The aim of the dissertation thesis was to analyze reproductive performance of sows recovered by the means of repopulation, in operating conditions of a production farm. Another objective was to analyze productive parameters of piglets and losses of piglets from birth to weaning. Based on achieved results it can be stated, that repopulated group of sows showed significantly higher reproductive performance compared to sows before repopulation. An anylsis of reproductive performance of gilts coming from two commercial programs was also conducted. The differences in reproductive performance were not found significant, however the differences in the losses of piglets were significant in favor of the program II. From the analysis of the productive parameters of piglets it is evident that piglets in the commercial program I had better growth intensity compared to piglets in the commercial program II, demonstrated by significantly higher weaning weight and daily gain of piglets. Also reproductive performance of repopulated sows from the 1st to the 4th litter was analyzed. The results indicate that there is a significant difference between parities. Reproductive performance had increasing tendency up to the 3rd litter and in the 4th litter it decreased. The most frequent causes of discarding of sows were problems with musculoskeletal system and abortions.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:249348 |
| Date | January 2014 |
| Creators | Nevrkla, Pavel |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/doctoralThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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