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001-es BibID:	BIBFORM125322
Első szerző:	Osotsi, Joab Malanda (PhD Hallgató)
Cím:	Impacts of selected parity and extended lactation length of nurse sows on their subsequent reproductive performance / Joab Malanda Osotsi, Peter Balogh, Gabriella Novotni-Danko
Dátum:	2024
Megjegyzések:	The aim of this study was to assess the effect of parity and extended lactation length on selected aspects of the subsequent reproductive performance of nurse sows. Data in this study was collected from 2016 to 2022 from 53 farrow-wean swine farms managed by a pig production company in the Mid-West region of the United States. The herds were selected due to utilizing nurse sow system as a method of handling large litters. A total of 105,364 nurse sows were used in this analysis. Nurse sow reproductive performance comprised the total number of piglets weaned in lactation, subsequent total piglets born TB consisting of live-born LB, still-born SB, and mummies. Extended lactation length was divided into three groups; 0-7d, 8-14d and 15-21d. Generalized linear models were applied to the data. During the same lactation period, nurse sows weaned on average 7.27% less piglets in the subsequent wean than in their first wean. P2 nurse sows weaned a significant number of piglets in their first wean event (?2 = 48.262, P < 0.001) compared to all other parities. Subsequent reproductive performance showed that live-born piglets decreased with increasing parity, whereas stillborns and mummies increased with increasing parity. Significant ?2=6867.282, P <0.001 live-born piglets were experienced among P1, 2, 3 nurse sows. Both stillborns and mummies were significant ?2=6867.282 P <0.001 among P 4, 5 and 6 nurse sows. Nurse sows that had an extended lactation length of 0-7d one week appeared to have a higher subsequent liveborn ?2=23.827, P< 0.001. Analyzing farm data helps producers gain more information on their farming systems and provide opportunities to improve nurse sow farm practices.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok előadáskivonat könyvrészlet Nurse-sow system large litters extended lactation total born piglets
Megjelenés:	2024 Allen D. Leman Swine Conference- Book of abstracts. - p. 100. -
További szerzők:	Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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