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Zhodnocení vybraných ukazatelů složení mléka v průběhu laktace u ovcí plemene cigája
Bartoň, Petr
This master’s thesis evaluates selected indicators of the quality of sheep milk and its components. The sheep of the selected Tsigai breed are bred in the northern part of Zapadni Tatry in Slovakia. As a part of the thesis pool samples of sheep milk were collected at periodic intervals. The pool samples were collected on the average 45th, 75th, 105th, 135th, 165th, 195th, and 225th day of the lactation period. A group of Improved Wallachian breed sheep was added to the experiment for comparison. The milk of the Tsigai breed contained on average 20.03 % of dry matter, 8.14 % of milk fat, 6.38 % of proteins, 4.70 % of lactose, and 63.86 mg/100 ml of urea. The following physicochemical traits were assessed: active acidity, titratable acidity, and a freezing point of the milk. The average value of active acidity was 6.55, of titratable acidity 9.2 °SH, and of the freezing point -0,576 °C. The last sample surprisingly contained a low amount of lactose, however, the most surprising finding was an extremely low amount of somatic cell count at the end of the lactation period. Ascertained correlations correspond with the available papers and do not differ significantly. The acquired results for the Tsigai breed are comparable with the comparison breed of Improved Wallachian.
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