Analysis of the First Lactation Curve in Holstein Cows with Different Mathematical Models

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dc.authoridAKKOL, Suna/0000-0001-5123-7516
dc.authoridMemmedova Mikail, Nazire/0000-0002-8996-9330
dc.contributor.authorGok, Turgut
dc.contributor.authorMikail, Nazire
dc.contributor.authorAkkol, Suna
dc.date.accessioned2024-12-24T19:30:30Z
dc.date.available2024-12-24T19:30:30Z
dc.date.issued2019
dc.departmentSiirt Üniversitesi
dc.description.abstractThe shape of the lactation curve of cows as well as the total or 305 day milk yield is considered as an important criterion in the livestock farms. Five different. mathematical models. used in defining lactation curves were used in this study to fit first loci at ion curves of Holstein cattle. Total of 4172 weekly average milk yield of the first lactation of 104 cows between 2001-2008 years, was used for this aim. The models used in the study were; Wood; Morgan; tlompertz; Ali and Schaeffer and Dijkstra. The models' fit to t h e lactation curve has been examined and compared. Lactation curves also have been investigated according to the lactation years. The R-2, R-adj(2), AIC, BIC and MAPE values were used in the comparison of the models. The lowest AIC (-3.29), BIC (-3.12) and MAPE (0.55) and highest R-2 (0.99) and R-adj(2) (0.99) values were found for the Ali and Schaeffer model. This model was followed by the Dijkstra model. As a result of the study, it was determined that the most suitable models fir predicting the first lactation milk yield curves and curves features like maximum milk yield and days in milk to peak yield of Holstein cattle were Ali and Schaeffer and Dijkstra models.
dc.description.sponsorshipScientific Research Council of Siirt University [2016 SIUFEB-20]
dc.description.sponsorshipThis study was derived from the second author's master thesis supported by the Project No 2016 SIUFEB-20 of the Scientific Research Council of Siirt University.
dc.identifier.doi10.18016/ksutarimdoga.vi.514975
dc.identifier.endpage608
dc.identifier.issn2619-9149
dc.identifier.issue4
dc.identifier.startpage601
dc.identifier.trdizinid394882
dc.identifier.urihttps://doi.org/10.18016/ksutarimdoga.vi.514975
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/394882
dc.identifier.urihttps://hdl.handle.net/20.500.12604/7537
dc.identifier.volume22
dc.identifier.wosWOS:000471239900014
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.publisherKahramanmaras Sutcu Imam Univ Rektorlugu
dc.relation.ispartofKsu Tarim Ve Doga Dergisi-Ksu Journal of Agriculture and Nature
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241222
dc.subjectFirst lactation
dc.subjectHolstein cattle
dc.subjectMilk yield
dc.subjectNonlinear functions
dc.titleAnalysis of the First Lactation Curve in Holstein Cows with Different Mathematical Models
dc.typeArticle

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