No description available.

No description available.

No description available.

In this diploma thesis an analysis of the reproductive indicators was performed in dairy cows of Holstein cattle and dairy cows of Czech fleckvieh on the four different farms located in the Vysočina region. In the thesis were evaluated average values of reproductive performance – service period, interval, insemination index, interim and pregnancy percentage. All values were compared between individual stock and between breeds. In addition, the success rate of slaughter in individual seasons was evaluated. A total of 772 inseminations were performed at ZOD Habry in the monitored pe-riod, the service period averaged 84.6 days, interval 59.6 days, insemination index 2.04, interim 375 days and 47.3 % pregnancy percentage. The highest pregnancy was in De-cember, January and February, while the lowest was in August, September and October. The second breeding of Czech fleckvieh was KLAS a.s. In this period, 510 inseminations were performed. The pregnancy percentage was 42.1 %, interim 387 days, the insemination index was 2.6, the interval of 63.8 days and the service period was 102.6 days. The lowest pregnancy values were in June, July, August and September. Highest in the months of March, April and October. The third agricultural enterprise was Osiva Přibyslav a.s., which bred Holstein cattle. In the meantime they reached values of 392 days, pregnancy percentage 43.3 %, interval 72.7 days, service period 120.3 days and insemination index 2.44. In total 702 inseminations was performed for the given year and the most pregnant dairy cows were in November, December and October, on the contrary in the summer months. The last breeding company was AGRO Posázaví a.s. breeding Holstein cattle. The lowest values of pregnant dairy cows were in the summer months and the most pregnant dairy cows were in the winter months. Interval values reached 70.3 days, insemination index 3.2, pregnancy percentage 33.8 %, interim 408 days and service period 125.8 days. A total of 1546 inseminations were performed.

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.

The aim of this thesis was to evaluate the reproductive performance of sows corporate program Czech PIC in a commercial breeding Ratiboř, Agricultural Cooperative Chyšky district Písek. The observed breeding herd was formed on December 31, 2016 with 119 sows and gilts. To evaluate the reproductive performance, the breeding-cows were divided into breeding sows inseminated and not inseminated, sow for 1st to 2nd litters (risk litters), 3rd to 5th litters (litter production) and for the 6th and higher. The breeding sows are frequently inseminated between 230th 269th day of life. In 2016, on average 25.2 live-born units were born per sow. The number of weaned piglets was at level of 21.8, it means the values were below the desired optimum. Good results were found in the length of intervening time (155.3 days), and the associated number of litters per sow. Sows reach 2.4 litters per year, and there is no problem with the beginning of rut after weaning. A rut mostly occurs on 4th and 5th day after weaning. The total cost for sows amounted to CZK 676,519.43 per year, when 1 kg of weaned pig costs CZK 53.75.

The purpose of this dissertation is the evaluation of the fertility and the reproduction index of the sows in the breeding of the agricultural cooperative Lukavec. The herd of sows was divided into three groups according to age structure of the sows in the risk litter (litters 1 and 2), the sows in the production litters (litters 3 ? 5) and the sows in 6 and more litters. The reproduction process is influenced by a lot of impacts endogenous and exogenous.

The aim of this diploma thesis was the analysis of organic farm AgroFyto spol. s.r.o., which deals with dairy cattle breeding and suckler cattle. In an analysis of selected indicators were evaluated for milk production, selected parameters of reproduction and meat production. The results of the system of classification of carcasses of SEUROP cattle were evaluated within the meat yield. The animals were monitored for the period 2014-2017. Values related to dairy yields and dairy reproduction were obtained from performance monitoring for 2015 and 2016. The individual years were divided into four seasons after three months. In this work was evaluated the effect meantime, the time of calving, lactation, breed and season on the amount of milk in the period, as well as the impact on the amount of milk fat and protein content of milk for the year 2015 to 2016. The analysis revealed a difference in the evidence of the effects on milk in the monitored period. Regarding the influence of milk volume on fat and protein content in milk, this effect has been demonstrated only in one of four seasons. In the analysis, the effect of the season on the amount of milk was not statistically proven. Compared to organic farm BEMAGRO a.s and foreign ecofarm, it was found that cattle on dairy farm AgroFyto spol. s.r.o. Better results in the quantity of milk in question over the reference period. Dairy Farmer FARMA ZPZ s.r.o. But they have a better milking. AgroFyto spol. s.r.o. Has a dairy with the lowest protein content in milk and the highest fat content compared to two organic farms. Compared to the overall results of the KU in the Czech Republic, AgroFyto spol. s.r.o. Lower milk yield, but higher fat in milk.

In presented thesis the chosen parameters of reproduction {--} days to first service, days open, calving interval, insemination index - were evaluated in dairy cattle. There were 222 of dairy cows observed (53 Czech Pied and 169 Holstein cows). The results of reproduction were evaluated as unsatisfactory. Length of calving interval overreached recommended 400 days in 56,25 % of Holstein and in 33,33% of Czech Pied cows. Also the mean value of insemination index 2,39 exceeds the optimum of 1,8-2,0.

The aim of this thesis is to evaluate chosen influences on the extent of reproduction of randomly chosen milk cows that are bred in the same conditions. The chosen influences such as breed, age of the first calving, time of year of calving and level of yield were observed within breeds of Czech Fleckvieh and Holstein cattle. Evaluation was carried out in ZOD "Podhradí" Choustník company, specifically in Budislav farm. 191 cows were chosen for the basic sample. 95 of them were Holstein cattle and 96 were Czech mottled cattle. Chosen influences were evaluated according to data gained from the set of milk yield inspections. A statistically significant difference was observed between Czech ticks and Holstein cows in the length of service period per second and first lactation where Holstein cows have a second lactation period longer than 44 days (P <0.001). Evaluation of first calving age did not show any influence on the level of reproduction neither within Czech Fleckvieh nor within Holstein cattle. During the annual evaluation, it emerged that Holstein cows calved in spring and winter have significantly bigger insemination interval compared to cows that were calved during summer or autumn. This fact was also proven by correlation analysis. This analysis also confirmed the relation between annual period and insemination interval Rxy=0,21(P<0,05). The correlation analysis also proved the relation between annual period and service period as well as interim of Czech Fleckvieh cattle Rxy= 0,327 (P<0,01). Statistically significant influence was not proven within Holstein cattle. Correlation analysis only pointed out the relation between yield and service period Rxy=0,213 (P<0,05). Unlike Holstein cattle, gradual increase of service period figures and interim depending on yield was noticed. Breeding cows milking more that 7,5 thousand kg of milk per lactation had service period of 132 days (P<0,01) and interim 407 days (P<0,01). Economical losses caused by prolonged interim during monitored herd of cattle reached 400.490 CZK in year of 2016.