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Analysis of the causes for discarding dairy Holstein cattle
PROVAZNÍK, Pavel
The bachelor thesis analyses the causes of discarding of dairy cows of Holstein cattle. The aim of the thesis is to evaluate the most common causes, which lead to discarding of dairy cows from breeding in collective farm Trhový Štěpánov a. s. In this thesis were evaluated the results for 294 dairy cows in 2010. The underlying data were obtained from Dairyplan programm on the farm in Trhový Štěpánov, from economic analysis of ZD Trhový Štěpánov a. s. between 2008 and 2010 and from the annual report for each year. In 2010 there were discarded 294 dairy cows from total 864 pieces, that means 34 % of total number. Among causes of discarding of dairy cows belong low productivity, other zootechnical reasons, udder desease, fertility disorders, difficult births and other health reasons. The most dairy cows were discarded for other health reasons. To other health reasons belong liver desease, displacement of abomasum, paratuberculosis and bad condition of limbs. For these reasons it was discarded more than 57 % of dairy cows. The second most common reason was the fertility disorder with less than 16% of dairy cows and the least of dairy cows were discarded for the bad condition of udder and the other zootechnical reasons. Analysed causes of discarding of dairy cows in ZD Trhový Štěpánov a. s. mainly agree with results of control of productivity in the whole Czech Republic.
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