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Analýza průběhu výkrmu býků českého strakatého plemene
BALDÍK, Rudolf
Czech mottled cattle is the original breed of cattle in the Czech Republic. It is part of a worldwide population of mottled breeds of the same phylogenetic origin, widespread, for all its continents, for its excellent properties and widespread use. It currently accounts for about one half of the total cattle population in the Czech Republic. The aim of the work was to monitor the growth of fattened bulls, focusing on the last half year of fattening and trying to determine the inflection point of fattening this breed under given breeding conditions. Furthermore, the monitored bulls were compared on the basis of genetic potential, ie the representation of the blood of the Czech spotted breed and according to the father. Fattening bulls are only from their own breeding as weaners from milked herds. The bulls are fattened up to the age of 24 months and are divided into groups of about 24pcs, depending on the weight. The feed is given to them twice a day, at regular intervals, with a mixing feed wagon with weight. The feed consists of corn silage, clover-grass silage and a core mixture, which the company produces itself. The results obtained did not show a statistically significant difference in the pre-slaughter live weight by father line, by month of birth of the individuals studied or by age at slaughter. Only by comparing the live weight before slaughter by SEUROP, there was a statistically significant difference.
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Analysis of a Salers cattle herd
BÍNOVÁ, Hana
The aim of this Bachelor's thesis is to evaluate the yield level in farming of meat beef-cattle of salers bred in a private farm of David Krejcar's in the village of Žďár near Protivín. The observed period included the years 2010 till 2014. The evaluation concerns 36 heads of purebred breeding-cows and 70 heads of claves in total in the observed period. The number of calving, the age of breeding-cows at the first calving, the length of mean-time, difficulties of birth delivery, and reasons for elimination from the herd were recorded for every breeding-cow. Regarding the calves, their live weigh at the birth, at the age of 120 and 210 days were recorded. The set of the calves was categorised according to the year of birth, sex, the month of birth, the way of breeding, individuality of bull, and the order of birth. The data were statistically analysed using MS Excel and the programme STATISTICA 12 by StatSoft. The average mean-time, considering the whole herd, was 389.4 days. The breeding-cows were, at the first calving, 1.090,4 days (i. e. 36.3 months) old on average. The ratio of easy birth deliveries was 98.75 %. The average live weight, regardless the sex of the calves, was 36.66 kg. At the age of 120 days, the calves weighed 170.44 kg and 273.20 kg at the age of 210 days. The calves born in 2011 had the highest average birth-weight, which was 39.27 kg. The highest average weights in 120 days were in year 2013. Regarding the calves old 210 days, it was 289.96 kg in year 2014. It has not been proven that the breeding way influences the growth of the calves. All the observed weights of calves increased up to the fourth calving of the breeding cows. There were 13 bulls chosen for the breeding out of the total of 19 bulls in the herd.
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