LIVE WEIGHT AND SEMEN PRODUCTION OF SIRES WITH VARIOUS GROWTH RATES
Journal Title: Науковий вісник Національного університету біоресурсів і природокористування України. Серія : Технологія виробництва і переробки продукції тваринництва - Year 2017, Vol 1, Issue 271
Abstract
Analysis of the relationship between live weight and semen production of sires characterized by different growth intensityhas been performed. High average daily gains of the bulls of Ukrainian beef breed from 8 to 12 months have led to increased live weight with further reduction of semen quality. Live weight of the bulls of Chernigiv breed type was higher as compared to their contemporaries with higher average daily gains from 12 to 36 months of age by 7.3 and 15,3 %, and as compared to Prydniprovskii type this difference varied from 11.4 to 19.7 %. Bulls with higher growth rates will have lower spermatozoa concentration in ejaculate by 5.4 and 23.1 %.
Authors and Affiliations
Yu. I. Tokar, A. M. Ugnivenko
Keywords
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