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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  );
  • 초록

    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.


  • 주제어

    Lysine .   Requirement .   Maintenance .   Growth .   Body Composition .   Plasma Concentration .   Purified Diets .   Pigs.  

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