The hygienic and nutritional quality of milk from Saanen goats bred in the Moravian-Silesian region
¹Czech University of Life Sciences Prague, Faculty of Agrobiology, Food and Natural Resources, Department of Chemistry, Kamýcká 129, CZ165 21, Prague, Czech Republic
²Dairy Research Institute Ltd, Ke dvoru 791/12A, CZ160 00, Prague, Czech Republic
The aim of the study was to monitor milk yield and the hygienic and nutritional quality of milk of Saanen goats in the Moravian-Silesian region in Czech Republic. Milk samples were collected once a month during the lactation period. The average milk yield in the standardized lactation was 1,100 liters. The somatic cell count in pool samples ranged from 470 x 103 to 696 x 103. The total microorganism count ranged from 3.6 x 103 to 1.4 x 105. The pathogen Staphylococcus aureus was proven no more than in 6.3%. The highest values of all main components of milk were achieved within a relatively short time after kidding (April 2015). The average content of fat was 3.64 0.52 g 100 ml-1, 3.17 0.16 g 100 ml-1 of protein, 2.60 0.06 g 100 ml-1 of casein, 4.56 0.24 g 100 ml-1 of lactose, and 12.02 0.80 g 100 ml-1 of solids. Average content of vitamin A was 0.27 0.14 mg kg-1 and average content of vitamin E was 0.60 0.34 mg kg-1. Content of vitamin E increased almost continuously during the lactation, and the content of vitamin A was significantly higher at the end of lactation. In lyophilized milk powder the average trace metal contents were 7.76 0.92 g kg-1 Ca, 1.62 0.26 g kg-1 Mg, 15.3 1.43 g kg-1 K, 789 111 mg kg-1 Na, 23.2 2.73 mg kg-1 Zn, and 0.85 0.55 mg kg-1 Cu. Contents of minerals varied during the lactation period, but no significant trends were observed.