The aim was selected in a commercial breeding (AGRO Vodňany a.s.) to analyze and evaluate herd reproductive performance of sows used for the production of piglets (final hybrids). The analysis was focused on the age structure of the sow, when the first and second litter was 28.8% on the 3rd to 5th litter 23.5% and the sixth and other litters of sows 47.7%.The annual renewal of the herd was culled 22.9% and 25.5% included sows for breeding.This breeding is used natural reproduction, where for the purposes of reproduction bred four boars lines of 48 (White paternity x Pietrain).The average gestation length breeding was 115.2 of days. In 2016, it was born an average of 13.8 piglet per litter, of which 11.5 piglet of live and been preserved was 10.2 piglet per litter.The length of the farrowing interval was 171,1 days and the onset of estrus after weaning piglets was an average of 4.9 days.Weaning is in monitored husbandry carried out between 28 to 31 day age of piglets.Part of this work was to evaluate zoohygiene also at stud and compared with the results of performance farms in the Czech Republic and recommendations for improving the results of husbandry evaluated. When comparing the results of selected indicators identified in Agro Vodňany a.s. with selected data published by the Czech Statistical Office for the South Bohemian Region and the Czech Republic in 2016, it was found that the number of piglets born per sow in the Czech Republic was 30.1 piglets. Piglets was born25.1 in South Bohemia and 24.3piglets was born per sow in Vodňany. The death of piglets from the number of births in the Czech Republic was 10.6% in the South Region accounted for 15.6% and in Vodňany it was 11.9%.The number of surviving piglets per sow in the Czech Republic was 26.9 piglets in South Bohemia have been preserved 21.3 piglet per sow and Vodnany during the reporting period have been preserved 21.4 piglets per sow.

The thesis is devoted to analysis of production and reproductive performance of sows of basic herd in agricurtural cooperativ Agra Březnice for the years 2010 and 2011. Sows from breeding core of the nucleic stud, sows from nucleic stud as a whole and sows from reproductive stud were integrated in the observation.The Large White breed paternal line focused attention on the reproductive characteristics, the results of their own performance and results of unified testing. The planting of breeding sows focused attention on reproductive characters in the production of stainless crossbreed sow Czech White paternal line x Czech landrase.

The objective of the thesis was the analysis of reproductive traits of sows. Data from the years 2009?2011 were obtained in the company conducting production herds. The highest number of piglets born alive per one sow a year (26.8) was reached in 2011. The highest number of weaned piglets (25.6) per a sow was obtained in 2010. By shortening farrowing index in a monitored three-year period the number of births increased from 2.29 to 2.35. We found out that sows covered at older age gave birth to more piglets born alive. Concerning total number born piglets the difference between sows covered in more than 246 days and sows covered in the age interval of 225?246 days was 0.14 piglets, or, as the case may be, with sows covered in 203?224 days the difference was 0.18 piglets. Sows covered in less than 203 days gave birth only to 10.67 total number born piglets. Most total number born piglets were found at the sixth litter (13.14), followed by the fourth litter. The fourth litter brought most alive-born piglets (12.58) and differed from the third litter only slightly. Most piglets survived at the third litter (11.61). The relation between all piglets and those alive-born was statistically highly conclusive 0.859+++. The highest number of total number born piglets was reached with sows which were covered 5 (12.84) or 6 days (12.79) after weaning.

Air ionization is a method used at air treatment of closed spaces. Properly applied air ionization improves health condition of bred animals, lowers the costs of pharmaceuticals and increases their efficiency. Negative ions attach themselves to particles of dust causing them to drop to the ground. The aim of the thesis was to analyse the influence of air ionization on air dustiness in a relation to temperature changes and relative air humidity in a farrowing house for sows. The farm used litter in the lairage pens. Sows were fed with dampened mixture. By the help of a data logger was measured the temperature [°C] and the relative air humidity [%]. The readings were recorded at hourly interval. Speed of the air circulation [m.s-1] in the stall and the cooling power [mcal.cm-2.s-1] were measured in the resting stage. The air dustiness in the stall was measured on the level of a lying sow in the state of resting, activity and after an activity. The data of the concentration of dust molecules in the air were recorded at interval of 10 seconds. The length of the measuring for each period was set for 8 minutes. The size adjustment of the dust molecules wasn?t specified. On selected days was applied the air ionization. At high temperature and relative humidity it came to binding of ions to the molecules of dust. At low temperature, high relative humidity and reduced intensity of air change in the stall the ionization didn?t have any influence on the dustiness because the dust settled as a result of the relative air humidity.