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Effects of Weaning Age on Growth Performance, Feed Intake, Disease Occurrence of Hanwoo Calves and Reproductive Efficiency of Dams

한우 송아지 이유시기가 증체, 사료섭취량, 질병발생 및 어미소의 번식효율에 미치는 영향

  • Kwon, E.G. (National Livestock Research Institute, R.D.A.) ;
  • Park, B.K. (National Livestock Research Institute, R.D.A.) ;
  • Cho, Y.M. (National Livestock Research Institute, R.D.A.) ;
  • Han, M.H. (National Livestock Research Institute, R.D.A.) ;
  • Choi, C.Y. (National Livestock Research Institute, R.D.A.) ;
  • Lee, M.S. (National Livestock Research Institute, R.D.A.)
  • 권응기 (농촌진흥청 축산연구소) ;
  • 박병기 (농촌진흥청 축산연구소) ;
  • 조영무 (농촌진흥청 축산연구소) ;
  • 한만희 (농촌진흥청 축산연구소) ;
  • 최창용 (농촌진흥청 축산연구소) ;
  • 이명식 (농촌진흥청 축산연구소)
  • Published : 2007.04.30

Abstract

This study was conducted to investigate effects of weaning age on growth perforance, feed intake, disease occurrence and maternal reproductive efficiency in Hanwoo. Sixty experimental calves were allocated into two groups, early weaned (n=29, calf age 90 d, EW) and normally weaned (n=31, calf age 120 d, NW). Body weights and average daily gains during nursing and post-weaning periods were similar between two groups (p>0.05). Weaning age had no effect on calf starter, grass hay, dry matter, crude protein and TDN intakes of calves (p>0.05). Maternal calving interval in EW was shortened by 23 days compared to NW (p>0.05). Any difference in occurrence of disease was not observed between groups. Present results indicate that early weaning age has no negative effects on growth performance, feed intake or on disease occurrence in Hanwoo calves. And it has positive influence on maternal calving interval.

Keywords

Weaning age;Growth performance;Feed intake;Maternal reproductive efficiency;Hanwoo calf

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  1. A Survey on Calf Weaning Age in Hanwoo vol.53, pp.5, 2011, https://doi.org/10.5187/JAST.2011.53.5.497