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Vliv bílkovinných koncentrátů na složení mléka u dojnic v ekologickém chovu
Botková, Kateřina
The aim of the thesis was to investigate the effect of the protein concentrate on milk quality. The attempt took place on an organic dairy farm with cows of Holstein breed, which was added to the ration a concentrate containing 60 % soybean cake, 20 % sunflower cake and 20 % linseed cake at 1 kg / head / day. The experiment lasted 30 days. Content of fat, protein, lactose, urea, free fatty acids, somatic cell count and the concentration of citric acid was determined in milk samples. Milk production was evaluated from the quantitative parameters. Addition of the concentrate had a positive effect on the fat content (P <0.05) and a decrease in free fatty acids (P <0.05). Production of urea which may be in excessive concentration dangerous for the health of dairy cows, was increased (P <0.05). Concentrate did not affect milk yield, protein content, lactose and somatic cell count. The content of citric acid was increased in the experimental and control groups (P <0.05). The results showed that the addition of protein concentrate can affect certain components of milk, but in case of inappropriate inclusion in the mix, there are health risks associated with excessive excretion of urea.
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