comparative study between Shami and Holstein cows for longevity and productive lifetime traits under subtropical conditions
O. Almasri,
S. Abou-Bakr,
M. A. M. Ibrahim
et al.
Abstract:This study aimed to compare the longevity and productive lifetime traits between Shami and Hol-stein cows under subtropical conditions, in addition to assess the effect of age at first calving (AFC), first lactation milk yield (FLMY), year and season of first calving on the studied traits in both breeds. The available data included 495 records for Shami and 1129 records for Holstein from birth to disposal date during the period from 1982 to 2014.The studied traits were lifespan (LS), productive life (PL), cow … Show more
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