STUDY ON SOW CULLING RISKS IN A LARGE-SCALE PIG FARM
| Autor: | P. BALOGH, I. ERTSEY, S. KOVÁCS |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Scientific Papers Animal Science and Biotechnologies, Vol 40, Iss 2, Pp 235-241 (2007) |
| ISSN: | 2344-4576 1841-9364 |
| Popis: | Sow culling is a significant task for animal breeders and farmers; moreover, itprovides a basis for profitable pork production as well. The reason for culling themajority of sows is their low productivity. 15-20% of culled sows farrows only once,and sows in product-manufacturing farms generally do not live until their 5.farrowing cycle. Depending on farm potentialities, it can have several reasons. Ourstudy has investigated data from 1969 sows culled in 2005 in a large-scale pigbreeding farm with 3000 sows in Hajdú-Bihar County. Our results were calculatedby one of the non-parametric forms of Survival Analysis, the Kaplan-Meier analysis.Mortality intensity was quantified by one of the other models of Survival Analysis,the log-rate exponential model. In terms of culling, we have determined the riskvalues of different genetic potentials and various culling reasons. |
| Databáze: | OpenAIRE |
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