Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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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.)
  • Published : 2007.04.30
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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.

본 연구는 한우 송아지의 이유시기별 발육, 사료섭취량, 질병발생 및 어미소의 번식효율에 미치는 영향을 조사하기 위하여 수행되었다. 시험축은 축산연구소에서 자체 생산된 한우 송아지 60두를 공시하여 이유시기별로 조기이유(EW, 생후 3개월령)와 관행이유(NW, 생후 4개월령)에 각각 29 및 31두씩 배치하여 두 개의 시험구를 두었다. 송아지의 포유기 및 이유후 체중과 일당증체량은 이유시기에 따른 차이는 없었다(p>0.05). 또한 인공유, 목건초, 건물, 조단백질 및 TDN 섭취량도 이유시기에 의한 영향은 없었다(p>0.05). 어미소의 분만간격은 관행이유 시험구에 비해 조기이유 시험구에서 23일 정도 단축되는 경향을 보였다(p>0.05). 한편 이유시기에 따른 발생 질병의 종류와 발병율은 시험구간 차이가 없는 것으로 조사되었다. 따라서 이유시기 단축이 한우 송아지의 성장, 사료섭취량 및 질병 발생에 미치는 부의 영향은 없었을 뿐만 아니라 어미소의 분만간격을 단축시키는데 효과가 있는 것으로 사료된다.

Keywords

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