Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Developing Model Equation to Subdivide Lysine Requirements into Requirements for Growth and Maintenance in Pigs

  • Yang, C.J. (Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University) ;
  • Lee, D.W. (Department Animal Science, College of Agriculture, Suncheon National University) ;
  • Chung, I.B. (National Livestock Research Institute, R.D.A.) ;
  • Cho, Y.M. (National Livestock Research Institute, R.D.A.) ;
  • Shin, I.S. (American Soybean Association) ;
  • Chae, B.J. (Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University) ;
  • Kim, J.H. (Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University) ;
  • Han, In K. (Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University)
  • Received : 1996.02.14
  • Accepted : 1996.11.15
  • Published : 1997.02.01
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Abstract

Purified diets containing 5 graded levels of lysine were fed to young and growing pigs to determine the lysine requirement for growth and maintenance. A model was developed to subdivide the lysine requirement for the maintenance from requirement for growth. From this model, the lysine requirement for growth was 18.018 and 19.431 g/kg live weight gain and the maintenance requirement was 0.115 and 0.033 g per unit of metabolic body size at each stage of growth, respectively. In the young pigs, the lysine requirement for growth was 0.950 g/g N gain and the maintenance requirement was 0.114 g per unit of metabolic body size. The breakpoint of plasma lysine concentrations was 8.695 and 13.464 g/d, respectively. Expected requirements obtained from these formulae were in general agreement with previous estimates. Based on weight gain vs N gain equation, about 7.92% of the retained protein was comprised of lysine as compared to 7.11%, the mean lysine content of pig muscle CP.

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