Physicochemical analysis of raw milk of Prim'holstein cows in the region of Mitidja in Algeria

摘要

Milk is considered as nature’s single most complete food and is one of the most valuable and regularly consumed foods. Physicochemical parameters of raw milk are of great importance in the assessment his quality. But, in Algeria, little studies have been conducted to assess the physicochemical quality of raw milk produced specially by cows after importation. This study was conducted to evaluate the physicochemical quality of raw milk of Prim’holstein breed from Mitidja region in Algeria. During March and April, 64 samples of raw milk were taken on 32 Holstein cows. Gerber acid-butyrometric and Bradford methods were used to calculate the milk fat and protein content, respectively. The density was measured using a thermo-lactodensimeter at 20°C and dry matter was obtained by drying by evaporation of milk. Physicochemical results showed fat 31.0±1.9 g/L, protein 29.1±0.6 g/L, density 1.03±0.002, dry matter 118±6 g/L, and defatted dry matter 87.0±0.8 g/L. Statistical analysis of data revealed that there is a significant correlation between fat and protein (p˂0.05) and dry matter with fat and defatted dry matter (p˂0.001). These results show that the physicochemical quality of raw milk of Prim’holstein breed imported in Algeria is lower than in the country of origin.