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Vyhodnocení užitkokvosti vybraného stáda masného skotu
BRATRŠOVSKÁ, Nicola
The aim of the bachelor thesis was to find out how specific influences affect meat productivity in a selected herd of beef cattle. In the introductory part of the thesis, the concept of meat yield was explained, and then the influences that affect meat yield were discussed. To evaluate the effectiveness of these influences, a herd consisting of beef simmental and blonde d'aquitaine breeds was selected, where 197 pure-blood calves were born between 2019-2021. These calves were involved in performance control and the data from these controls were used in this bachelor thesis. The cooperative breeding this herd was presented in detail and then the data was evaluated. In the evaluation, the weight of the calf at birth, at 120 days and at 210 days was taken into account. These influences also included the sex of the calf and the month of birth. As part of the data assessment, higher average weights at 210 days were found in bulls, and when comparing individual breeds, better results were found in the beef simmental breed.
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Influence of minerals on health status and reproduction of cattle without marketable milk production
DVOŘÁKOVÁ, Markéta
Minerals in beef cattle nutrition are very important for the health of cows, their conception and also for their calves and colostrum, which is very important to them. The aim of the work was to evaluate the health status and reproductive indicators in terms of the content of minerals in the blood of BTPM cows. The literature review describes the digestive system of cattle, characterizes beef cattle and especially meat simental, in which the experiment took place. I also describe the nutrition of cattle, blood composition and hematological parameters of blood. A total of 3 samples were taken every 3 weeks. In each sample, 12 blood samples were taken from cows aged 20-30 months with a live weight of 600-750 kg. Overall, most values were within the usual ranges. By maintaining the same feed ration and adding a mineral lysis with increased selenium content, the cows could get better and some mineral values would improve.
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Zásady chovu plemene masný simentál
Chytka, Vladimír
This bachelor thesis focuses on breeding of beef simental in the Czech Republic, but also in countries where this breed is very numerous. It describes the individual breeding countries on the question of the type of animal, polled, color and another specifications. In czech population is analyzed evolution from the beginning of the breeding beef simmental to the present. Properties and specifics of AI bulls which were crucial for the development of breeding in Czech republick are described in detail. Here are described technology of breeding in the summer on pasture and also technology of breeding in winter. The growth of beef simmental is compared within breeds in the Czech Republic and also the growth is compared with animals in Germany and Denmark. Inalienable part in this thesis is the issue of polled that nowadays is very discussed.
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Vyhodnocení reprodukčních schopností a růstu potomstva u plemene Masný simentál
Chytka, Vladimír
Beef Simental is a beef breed that is bred almost all over the world. In the Czech Republic there is the third most widespread of meat breeds in the number of cows. Most breeding bulls of this breed act in natural breeding, which confirms its popularity in commercial crosses. This diploma thesis was focused on growth ability and evaluation of reproductive indicators in five breeds dealing with breeding of this breed in performance control. The influence of breeding conditions, sex, breeding method, calving on weight of calf at birth, at 120, 210 and 365 days was monitored. Furthermore, the length of the interim period, the age at the first calving and the order of calving of the cows in the herd of individual breeders were determined. The influence of breeding conditions, breeding method, sex and calving rank was statistically highly significant (p ˂ 0.01). Difference between calves born after insemination bulls and after natural breeding was 25 kg. Bulls had higher weights in all reference periods (120, 210 and 365 days). The difference between the average weight of a bull and a heifer was 146 kg. There was a statistically significant difference (p ˂ 0,01) between the calves from the first calvers and the cows on the second calf and the other calves in weight. The average age at first calving in the evaluated farms is 954 days which confirms the current trend but is in conflict with the breeding goal of this breed.
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Vliv různých systémů ustájení v období porodu na mateřské chování masných krav
NABYTÁ, Michaela
The aim of this thesis was to conduct the ethological observation of the meat cows´ maternal behaviour in the period of calving. The observation was realized on the farm with utility breeding of meat cows Milná at an altitude of 800 m, where two herds (A, B) of 20 heads were formed. In herd A, there were horned crossbred cows of Masný Simentál breed that were placed on the pastures, including 20 ha winter rally, year-round. In herd B, there were also the crossbred cows of Masný Simentál breed that were stabled in the empty reconstructed shed organized in boxes during the wintertime. In herd A, 55% of cows calved during the daylight. The biggest incidence of parturitions was registered from 6:30 to 8:30 am (36 %). 65 % of cows calved out of the herd in the distance from 200 m to 450 m. The first suction at 90% of calves happened without the keeper´s assistance. Among the stabled cows, only 25 % of them calved during the daylight, mainly from 7:00 to 8:00 am. 50% of cows calved in the corridor. The first suction without the keeper´s assistance occurred at 85 % of calves. Placement of meat cows into the shed during winter proved to be suitable due to better care of both the cow and the calf. Cows winter in better climatic conditions that can, for example, positively influence their longevity. Devastation of the winter rally lands decreases markedly.
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Vliv vybraných způsobů reprodukce ve stádě masného skotu na růst telat
HANŽL, Jaromír
The thesis goal was to evaluate the effect of selected breeding methods in Simmental cattle herd on chosen indicators calf birth weight, weight in the age of 120 and 210 days. The thesis deals with the evaluation of differences between sex and the comparison of calving seasons 2014 and 2015 and also shortly focus on the comparison of chosen sires and the evaluation of its effect on selected indicators. Proposal of measures in specific breeding based collected and statistically evaluated data in part of this thesis. As the first, using a linear model, analysed the effect of individual factors which can affect observed indicators was analysed. Afterwards the evaluation of difference between each factors category was done. Within first observed factor which was breeding method was found, that the best results are reached by embryotransfered calves with birth weight 46.81 kg, weight at 120 days 201.11 kg and weight at 210 days 318 kg. The weight at 210 days within artificial insemination group was only 304.33 kg and within natural breeding group 297.68 kg. Furthermore it was found that bulls reach better results in all observed indicators in comparison with heifers. In the light of birth difficultness is important birth weight which was 46.66 kg within group of bulls and 43.45 kg within group of heifers. Weight at 210 days was 321.59 kg, respectively 294.21 kg in case of heifers. It was also found that in 2015 the studied group of calves reached better results than in year 2014 in all observed indicators. Live weight in 210 days was 326 kg and 295.63 kg respectively. The evaluation of observed indicators according to sires showed that a sire significantly affects birth weight; however the effect was not significant on weight at 210 days. The best of compared sires was ZSI 478, birth weight of calves was 48.8 kg.
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The analysis of beef cattle herd on family farm
ŠIMÁNKOVÁ, Karolína
The aim of the bachelor thesis was performance evaluation of Simmental breed cattle herd within the period of 2011 2013 on a private farm. The herd consisted of 39 purebred cows as well as crossbred cows. The average lenght of the calving interval was 379.4 days and the age at the first calving was 27.3 months. Herd of calves consisted of 85 pcs. Birth weight and weight at age of 120 and 210 days was studied within group of purebred calves (49 pcs). Herd of calves was categorized by year of birth, by birth order, by sex and by sire. Meat performance and carcass value basic data were obtained within group of fattened animals. Data were statistically processed in Microsoft Excel and evaluated in programme Statistica 12. Average birth weight of calves was 41.69 kg; the average weight in 120 days was 207.86 kg and 320.6 kg in the age of 210 days. Calves reached average daily gain from birth to 120 days 1.38 kg, from birth to 210 days 1.33 kg and from 120 days to 210 days 1.25 kg. When groups of calves were classified by years, statistical differences between birth weights according to year were found. Calves born in 2012 reached the best weights in 120 and 210 days of age (215.80 kg and 327.20 kg respectively). Significant differences were found especially within birth weights according to birth order; particularly within group of first-calf heifers. First born calves average birth weight was 38.25 kg, second born 40.57 kg, third born 43 kg, fourth born 41.82 kg, fifth born 42.10 kg and sixth born calves average birth weight was 47.33 kg (significant differences were found between 1. and 2., 4. and 5., 4. and 6., 2. and 6. birth order ). The average slaughter age of animals reached 561.1 days, the average slaughter weight reached 502.6 kg and the average carcass weight was 316.21 kg. Slaughter weight of bulls reached 559.20 kg and heifers 374.09 kg, observed difference was statistically significant. Statistically significant difference was also found at carcass weight.
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Zhodnocení přírůstků a výšky v kříži býků masných plemen na vybrané odchovně plemenných býků
Přikrylová, Monika
Thesis deals with the bulls performance testing of beef cattle raised on chosen performance test station. At first the brief introduction to this domain and the general characterization of individual beef breeds are given. Further, the intensity of growth and influencing factors are described. Next chapter focuses on feed and recommnended amount of nutrients. Last part of theorethical section is devoted to relevant farm welfare requirements that are set by the Czech Beef Breeders Association. The first goal of practical part is to examine performance of beef breeds of cattle during four studied periods. The stress is laid on evaluation of mass and height growth of beef bulls. The mathematical Methods of Statistics are used to compare performance and its deviation between studied breeds.
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