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Možnosti využití krmných aditiv ve výkrmu býků
VALTOŠOVÁ, Gabriela
This bachelor thesis deals with the use of additives in fattening bulls. The theoretical part begins with a brief description of the physiology of the ruminant difestion and the main breeds of beef cattle used for fattening. The following is a general description of the additives, their groups and the purpose for which they are used. Chosen additives are described in more detail, especially their effect on overal he-alth, average daily gains or meat quality of slaughtered animals. The practical part were replaces by the recommendations for practise and the comparison of the real feed ration, which is applied in the farm focused on fattening bulls and its theoretical modified verison leading to higher efficiency using additives.
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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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Influence of selected factors on the fattening capacity and carcass values of bulls in the control station Želeč
PUFR, Josef
Cattle breeding is one of the part of traditional Czech agriculture. It is a vital part of economy consisting of two main branches - milk and beef production. Beef is one of the main products of cattle breeding sometimes provided by fattening of heifers, cows and bulls. Producing meat with the highest quality with low costs is the main goal of fattening the cattles. I have tested the influence of selected fators on the fattening capacity and carcass values of Czech Fleckvieh bulls in the control station as well as the economic requirements of the fattening period. I have compared the test period of 530 ? 10 days with period of 610 ? 10 days of fattening using the old and new technology of supplementation. Further fattening was provided by results of growing Charolais, Limousin and Czech Fleckvies x Simmental bulls. The results suggest that the increase of the period of fattening for 80 days had a positive effect on carcass yield (p < 0.001), assigning in the classification according to SEUROP and profitability of farming. The positiv relationships between breeding value of fathers and carcass yield of their sons was observed. Finally, the positive influence of new technology of fattening on the classification acording to SEUROP was shown.
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