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http://dx.doi.org/10.5187/JAST.2006.48.4.533

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

김경훈 (National Livestock Research Institute, RDA)
오영균 (National Livestock Research Institute, RDA)
이상철 (Ministry of Agriculture and Forestry)
신기준 (National Livestock Research Institute, RDA)
강수원 (National Livestock Research Institute, RDA)
문여황 (Jinju National University)
송만강 (Chungbuk National University)
Publication Information
Journal of Animal Science and Technology / v.48, no.4, 2006 , pp. 533-540 More about this Journal
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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