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Vliv mykotoxinů ve výživě skotu
Hulík, Michal
An experiment was conducted with adding an agent based on 1,3 and 1,6 beta-glucans to standard cattle nutrition (TMR), which was regularly tested for content of some important mycotoxins, in order to gain knowledge about possible positive effect of this agent on the health of dairy cattle and about possible avoidance of negative effects of mycotoxins on dairy cattle due to their structural elimination caused by the agent. Using data from a control sample it is also able to determine some effects of mycotoxins contained in nutrition on dairy cattle in general. Throughout the four months long experiment, which took in place at Farm Sebranice in the Czech Republic, six groups of dairy cattle were fed alternately the standard nutrition and the above-discussed agent-enriched nutrition while data of their health state, milk yield and pregnancy rate were collected. Concerning health of cows, specifically the occurrence of mastitis, there was found no significant trend. The average milk yield of the dairy cows which were fed the agent enriched feed (30.2 kg a day) was slightly lower in comparison to control groups (31 kg a day, both results with P<0.001), however, fat content of milk of test groups' cows (4.02 %) was considerably higher than that of control groups' cows (3.79 %). The average pregnancy rate of cows which were fed the agent enriched feed also manifested considerable increase in percentage and stability (from 42.95 % of control groups' cows to 62.25 % of test groups' cows, the standard deviation decreased from 21.1 % to 14.4 % which means smaller differences among pregnancy rate of test groups' cows, hence higher stability), this increase manifested even long after the cows had been fed regular feed again
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