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Vliv zdravotního stavu dojnic na množství, složení a technologické vlastnosti jejich mléka
Justová, Andrea
The aim of this bachelor thesis was evaluate the effect of the health status of dairy cows within quantity composition and technological properties of milk. Milk samples were collected from Bohuňov company. Monitored cows were Czech Fleckvieh cattle. Total number of samples was 20. Monitored properties were: content of protein, content of fat and solids-non-fat. Between technological properties were included: rennet coagulation time, quality of curd, density of milk, milk freezing point, active acidity and titration acidity. In the study were found average values of monitored indicators: protein kontent 3,11 vs. 3,14 g.100g-1; fat content 3,80 vs. 4,06 g.100g-1; lactose content 4,64 vs. 4,69 g.100g-1; solids-non-fat content 8,45 vs. 8,54 g.100g-1; density of milk 1,0287 vs. 1,0289 g.cm-3; freezing point of milk -0,5389 vs. -0,5210 °C; active acidity pH 6,82 vs. 7,17; titratable acidity 6,41 vs. 5,67 SH; rennet coagulation time 208 vs. 213 sec and curd quality class 2,64 vs. 2,60. It was found statistically significant (P < 0,01) diference between aktive acidity of milk. Differences between another monitored parameters were statistically not significant (P > 0,05).
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