Asian-Australasian Journal of Animal Sciences
- 제10권1호
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- Pages.122-133
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- 1997
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- 1011-2367(pISSN)
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- 1976-5517(eISSN)
DOI QR Code
Developing Model Equation to Subdivide Threonine 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.) ;
- Kim, Y.H. (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)
- 투고 : 1996.02.14
- 심사 : 1996.11.15
- 발행 : 1997.02.01
초록
Purified diets containing 5 graded levels of threonine were fed to young, growing and finishing pigs to determine the threonine requirement for growth and maintenance. A model was developed to subdivide the threonine requirement for the maintenance from the requirement for growth. From this model, the threonine requirement for growth was 7.733, 10.968 and 11.235 g/kg live weight gain and the maintenance requirement was 0.118, 0.048 and 0.024 g per unit of metabolic body size at each stage of growth, respectively. In the young pigs, the threonine requirement for growth was 0.388 g/g N gain and the maintenance requirement was 0.122 g per unit of metabolic body size. The breakpoint of plasma threonine concentrations was 3.995, 7.933 and 7.738 g/d, respectively. Expected requirements obtained from these formulae were in general agreement with previous estimates. Based on the weight gain vs N gain equation, about 4.24% of the retained protein was comprised of threonine and compared to 3.81%, the mean threonine content of pig muscle CP.
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