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In recent years, the number of cows kept in the system without market milk production has been increasing in the Czech Republic, especially at the expense of the number of dairy cattle. At present, approximately 226,000 BTPM cows are bred in the Czech Republic. The main economic indicator of beef cow breeding is the number of reared calves per 100 cows and their achieved live weight. The aim of the work was to prepare a literature review including the characteristics of aubrac and shorthorn breeds, performance characteristics and the main influences affecting the performance and fertility of stallions. Another goal was to evaluate the growth ability of calves in two monitored herds of beef cattle. The monitoring took place on farms that operate in the mode of organic farming. A total of 66 calves were monitored. Data on sex, date of birth, origin and weight of calves (aged 120, 210 and 365 days) were obtained from records of control of performance of beef cattle breeds and farm records. Birth weight was determined by a qualified estimate of the breeder (according to the breeding standard and the experience of breeders). The data were processed in MS Excel and Statistica 12 into tables and graphs. When comparing the weight of both breeds at the age of 120 days, the weight is slightly higher in the observed herd of the Shorthorn breed, compared to the Aubrac breed. At the age of 210 days, the average weight achieved is also higher in the shorthorn breed, which partially affects the individual's own performance and feed quality. At 365 days of age, the aubrac bulls had a greater difference in weight than the shorthorn bulls. When comparing the weight of heifers in both breeds at the age of 120 and 210 days, the weights are almost balanced. The Shorthorn breed achieved the highest increments from birth to control weighings. The monitored herd of the aubrac breed reached a slightly lower average weight in comparison with the population of the aubrac breed in the Czech Republic. When comparing the monitored herd of the shorthorn breed and the population of the shorthorn breed in the Czech Republic, the monitored herd achieved balanced results. The monitored herds achieved very similar results, so it cannot be said with certainty that one breed was better than the other.

The aim of this work was to analyze selected effects on the growth of calves of a selected herd of aberdeen angus cattle in Mýto farm in Hořice na Šumavě for the monitored period of 6 years (2012 - 2017). A total of 242 pure-bred calves of the aberdeen angus breed born during the reference period was included in the evaluation. Birth weight, weight at 120, 210 and 365 days were determined in calves. Subsequently, the group of calves was sorted by sex, year of birth, month of birth, birth order, father's individuality and mother's exterior. The data were statistically processed in Microsoft Excel and evaluated in Statsoft Statistica. When confronted with the national average published in the KUMP deadlines, the observed calves always had a lower birth weight, but higher weight at 120, 210 and 365 days. When evaluating the effect of the year of birth on calf growth, it was found that calves born in 2012 and 2013 achieved the best results. The best months for calving aberdeen angus breeds on the monitored breed were February to April. In terms of birth order, calves born to cows after the third calving achieved the best results. The worst results were achieved by calves from heifers and cows after the ninth calving. The best breeding-bull in breed regarding to the growth ability of calves was the sire ZAA 916. The PAA 027 sire showed the best results in terms of ease of delivery. There was no significant difference in the effect of maternal exterior on the growth ability of calves.

The research in this diploma thesis aims on the comparison of quantitative and qualitative characteristics of selected clones of variety Sauvignon blanc. For selected clones were compared phenological phases, uvological characteristics, analysis of grape must, wine analysis and sensory evaluation. The experiment was carried out in the vineyards of the company Ampelos a.s. It was observed eight clones of variety Sauvignon Blanc. It was observed phenological phases in the same conditions of given clones. It was then determined uvological characteristics of bunch of grapes which was aimed on the average weight of bunch of grapes, the average weight of berries, the average weight of berry, the average weight of stem, the average number of berries and the average size of bunch of grapes (length x width). In the grape must were measured the analytical values, such as the sugar content, the amount of titratable acid, pH, the assimilable nitrogen content. From the results, it was clear that clones from Czech selection are much better adapted to the Czech climatic conditions. It was also observed that not all clones from Czech selection achieved better results than clones from abroad. This was confirmed in the case of clone 29/68 which has got the worst results from the all observed clones. As an ideal option for producing high quality wines is a planting composed from multiple clones with different characteristics.

The aim of this thesis was to evaluate the chosen effects of control of performance on the growth of calves in the most common meat breeds of the South Bohemian region (Aberdeen Angus, Charolais, Limousine, Beef Simmental) involved in the monitoring of performance of beef cattle during the period 2009 - 2014. The aim of this thesis was to evaluate what influences affect the weight of beef calves during their rearing. When comparing the average weight of calves according to breed, the highest weight at birth were (42.37 kg), at 120 days (191.32 kg), at 210 days (307.65 kg) and at 365 days (503.53 kg) with the Charolais breed. When examining the influence of year of calving at the birth weight at 120, 210, and 365 days, it was found that calves of Limousine breed clearly reached the highest weight in 2012 in all age categories. In determining the effect of month of calving for the birth weight at 120 and 210 days of age, the best months are December to March for Aberdeen Angus and April was the best month for calving for Beef Simmental. The period of calving is going from winter until spring months. Aberdeen Angus cows up to the fifth calving make up 73.29 % of the herd. When examining the influence of calving order to calves weighing at 120, 210 and 365 days of age, the worst of all breeds are calves from the first calving. At 120 and 210 days of age, Aberdeen Angus calves were at the highest weight with the 6th calving, Limousine breed were at the highest weight of calves with the 9th calving. At 365 days of age, Aberdeen Angus calves had the highest weight with the third calving. Rearing management breed is clearly the best with breeders who participate in national exhibitions and produce bulls and heifers. Relative breeding values of the Fathers for Direct effect - growth (Peru) and relative breeding values for maternal maternal effect - growth (Meru), have verifiable affect on the weight of calves

The aim of this thesis is to evaluate the influence of leaf fertilizers at potato yield. The main advantage of leaf nutrition is speed of an action on a plant, possible combination with other interventions (application of fungicides) and economy of use. Leaf nutrition promotes tuber yield and quality, mainly in their tuber set and poor growth conditions. It is important to perceive leaf nutrition as a suplement nutrition because it is no substitute for root nutrition. The field experiment was established on the land of the University of South Bohemia in České Budějovice in 2011. There were used selected varieties of potatoes with different growing season. Very early variety Magda, early variety Adéla, semi-early varieties Laura and Satina and serotinous variety Bionta. The experiment was comprised of four variants and in four replications. There were used liquid solution of urea, Lignohumate and Lignohumate with NPK for fertilizer of variants 1, 2 ,3. Control variant was without aplication of fertilizer. There were evaluated proportion of grow-up plants, tuber yield, proportion of ware size tubers, the number of tubers per plant, the average weight of one tuber, the average weight of ware size tubers and starch content. It was found out using of liquid solution of urea increased tuber yield of all selected varieties. The highest yield of varieties Adéla and Laura was achieved by application of Lignuhumate, the highest yield of varieties Satina a Bionta after using of liquid solution of urea. Very early variety Magda was not too responsive to application of leaf fertilizers excep using of liquid solution of urea.