Estimation of Adjustment Factors for Standardizing Lactations to Mature Age and 305 Day of Milk Yield of Holstein Cattle Reared at Polatli State Farm in Turkey

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dc.contributor.authorCilek, Süleyman
dc.date.accessioned2020-06-25T17:44:23Z
dc.date.available2020-06-25T17:44:23Z
dc.date.issued2008
dc.departmentKırıkkale Üniversitesi
dc.description.abstractIn this study, adjustment factors of lactation milk yield to mature age and 305 day of milk yield were estimated for Holstein cattle reared in Polatli State Farm. A total of 3184 lactation records of Holstein cattle reared in Polatli State Farm between 1993 and 2006 were used. The factors for standardizing incomplete lactations to 305 day were estimated by taking into consideration nine calving age groups (2, 3, 4, 5, 6, 7, 8, 9, 10 and older years of age). The factors for standardizing to mature equivalent estimated by polynomial regression method are between the 20th month and 145th and older. For lactations less than 305 days, average of adjustment factors for 30, 60, 90, 120, 150, 180, 210, 240, 270, 300 and 305th days, were 8.70, 4.32, 2.82, 2.14, 1.69, 1.48, 1.31, 1.18, 1.09, 1.01 and 1.00, respectively. For lactations more than 305 days, the average of adjustment factors for 310,340, 370,400,430,460,490, 520, 550, 580 and 600th days were 0.99,0.93,0.88,0.84, 0.90, 0.77,0.74,0.72, 0.69, 0.67 and 0.65, respectively. Adjustment factors were estimated as 1.14 and 1.51 for the youngest cows (calving in 24th month) and for oldest cows (calving in 145th month), respectively.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.endpage1060en_US
dc.identifier.issn1680-5593
dc.identifier.issue9en_US
dc.identifier.scopus2-s2.0-53949099194
dc.identifier.scopusqualityN/A
dc.identifier.startpage1056en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12587/4092
dc.identifier.volume7en_US
dc.identifier.wosWOS:000262561800004
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.subjectCattleen_US
dc.subjectholsteinen_US
dc.subjectmilk yielden_US
dc.subjectadjustment factorsen_US
dc.subject305 dayen_US
dc.subjectmature ageen_US
dc.titleEstimation of Adjustment Factors for Standardizing Lactations to Mature Age and 305 Day of Milk Yield of Holstein Cattle Reared at Polatli State Farm in Turkeyen_US
dc.typeArticle

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