Fitness of four different mathematical models to the lactation curve of Brown Swiss cows in Konya Province of Turkey

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dc.contributor.authorKeskin, Ismail
dc.contributor.authorDag, Birol
dc.contributor.authorSariyel, Vahdettin
dc.date.accessioned2020-03-26T17:38:43Z
dc.date.available2020-03-26T17:38:43Z
dc.date.issued2009
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractKeskin, I., Dag, B. and Sariyel, V. 2009. Fitness of four different mathematical models to the lactation curve of Brown Swiss cows in Konya Province of Turkey. Can. J. Anim. Sci. 89: 195-199. The aim of this study was to investigate the fitness of Incomplete Gamma (WD), Exponential (WIL), Mixed Log (MIL) and Polynomial Regression (AS) models to the lactation curve of Brown Swiss Cows. Data were collected from 143 Brown Swiss cows raised on the Altinova State Farm in Konya Province, Turkey. Milk yield was recorded monthly, and milk records were started at the third week of lactation (mean = 16.9 day, SD = 0.7). Total milk yields estimated by the four models were very close to real total milk yield. The models were found to be adequate for estimation of milk yield. The MIL model underestimated the peak yield significantly. The differences between peak yields of the models and real peak yields were not significant and ranged from 27.70 to 29.01 L. All models forecasted peak time earlier than real peak time. The differences for the persistency values of the four models were significant. The AS model's persistency value was nearly equal to the real persistency value (77.56 vs. 77.59%). R-2 values of the models changed from 86.05 to 97.95%. The AS model gave the best R-2 and the least MSPE values. Consequently, the AS model showed the best fit to the lactation data of Brown Swiss cows and allowed a suitable definition of the lactation curve.en_US
dc.description.sponsorshipUniversity of Selcuk (BAP), Konya, TurkeySelcuk Universityen_US
dc.description.sponsorshipThe authors thank the staff of the State Farm of Altinova, Konya, Turkey. This research was funded in part by a grant from the University of Selcuk (BAP), Konya, Turkey.en_US
dc.identifier.doi10.4141/CJAS08038en_US
dc.identifier.endpage199en_US
dc.identifier.issn0008-3984en_US
dc.identifier.issue2en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage195en_US
dc.identifier.urihttps://dx.doi.org/10.4141/CJAS08038
dc.identifier.urihttps://hdl.handle.net/20.500.12395/23556
dc.identifier.volume89en_US
dc.identifier.wosWOS:000268624900002en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAGRICULTURAL INST CANADAen_US
dc.relation.ispartofCANADIAN JOURNAL OF ANIMAL SCIENCEen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectBrown Swissen_US
dc.subjectcowsen_US
dc.subjectlactation curveen_US
dc.subjectmilk yielden_US
dc.subjectmathematical modelen_US
dc.titleFitness of four different mathematical models to the lactation curve of Brown Swiss cows in Konya Province of Turkeyen_US
dc.typeArticleen_US

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