Изменения в биохимическом составе и количестве соматических клеток в молоке коров в летний период содержания животных

Abstract

The aim of the work was to study the main biochemical parameters, including the measurements of the total amount of water-soluble antioxidants by the amperometric method, milk samples and the number of somatic cells in the milk of black-and-white cows in the summer period of animal keeping. In the work, the total amount of water-soluble antioxidants (TAWSA) was assessed by the amperometric method (on the TsvetYauza 01-AA device) and the average values of the component composition of milk for two groups of cows, which were formed by the number of somatic cells (NSC). Milk of mastitis cows causes food poisoning, that is why two groups were formed according to the NSC values: 1) less than 100 thousand units/ml; 2) from 100 to 700 thousand units/ml, in milk samples of black-and-white cows of the Moscow region that was used as raw material. The TAWSA values for 11 samples of milk from cows in group 1 ranged from 20,9 mg/g to 41,4 mg/g (average value 27,8±5,1 mg/g); mass fraction of fat (MFF) – 4,95±0,80%; protein mass fraction (PMF) – 3,13±0,27%; milk yield is about 20,5±4,1 L/day. Found correlations between TAWSA and the following parameters of milk: MFF – –0,25; PMF – +0,30; SOMO – –0,39; milk yield – +0,146. The TAWSA values for 16 milk samples of cows in group 2 ranged from 18,8 mg/g to 29,5 mg/g (average value 23,6±2,1 mg/g); MFF – 4.77±0.39%; PMF – 3,36±0,22%; milk yield about 20,0±3,1 L/ day. Found correlations between TAWSA and the following parameters of milk: MFF – –0,37; PMF – +0,11; SOMO – –0,32; milk yield – –0,12. The data obtained are of great importance both in assessing the physiological and biochemical status and the state of the antioxidant defense system of the cow’s organism.