Abstract
A total of 360 pigs (averaging 13 d of age and 9.4 lb) was used to determine the effects of increasing dietary tryptophan:lysine ratio on the growth performance of segregated early-weaned (SEW) pigs. Two apparent digestible lysine levels (1. 15 and 1.50 %) and six apparent digestible tryptophan: lysine ratios (12.5, 15, 17.5, 20, 22.5 and 25%) were fed from d 0 to 16 after weaning. Lysine x tryptophan interactions were observed for ADG and F/G. Increasing the tryptophan: lysine ratio in the low lysine diets improved ADG and F/G in a quadratic manner. Increasing the tryptophan level had no effect in the high lysine diets. Results of this trial indicate that optimal apparent digestible tryptophan: lysine ratio is approximately 15 %.; Swine Day, Manhattan, KS, November 20, 1997
Keywords: Swine day, 1997, Kansas Agricultural Experiment Station contribution, no. 98-142-S, Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service), 795, Swine, SEW pig, Tryptophan, Lysine
How to Cite:
Loughmiller, J. A., Knabe, D. A., Hongtrakul, K., O'Quinn, P. R., Moser, S., Smith, J. W., II, Nelssen, J. L., Goodband, R. D. & Tokach, M. D., (1997) “Influence of dietary tryptophan levels on the growth performance of segregated early-weaned pigs (10 to 20 lb)”, Kansas Agricultural Experiment Station Research Reports 1(10), 45-47. doi: https://doi.org/10.4148/2378-5977.6533
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