostan in their diets. 45 black-and-white calves at the age of 9 months were selected to determine effects of fodder on beef production. The basic diet includes cereal hay, concentrated fodder, molasses and mineral additives. Feeding rate and housing conditions of bull calves were almost the same in all groups. The difference was that the bulls of the control group received a diet of alfalfa haylage without preservatives, while the animals of the I and the II experimental groups were given haylage preserved by laksil and silostan. Use of biological preservatives is found to increase weight of cold carcass by 9.8–15.1 kg, slaughter yield by 0.33 to 0.63 %. Carcasses of animals of the experimental groups look more advantageous in terms of edible and inedible parts as well. Content of valuable meat varieties in carcasses of the experimental bull calves was much higher compared to the control ones. Top grade meat in the experimental groups was more by 2.1 and 3.3 kg respectively, first grade meat was more by 5.8 and 8.7 kg. Thus, our studies demonstrated that feeding factor had a particular effect on synthesis of meat components. Preserved silage in the diet of grown bulls improves beef production of animals and increases meat quality.
Keywords: silage, biological preservatives, laksil, silostan, bull calves, meat production, morphological composition, varietal composition, beef.
