Comparison of Six Different Mathematical Models to the Lactation Curve of Simmental Cows Reared in Kazova State Farm

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dc.contributor.authorÇilek, S.
dc.contributor.authorKeskin, I.
dc.date.accessioned2020-06-25T17:44:18Z
dc.date.available2020-06-25T17:44:18Z
dc.date.issued2008
dc.departmentKırıkkale Üniversitesi
dc.description.abstractThe aim of this study was to investigate the fitness of Incomplete Gamma (WD), Quadratic (Q), Cubic (C), Exponential (WIL), Mixed Log (ML) and Polynomial Regression (AS) models to the lactation curve of Simmental Cows. Data were collected from 752 Simmental cows raised on the Kazova state farm in Turkey. Milk yield was recorded monthly. Total milk yields estimated by the 6 models were very close to real total milk yield. The 6 models were found to be adequate for estimation of milk yield. ML model underestimated the peak yield significantly. The differences between peak yields of the models and real peak yield were statistically insignificant (p > 0.05) and they were ranged from 13.19-18.591. Cubic models forecasted peak time earlier than real peak time. The differences between the persistency values of the 6 models were insignificant (p > 0.05). The 6 model's persistency value was nearly equal to real persistency value. W values of the 6 models changed from 92.69-95.14%. The highest value of R(2) was found in AS model. Furtermore, least value of MSPE was found in AS model. Consequently, the entire model's showed the best fit to the lactation data of Simmental cows and allowed a suitable definition of the lactation curve.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.endpage1319en_US
dc.identifier.issn1680-5593
dc.identifier.issue10en_US
dc.identifier.scopus2-s2.0-53949116792
dc.identifier.scopusqualityN/A
dc.identifier.startpage1316en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12587/4072
dc.identifier.volume7en_US
dc.identifier.wosWOS:000262562100027
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMedwell Onlineen_US
dc.relation.ispartofJournal Of Animal And Veterinary Advances
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSimmentalen_US
dc.subjectcowsen_US
dc.subjectlactation curveen_US
dc.subjectmilk yielden_US
dc.subjectmathematical modelen_US
dc.titleComparison of Six Different Mathematical Models to the Lactation Curve of Simmental Cows Reared in Kazova State Farmen_US
dc.typeArticle

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