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.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:115856 |
| Date | January 2012 |
| Creators | ŽIVČÁKOVÁ, Jana |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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