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Zhodnocení výkrmu býků na vybrané farmě
BALDÍK, Rudolf
The main concern of farmers cow suckler is production of quality beef, maintaining the natural landscape and cultural condition and rural development. The aim of the study was to compare in terms of the economic outcome of two periods of one year, when the first period breeder bulls was producing a year-round silage and hay, and in the second period during the season he fed green fodder. Young bulls are fattened his own breeding and the rest is bought as weanlings at the age of 6-8 months. The bulls are fattened until the age of about 24 months. The Bulls were divided into 2 groups: the first group of bulls (the year of slaughter 2012), which was fed clover silage, hay with the addition of a second core group of bulls (the year of slaughter 2014), which was reared as a group in 2012, but the summer is replaced by fresh clover silage, clover-grass. The results from both groups fattened bulls show that bulls are fattened summer fresh clover forage, they have better gains and achieve higher slaughter weight than bulls fattened only clover silage, at the same time fattening. The advantage of this method of feeding is economical savings on feeding day.
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Analysis of beef cattle herd
BRŮHA, Karel
The purpose of this thesis was to evaluate the level of performance of Aberdeen Angus beef cattle breed bred in Less-favoured areas in southern Bohemia. This evaluation was carried out on Mr. Lepša?s farm in the years 2010 and 2011. 74 basic herd cows and 108 purebred calves born during this period were selected for this purpose. The date of birth, number of births, age at first calving and the average time interval between calving were checked on cows and the date of birth, the weight at birth and the weight in the age of 120 and 210 days were checked on calves. Average daily increments in the interval from birth to 120 days of age, from 120 to 210 days of age and from the day of birth to 210 days were calculated. The group of calves was sorted out by following parameters. Year of birth; sex and year of birth; month of birth; order of calving of the mother. Microsoft Excel was used for processing the statistic data. Basic statistical characteristics for the monitored parameters were calculated and differences between groups were verified by single-factor analysis of variance (F-test) and paired t-tests for the corresponding levels of significance. Breeding cows were evaluated by age and number of births. Cows with 1 (23%) or 2 (17.6%) births are represented in the largest number in the herd including even the cows with 15 births. Cows at first calving reached an average age of 813 days and average length of the interval between calving was 393 days. Calves regardless of sex reached the average birth weight of 33.72 kg in the year 2010, 33.31 kg in 2011, in 120 days of age the average live weight reached 207.95 kg in 2010, 202.94 kg in 2011 and calves in 210 days of age reached an average weight of 309.61 kg in 2010 and in 2011 306.09 kg. Average daily gain of calves from birth to 120 days reached 1451 g in 2010, 1.413 g in 2011, between 120 and 210 days of age the average daily gain was 1413 g in 2010, 1169 in 2011 and in the period from birth to 210 days of age it was 1314 g in 2010 and 1299 g in 2011. Analysis of breeding from economic perspective by comparing revenues (including subventions) and expenditures in each year resulted in findings that the breeding is moderately profitable and it follows that without subventions which constitute an important part of the revenue would be difficult to realize this breeding.
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