Influence of paraminobenzoic acid on productive and biochemical indicators of rabbits in the autumn season of the year

The aim of the study is to research the effect of para-aminobenzoic acid vitamin on productivity, total calcium content, inorganic phosphorus and protein fractions in the blood serum of silver rabbits in autumn in the conditions of the Krasnoyarsk Region. The object of the study was 20 rabbits aged 2–4 months, di-vided into control and experimental groups of 10 animals. The rabbits were kept in a private subsidiary farm of a rabbit farm in the village of Kamarchaga in the Mansky District in the Krasnoyarsk Region in open-air cages. The diet corresponded to feeding standards, the rabbits of the experimental group addi-tionally received para-aminobenzoic acid vitamin at a dose of 10 mg per 1 kg of live weight once a day for 10 days. The rabbits were weighed on the 1st and 11th days after the start of vitamin administration, and then the absolute average daily and relative live weight gain were calculated. On the 11th day, blood was taken to determine total calcium, inorganic phosphorus and protein fractions in the serum. The absolute average daily gain in live weight in the experimental group rabbits was 17 % (p < 0.05) higher at 2 months and 27 % (p < 0.05) higher at 3 months compared to the control group. The relative gain in live weight for the entire period was 18 % higher (p < 0.05) in the experimental group. The total calcium content in the blood serum of the experimental rabbits was 5 % (p < 0.01) higher at 2 months and 15 % (p < 0.001) hi-gher at 3 months. The proportion of β-globulin fraction of proteins in the experimental group was 1.5 % (p < 0.05) higher at 2 months and 3.3 % (p < 0.01) higher at 4 months. Also in the experimental group, an increase in the proportion of γ-globulins by 5.8 % (p < 0.05) at 2 months and by 3.6 % (p < 0.05) at 3 months was observed.