Evaluation of automatic milking system variables in dairy cows with different levels of lactation stage and reproduction status

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dc.authoridTusas, Saulius/0000-0001-7909-1248
dc.contributor.authorJuozaitiene, Vida
dc.contributor.authorJuozaitis, Arunas
dc.contributor.authorZymantiene, Judita
dc.contributor.authorSpancerniene, Ugne
dc.contributor.authorAntanaitis, Ramunas
dc.contributor.authorZilaitis, Vytuolis
dc.contributor.authorTusas, Saulius
dc.date.accessioned2024-12-24T19:27:48Z
dc.date.available2024-12-24T19:27:48Z
dc.date.issued2019
dc.departmentSiirt Üniversitesi
dc.description.abstractIn this study, we hypothesized that differences of automatic milking systems (AMS) variables in dairy cows during estrus and through diverse stages of lactation can be suggested as alternative indicators to support the pregnancy in dairy farms using automatic milking systems. The key objectives were: (1) to determine the variation of automatic milking system indicators during lactation and to estimate the relationship with reproduction status in dairy cows; (2) to test the hypothesis that milking traits of cows can be influenced by estrus and conceiving, and can be used as a predictor of the likelihood of reproductive success in dairy herds. Estrus synchronization was performed in 368 healthy Lithuanian Black and White cows. All cows (n = 368) were synchronized and inseminated for the first time on the 91st day in milk (DIM). Cows not pregnant (17.39%) were synchronized and inseminated again at 132 DIM. After the first insemination pregnant (n = 304) cows were identified as group 1, after the second insemination pregnant (n = 58) cows - as group 2. Overall, 12 01 713 records of udder quarters in cows from 5 to 305 DIM were evaluated. The results revealed the reduction in milk yield during estrus 11.05% on 91 DIM and 13.89% on 132 DIM (P < 0.001) and an increment in milk flow traits in cows after 91 DIM (P < 0.05), also a slight decline in milk flow traits on 132 DIM. Furthermore, milking frequency (MF) of cows decreased significantly (P < 0.001) after conceiving. The interval between milkings (MI) increased (40.30%) during estrus of cows in group 1 (P < 0.001), and thereafter gradually increased, however in group 2 there was a temporary increment (6.06%) on the 91 DIM and steady rise (42.13%) on 132 DIM was noticed. The results highlight that changes in AMS indicators of cows may be considered as an additional tool for improvement of reproductive management in dairy herds, but further research-based studies are necessary before practical application.
dc.identifier.doi10.1017/S0022029919000670
dc.identifier.endpage415
dc.identifier.issn0022-0299
dc.identifier.issn1469-7629
dc.identifier.issue4
dc.identifier.pmid31744561
dc.identifier.scopus2-s2.0-85076371553
dc.identifier.scopusqualityQ1
dc.identifier.startpage410
dc.identifier.urihttps://doi.org/10.1017/S0022029919000670
dc.identifier.urihttps://hdl.handle.net/20.500.12604/6806
dc.identifier.volume86
dc.identifier.wosWOS:000509709900007
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherCambridge Univ Press
dc.relation.ispartofJournal of Dairy Research
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241222
dc.subjectAutomatic milking
dc.subjectcows
dc.subjectestrus
dc.subjectmilking traits
dc.subjectpregnancy
dc.titleEvaluation of automatic milking system variables in dairy cows with different levels of lactation stage and reproduction status
dc.typeArticle

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