Lactation Curve Traits of Holstein Cows Raised at Polatlı State Farm
نویسندگان
چکیده
منابع مشابه
Estimation of Genetic Parameters for Lactation Curve Traits in Holstein Dairy Cows in Iran
The objectives were to estimate (co)variance components and genetic parameters for lactation curve traits in Holstein dairy cows in Iran. The used data were records on Holstein cows collected during January 2003 to December 2012 by the Animal Breeding Center of Iran (Karaj, Iran). In order to describe the lactation curve, an incomplete gamma function was fitted to 691200 test-day records on 962...
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in this study, the incomplete gamma function, an exponential function, a mixed-log function and a polynomial function were evaluated to describe the lactation curve in moroccan holstein-friesian dairy cows. data from 1990 to 1999, comprising 77130 monthly milk yields of 6029 dairy cows in 280 dairy herds, were used. edits were carried out by considering the lactation length (5 d and
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ژورنال
عنوان ژورنال: Kafkas Universitesi Veteriner Fakultesi Dergisi
سال: 2009
ISSN: 1300-6045
DOI: 10.9775/kvfd.2009.034-a