The influence of the age of dairy cows first calving on their productive longevity
Journal Title: «Таврійський науковий вісник» - Year 2018, Vol 99, Issue
Abstract
The article presents the influence of the age of dairy breeds first calving on indicators of their lifelong usage. It was established that for elongation of duration of productive usage of Holstein and Ukrainian Blackand Redand White breeds their first calving should be planned at the age of 27,1-29,0 months, and to increase their lifelong productivity – at the age of 25,1-27,0 months. Early (up to 25 months) and late (over 33 months) calvings leads to a shorter lifelong usage and decrease of lifetime productivity. The influence of the age of the first calving on the indicators of duration of lifelong usage was 7,5-9,2, and on productivity lifetime indicators – 4,4-7,0%.
Authors and Affiliations
Н. П. Бабік, Є. І. Федорович
Keywords
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