The aim of this diploma work was to analyse the results of the Aberdeen Angus meet oxherd breeding in an ecological farming with the welfare relationship to the animals and at the same time to compare the efficiency after the system change of the farming at the farm Angus, Rančice, owned by Šebelka. The research was done in the period of years 2006 ? 2011. The survey range includes 65 heads of thorough-bred cows as well as 204 heads of Aberdeen Angus calves born in the tracked period. The number of births, the birth process, and the age before lay out and related reasons were recorded by the cows. By the calves we noted the live mass and average daily gain in the growth process. The range of the calves was then sorted our by year of the birth, gender, rank of the birth, by genitors and by the way of farming. The data entries were elaborated in the MICROSOFT EXCEL and evaluated in STATISTICA 7 CZ. The number of spontaneous birth without cowman assist equals 94,12%, only 4,41% of births required the necessary support. By the monitored number of calves no matter of the gender was noted the lowest and the highest live mass by the birth in the year 2007 (36,81 kg resp. 38,77 kg). The group of calves born in 2010 reached the highest average weight in 120 days as well as in 210 days (192,27 kg resp. 309,04 kg). The lowest average weight in 120 days was noticed in year 2009 (168,96 kg), in 210 day in 2008 (262,31 kg). The best growth ability from the birth to 120 days was by the group of calves born in 2010 (1,409 kg) compared to the lowest result in 2009 (1,099 kg). The average daily gain from 120 till 210 days reached its minimum in 2009 (1,171 kg), the maximum numbers were noted in 2010 (1,412 kg). The growth intensity from the birth till 210 days circulated in the range of 1,071 kg (2008) and 1,377 kg (2010). In the ecological agriculture system were noted statistical better efficiency results (live mass, growth intensity) compared to conventional agriculture system.

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.

My thesis which deals with optimization of durable meat products processing. Research has found that during drying a durable meat product, there has been a gradual water loss and impairment of aw below 0.85. Fat and salt levels were rising. Measured values show that an optimum time to dry durable meat products is 42 days and it should be done gradually. Measurements have shown that the results are strongly influenced by random variations. Only the difference in the average proportion of fat between 7th and 14th day wasn´t proved at the 5% level of significance.

The aim of this dissertation consists in analysing the results of the biotechnological techniques (insemination, embryotransfer) for a selected herd of meat-type cattle raised in a foothills countryside dutiny 5 years (2002 {--} 2006) and their comparison with natural breeding. The results this obtained are presented in dependence on the breed, fater{\crq}s origin and calving month. The analysis involves 795 Charolais calves and 450 meat-type Siemental calves. In the Charolais group insemination gave 275 calves, while natural breeding gave 520 calves. In the case of meat-type Siemental group the corresponding numbers are 179 and 271, accordingly. After embryotranfer we have got 4 Charolais calves and 15 calves of the other breed. The work evaluates the influence of the technique of breeding on to the rate of calf grow, with this investigation being performed in dependence on the breed. The meat-type Siemental bulls have shown a significant difference (p {>} 0,05) in the live weight of the calves 120 and 365 days old. In this age bulls born after insemination have been heavier (183,9 kg, 527,9 kg) in comparison with bulls born after natural breeding (172,4 kg, 497,0 kg). Concerming Charolais bulls, no statistically significant difference in the live weight have been found. In addition, no significant influence of the mode of breeding on to the live weight has been found for heifers of both breeds. Concerning the effect of the calving month on the rate of grow, the meat-type Siemntal calves have shown a highly statistically significant (p {>} 0,001) difference in the live weight of calves born in March. The live weights of calves born in March and weighed at 120, 210 and 365 days have been 181,17 kg, 289,2 kg and 510,31 kg, these values being valid for calves after insemination. The corresponding values for natural breeding are lower, particularly 168,26 kg, 271,37 kg and 439,59 kg. In addition a statistically considerable difference (p {>} 0,01) in the live weight has been found for calves 120 days old if the calves were born in April. Insemination has led to a live weight of 194,5 kg, while natural breeding to 168,9 kg. In the group of Charolais calves a statistically significant difference (p {>} 0,01 {--} 0,05) has been found at the age of 365 days. Calves born after insemination had a higher live weight (462,85 kg) as compared to those born after natural breeding (432,85 kg). As concerns the parameters characterising fertility, the following ones have been analysed: the service period (SP), the birth-to-birth interval and the percentage of becoming pregnanat after the first insemination. For the whole period under investigation, the SP value for the Charolais calves (T 100) has been 89,19 days while for the meat-type Siemental calves (S 100) 80,04 days. As concerns the birth-to-birth period found for Charolais (381,32 days) and the meat-type Siemental (390,35 days), it may be stated that these results are satisfactory. The percentage of becoming pregnant after the first insemination has shown a downword trend for both breeds in the course of the years under study. Investigated paramentrs of growth and reproduction are markedly influenced by the breed.

The aim of this diploma work was to evaluate the level of beef utility at particular breeds. The breeds were bred in different climatic conditions of foothills and mountain regions of the Southern and the Western Bohemia. It was observed the use of permanent green grass by beef cattle´s pasture in relation of reached utility. There were included in total 31 farms in monitoring. The farms keep 7 breeds (Aberdeen Angus, Galloway, Hereford, Highland, Charolais, Simentál and Salers). There were 16 farms situated in regions under 600 meters above sea-level and 15 farms in regions over 600 meters above sea-level. The data were collected during 5 years. At cows, month of calving and occurrance of complicated births, have been recorded. The weight of calves at birth, in the age of 120, 210 and in certain cases also 365 days, has been checked. There were counted the average daily gains to mentioned weights. The group has been sorted according to breeds, elevation above sea-level and sex of the calves.

This dissertation deals with the issue of breeding and economic evaluation of beef cattle within the company 'Zemědělské družstvo Krásná Hora nad Vltavou a.s.' between 2009 and 2010. The goal of this work is to evaluate the breeding standard of Blonde d' Aquitaine livestock breed in the above-mentioned company's breeding barns in Vysoký Chlumec, Obděnice, Skrýšov, Hojšín and Narysov. The results show that the profitability of beef cattle breeding is possible only on condition of subsidies and significant wages and overhead costs lowering.

The thesis Difference between business production of dairy cattle and beef cattle breed is focused on quantification the differences between dairy and beef cattle breed. Main objects of observation were differences in the number of born and dead calves, the differences in negative selection of cows, average states of heifers during one year, average number of fattening bulls and young bulls destined to fattening , and also differences between revenues of milk and sold animals. This information was gathered on two farms with cattle production, one is dairy farm on South-Moravia region and another with beef cattle is in Moravian-Silesian region. All was observed in year 2016. The results of this thesis were that difference of all business production between dairy farm × beef cattle farm could be until 53 036,5 Kč/cow/year for dairy cow farm. Dairy cattle farm earned almost 30 799 824 Kč for year, with no subsidy. The 77,8 % of revenues was formed by milk and 22,2 % was formed by slaughter animals. The beef cattle farm earned 2 509 888 Kč for year 2016, with no subsidy. Difference between the number of born and dead calves was almost identical. Approximate natality in dairy farm was 91,2 %, in beef farm was 95,5 %. The number of dead calves was in both farms same, 10 %. About negative selection of cows, there was bigger selection in dairy farm (20.51 %), than on beef farm, where was lower selection (8,15 %). In average states of heifers in category from 6 months to 1 year the states were different in seasons, when in June and July there were no heifers in beef farm. The states in category of 1 year to 2 years were judged as a contradictory, because in months where on dairy farm states grew up, the states on beef farm falls. The category of heifers in 2 years and older was the most same and the lower state were in both on the beginning of the year and higher on the end of the year. About the fattening bulls, in both farms were different production (fattening × production of young bulls and heifers). The dairy farm has earned for fattening bulls all year long. The September was the month where the both farms sell the most animals. In this month the beef farm sold all young animals. The exception was two breed bulls sold in the half of the year.

The aim of this dissertation lies in analysing the calf growth of a selected herd of meat-type cattle raised in a foothills landscape. The period of investigation lasted 5 years (2002 {--} 2006). The data obtained for the breeds Charolais and the meat-type Siemental cattle are presented in dependence on the breed, convenience of birth, mother´s height in the cross, calving month and the serial number of the birth. The study covers 795 Charolais calves and 450 calves of meat-type Siemental breed. In the time interval mentioned above, the Charolais breed gave 400 bulls and 395 heifers, the corresponding numbers for the meat-type Siemental breed are 226 bulls and 224 heifers. Considered from the viewpoint of breed influence on to the calf rate of growth, the investigation has revealed no statistically significant effect. A statistically significant effect has been revealed only for heifers 120 days old, the live weight of the meat-type Siemental heifers being higher (162,71 kg) than that for the Charolais heifers (158,14 kg). The differences in the live weight amount to 4,47 kg. Statistically, this diference is probably significant, the significance level p = 0,05. Furthermore, the work has studied the effect of calf sex onto the rate of growth in both calf categories mentioned above. The live weight of the meat-type calves show a statistically highly significant difference (p {>} 0,001) for the bulls and heifers at the age of 120, 210 and 365 days. At the age of 120 days, the live weight of bulls is by 14,31 kg higher compared with that of heifers, at the age of 210 days the difference amounts to 25,65 kg and at 365 days 116,29 kg. Similar differences between bulls and heifers are statistically highly significant also for Charolais calves. At the age of 120 days the bulls are heavier than heifers by 18,45 kg, at 210 days by 29,16 kg and at the age of 365 days this difference amounts to 115,59 kg. The study covers also the investigation of the effect of mother´s cross height on to the rate of calf growth. Considered statistically, no such effect has been revealed for calves 120, 210 and 365 days old. The investigation of the effect of the calving month has brought us to a conclusion that the heaviest calves are born in March and April, with the differences in individual months ranging on significance levels p {>} 0,001, p {>} 0,01 and p = 0,05. In both breeds we have also investigated the effect of the serial number of the birth on to the live weight. For the Charolais breed, the highest weight has been found for calves with serial number 3, 4 and 5. For the calves of the meat-type Siemental breed it has been found that the calves born as the second one reach the highest weight at the age of 120, 210 and 365 days,the results obtained being statistically highly significant (p {>} 0,001) and probably significant (p = 0,05).

The purpose of this thesis was to analyze the efficiency and fertility of beef cattle herd kept without market milk production on a farm Ostrý u Jistebnice, owned by ing. Pavel Kozák. Monitoring of the herd took place in the period between the year 2006 and 2008. The objects of analysis were 149 purebred cows and 296 calves of Belgian Blue, Blonde d{\crq}Aquitaine, Charolais, Limousin and Simmental breeds.At cows, age during first calving, time interval between calving, number of birth and occurance of complicated birth have been recorded.The weight of calves at birth, in the age of 120, 210 and 365 days, has been checked and average daily increments have been counted.

During the work, results of ten sires of beef breeds had been observed in OPB Cunkov s.r.o. Over the years 2004 to 2007, 590 pieces of animals was evaluated. The highest number of all the evaluated sires was at the breed charolais (211 pieces), with average daily gain of 1883 grams, which was the highest daily gain from all the breeds evaluated. Of all the number of bulls included, 81,7% of them was included in breeding process and 18,3% of them was negative selected. Rearing house is an important means the other progress of beef cattle breeding.