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UPT,dana. AFC, days. 795.53. 10.04. 11.24**. Service period, i.e. interval between calving and subsequent fertilization represents one of the most important ...

Biotechnology in Animal Husbandry 24 (3-4), p 1-8, 2008 Publisher: Institute for Animal Husbandry, Belgrade-Zemun

ISSN 1450-9156 UDC 636.237

THE EFFECT OF BREEDING REGION ON CERTAIN FERTILITY PARAMETERS OF SIMMENTAL COWS** V. Pantelić1*, Z. Skalicki2, M. M. Petrović1, S. Aleksić1, D. OstojićAndrić1 , Ž. Novaković1 1

Institute for Animal Husbandry, Belgrade-Zemun, 11080 Zemun Faculty of Agriculture, Zemun * Corresponding author:Vlada Pantelić, e-mail: [email protected] **Original scientific paper - Originalni naučni rad 2

Abstract: Field of cattle reproduction is the most important production stage because it is in this stage that heads of cattle for renewal of herd are provided, also for production of milk and fattening, i.e. production of meat. In this study, the effect of breeding region on variability of age at calving and duration of service period in 3.641 first calving Simmental cows under control, reared on private farms on the territory of Republic of Serbia was investigated. In the analysis of collected data the method of Least Squares was used LSMLMW (Harvey 1990) according to following formula: Ykm = μ + Rk + ekm. Regions had highly significant effect (P