Indicators of beef productivity when feeding targeted PVMC to fattening steers

Abstract

Targeted protein-vitamin-mineral concentrates (PVMC) based on domestic raw materials have been developed. The composition of protein-vitamin-mineral concentrates includes full-fat extruded soy, sunfl ower cake, feed tricalcium phosphate and vitamin-mineral complex. The purpose of the research was to study the indicators of meat productivity when feeding targeted PVMC to fattening steers. Amidoconcentrate additive and bentonite were introduced into experimental protein-vitaminmineral concentrates. After analyzing the chemical composition and nutritional value of the ration in the experimental PVMC-65K and PVMC-65KB, the content of a number of minerals was changed: iron, manganese, cobalt, etc. This made it possible to optimize the ration for these trace elements: reduce the excess of iron and manganese, as well as increase the content of copper and cobalt. During 5 months of fattening, the live weight of the steers of the control group increased by 136,4 kg, the 1st experimental group by 144,9 kg, and in the 2nd experimental group by 148,5 kg, which was more by 6,23 and 8,87 %, respectively. Feeding targeted PVMC-65K allowed to ensure the formation of good beef traits in animals. So, the steers of the 2nd experimental group compared with the herdmates of the control group had a greater pre–slaughter weight by 1,96 %, the carcass weight by 4,8, the internal fat mass by 12,59, and the carcass yield by 1,42 abs.%. The slaughter yield of the steers of the 1st experimental group was 53,23 %, and the 2nd it was 53,70 %, which was respectively 1,15 and 1,62 abs.% more than in the control group. The level of profi tability of beef production in the control group was 21,28 %, in the 1st experimental group it was higher by 9,06 abs.%, and in the 2nd by 14,36 abs.%.