The aim of the study is to determine the effect of the lactulose-containing prebiotic feed additive Vetelact on the meat productivity and meat quality of Californian rabbits. Objectives: to study the meat productivity, morphological and varietal composition of rabbit carcasses; to study the development of internal organs and their morphometric features; to determine the chemical composition and calculate the energy value of rabbit meat; to determine the amino acid content in rabbit meat and to calculate the amino acid score of the meat protein of rabbits in the experimental groups. The studies were conducted at the zoo farm of the Institute of Rabbit and Veterinary Medicine, the Department of ZiTPPZH and the Research Center of the Krasnoyarsk State Agrarian University. The experimental design consisted of the following options: control group (CG), the first experimental group – CG + 0.1 ml (prebiotic) per 1 kg of live weight, the second experimental group – CG + 0.2 ml/kg of live weight. Lactulose had a beneficial effect on the meat productivity and meat quality of rabbits in the experimental groups. The first and second experimental groups showed an increase in the weight of a fresh carcass – from 98.67 to 250.33 g, skin – from 25.00 to 45.34 g, slaughter yield – from 1.65 to 3.88 %, carcass pulp weight – from 92.67 to 203.67 g, pulp yield – from 0.87 to 1.74 %, heart weight – from 0.95 to 1.58 g, liver – from 0.10 to 0.22 g, kidneys – from 1.01 to 2.74 g and lungs – from 1.07 to 1.87 g, protein mass fraction – from 0.57 to 0.64 %, fat – from 0.06 to 0.10 %, energy value of meat – from 11.76 to 19.92 kJ, the amount essential amino acids – from 2.87 to 3.85 g and replaceable amino acids – from 2.37 to 2.96 g compared to the control group.
Lefler et al. (Fri,) studied this question.