Nutrient intake and nitrogen balance in rabbits at probiotic "Biogumitel" introduction in the diet

The main aim of research is to study the effect of different doses of probiotic-containing feed additive «Biogumitel» on the consumption of nutrients and nitrogen balance in the rabbit organism. The object of the study were rabbits aged 60 days. On the basis of which four groups of 10 animals each were formed. The rabbits of I (control) group consumed only a basic diet. Rabbits of II, III and IV (experimental) groups were added probiotic «Biogumitel» to the basic diet at a dose of 0.1 g; 0.2 g and 0.3 g, respectively, per 1 kg bodyweight. The study of feed consumption was carried out by weighing the feeds and their residues. Balance experience was carried out on three animals from each group at the age of 90 days. Rabbits from experimental group were characterized by a large consumption of feed, nutrients and energy. Thus, the advantage of the experimental group of rabbits over their peers in the control group by feed consumption was 0.29-0.65 kg (1.61-3.61%), fodder units was 0.33-0.74 units (1.59-3.57%), metabolizable energy -3.12-7.00 MJ (1.61-3.61%), dry matter - 0.25-0.56 kg (1.61-3.61%), crude protein - 0.05-0.11 kg (1.63-3.59%). It was estimated that the rabbits of the I group were characterized by the lowest feeding of nitrogen and its higher release with feces. At the same time, they differed in lower digestibility of nitrogen and were inferior to the peers from experimental groups by 0.14-0.33 g (3.23-7.82%). Intergroup differences in nitrogen digestibility resulted in unequal level of its deposition in the body, so the rabbits of the experimental group exceeded the control peers by the value of the studied indicator, by 0.06-0.23 g (2.93-11.06%). Utilization rates of nitrogen were higher in rabbits receiving a part of the diet of the investigated additive, from adopted at 0.48-2.57%, from the digested - at 0.88-1.49%. It was found that the use of probiotic feed additive «Biogumitel» had a positive effect on nitrogen deposition rates in the rabbit organism and on the coefficients of its use. Maximum values of investigated parameters were obtained while using the additive in a dose of 0.2 g/kg body weight.