engleski

Dietary supplement of the rumen protected methionine and milk yield in dairy goats

The experiment was conducted on three farms of dairy goats. The experimental groups of animals were supplemented daily during the four month period with 5g Mepron® ; , Degussa, Germany. Milk yield, milk protein and milk fat content were recorded throughout the experiment. The milk production was statistically higher in the experimental group of animals on two farms, farm 1 and farm 3 at first control period, a month after the application, whereas on farm 2, the higher milk production was present at third and forth control period, two and three months after the application. During the experiment there was no statistically differences in milk protein and milk fat content between experimental and control groups on farm 1 and farm 2, whereas on farm 3 the milk fat content was statistically lower during the Mepron® ; supplementation. Changes in fatty acid composition and protein fractions should be also considered. In conclusion, the higher milk production on farm 1 and 3 at first control period with great probability referred to the influence of Mepron® ; . On farm 2, the higher milk production at third and fourth control period coincidence with alfalfa hay in daily ration that probably enriched the amino acid supply.

goat ; methionine ; milk production ; milk components

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