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Crude Protein Requirements for Maintenance of Hanwoo Steers by Protein Balance Trial

단백질 균형시험에 의한 한우 거세우의 유지 조단백질 요구량

  • 김경훈 (농촌진흥청 축산연구소) ;
  • 오영균 (농촌진흥청 축산연구소) ;
  • 이상철 (농림부) ;
  • 신기준 (농촌진흥청 축산연구소) ;
  • 강수원 (농촌진흥청 축산연구소) ;
  • 문여황 (진주산업대학교) ;
  • 송만강 (충북대학교)
  • Published : 2006.08.31

Abstract

This experiment was conducted to determine crude protein requirements for maintenance (CPm) of growing Hanwoo steers. Eighteen Hanwoo steers (173.7kg) were allocated randomly to diets with three levels of crude protein in the concentrate by replacing ground corn with corn gluten meal: 0% (LCP), 7.2% (MCP) and 14.2% (HCP), respectively. Hanwoo steers in each treatment were fed diets containing rice straw (20%) and concentrates (80%). CP intake was 5.5, 7.8 and 10.7g/BW0.75 for LCP, MCP and HCP, respectively. Protein balance was -0.05, 2.36 and 4.07g/BW0.75 for LCP, MCP and HCP, respectively. Intercept of the regression equation between CP intake and retained CP indicated that CPm was 5.56g/BW0.75. The estimate of CPm adopted by Korean Feeding Standard (2002) was almost 20% higher than that adopted by Japanese Feeding Standard for Beef Cattle (2000); this would need to be verified with more feeding trial data set including protein requirements for growth.

Keywords

Crude protein requirements;Hanwoo steers;Maintenance;Protein balance; Standard feeding

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