effect of calf birth weight on some of the economically important traits in iran,s holstein dairy cow population
نویسندگان
چکیده
birth weight (bw) is the first trait recorded fllowing birth. it can influence the performance of thecow and as well impact the performance of the calf it,s duringits maturity. to investigate the effect ofa calf,s bw on the performance of holstein dairy cattle in iran, the records gathered between 1967 and2010 were obtained from the iranian animal breeding center. the data were then used to model theproductive and reproductive traits including calving to first insemination (cfi), first service toconception (fstc), calving interval (ci), and dystocia. bw of calves within each herd were groupedinto five categories based on standard normal distribution (z≤-0.8416, -0.8416
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عنوان ژورنال:
علوم دامی ایرانجلد ۴۴، شماره ۱، صفحات ۳۵-۴۳
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