Abstract
Aim. To study the feasibility of using feed additives containing powdered feed preparations with different lactulose content in the amount of 5 g/kg of extruded compound feed together with the main diet in terms of the effect on the quality indicators of raw materials and the natural resistance of the body of experimental rabbits. Materials and Methods. The effectiveness was evaluated after the control slaughter at the age of 150 days in the number of 5 heads from each group. The change in live weight was determined when the rabbits reached the age of 75, 105, 135 and 150 days by weighing on an electronic scale. The physiological state and resistance of rabbits were evaluated by hematological parameters. The obtained materials were processed by the methods of variation statistics. Results. The analysis of dynamics of changes of alive weight of animals showed that feed supplementation with lactulose had a positive impact on the growth of animals the live weight of rabbits in groups I and II were greater at 3.8 and 6.2% absolute increase in live weight during the period of experience increased by 5.3 and 7.9%, respectively, compared to control. At the same time, the effect of supplements on blood parameters should also be noted. In our studies, the rabbits of the experimental groups had an advantage over the rabbits of the control group in terms of the level of red blood cells by 0.94·1012 g/l (18.7%) and 1.12·1012 g/l; white blood cells - by 0.50·109 (7.2%) g/l and 0.59·109 g/l (8.5%), respectively. The level of hemoglobin in the blood of rabbits increased by the end of the experiment in the control group by 3.7%, in I – by 12.5%, in II – by 15.9%. Conclusion. Based on the presented results, it can be concluded that the data on quantitative changes in blood were due to the influence of feed additives, which contributed to an increase in the natural resistance of rabbits, and the best indicators were achieved by rabbits of the II experimental group.
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