Bioavailability of dietary amino acids in swine fitted with ileal T-cannula
1989
Park, B.S. | Yoon, C.S. | Lee, N.H. (Korea Food Research Inst., Banwol (Korea Republic)) | Chee, K.M. (Korea Univ., Seoul (Korea Republic). Coll. of Agriculture)
Bioavailability of dietary amino acids were measured in swine fitted with ileal T-cannula. Three swines with average body weight 50 +- 1.7Kg were fed diets containing soybean meal or fish meal as the only N sources. After 5 days of preliminary feeding period, ileal digesta and anal excreta were collected for two consecutive days. N-free diet composed of glucose, corn oil, alpha-cellulose and vitamin-mineral premix were also fed to evaluate amount of endogenous amino acids. Amount of amino acids disappeared were generally larger in fecal excreta than in ileal digesta with a significant difference (p 0.05) for fish meal. Apparent availabilities of amino acids in soybean meal and fish meal were 86.7 and 83.4 % for ileal digesta, and 91.7 and 91.1 % for feces, respectively. True availabilities of amino acids in soybean meal and fish meal were 89.5 and 86.5 % for ileal diegesta, and 92.7 and 92.2 % for fecal excreta, respectively. Amount of amino acids in soybean meal appeared better utilized than those in fish meal evaluated in ileal digesta. No such trend, however, was observed in fecal excreta. It appeared that in vivo bioavailability of dietary amino acids in swine should be studied with ileal digesta rather than fecal material
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