Advances in dairy Research
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Wondossen A

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• Research Article
  Reproductive Performance of Holstein Friesian Dairy Cows in a Tropical Highland Environment
  Author(s): Wondossen A, Mohammed A and Enyew NegussieWondossen A, Mohammed A and Enyew Negussie
  
  Any genetic improvement in dairy cattle requires information on reproductive performance in the given population. This study was carried out to evaluate the effect of non-genetic factors on reproductive performance traits of Holstein Friesian dairy cattle maintained under tropical highland environment. The data used in this study included records of cows that calved between 1979 and 2013. The overall least squares mean of Age at First Calving (AFC), Calving Interval (CI), Days Open (DO) and Number of Service Preconception (NSC) were 39.42 ± 0.41, 469.19 ± 7.88, 179.89 ± 6.82 and 1.9 ± 0.05, respectively. All sources of variation parity sire origin and period have significant effect on most reproductive traits considered. In general, in this study the reproductive performance of Holstein Friesian cows under tropical management condition were poor. This calls a plann.. View More»
  DOI: 10.4172/2329-888X.1000203

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