Találati lista | Tudóstér

001-es BibID:	BIBFORM125935
Első szerző:	Osotsi, Joab Malanda (PhD Hallgató)
Cím:	Impacts of extended lactation length of nurse sows on their risk of removal due to failure to express estrus and conception / Joab Malanda Osotsi; Peter Balogh; Gabriella Novotnine-Danko
Dátum:	2024
Megjegyzések:	Nurse sows in most commercial pig production systems wean their litter, and they are used to nurse an additional second litter until weaning, thereby extending their lactation period. Extended Lactation Length (ELL) of nurse sows is associated with poor reproduction thereafter. Therefore, the aim of this study was to examine the risk associated with ELL, which resulted in the removal of a nurse sow from the herd. Records of 19739 removed nurse sows through failure to express heat and did not conceive were analyzed in SPSS statistics, and Chi-square test was used to test for group differences. Three groups of ELL in days were created based on available literature recommendations. The groups comprised of 0-7d n = 3306, 8-14d n = 9293, and 15-21d n = 7140. Results showed that when parity 2 and parity 6 nurse sows were extended for 0?7 days, they faced a high risk (?2 =13.312, P = 0.021) of removal due to conception failure and failure to return to estrus, respectively. When parity 2 and parity 5 nurse sows were extended for 8?14 days, they were at high risk (?2 =59.847, P<0.001) of removal because they failed to conceive and failed to show heat, respectively. Finally, when ELL was at 15?21 days, parity 4 and parity 5 nurse sows experienced a high risk (?2 =41.751, P<0.001) of removal due to failure to express estrus, whereas at the same period of time, parity 2 and parity 3 nurse sows were at a high risk (?2 =41.751, P<0.001) of removal due to failing to conceive. Return to estrus is considered the most important indicator of the reproductive soundness of any weaned sow. Failure to return to estrus risks the herd experiencing prolonged Non Productive Days (NPDs), which are costly, and subsequently risking the sow's stayability in the herd. Producers can use this information to make adjustments to nurse sow systems.
ISBN:	978-615-6457-52-3
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok előadáskivonat könyvrészlet Pig production parity no heat did not conceive culling
Megjelenés:	XXVII. Tavaszi Szél Konferencia 2024 - Absztrakt kötet / szerk. Hajdú Péter. - p. 55. -
További szerzők:	Balogh Péter (1970-) (agrármérnök) Novotniné Dankó Gabriella (1967-) (agrármérnök)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat Szerző által megadott URL
Borító:
Saját polcon: