Abstract

Sixty four gilts (initially 120 lb) were used to evaluate the effects of increasing total sulfur amino acid (TSAA):lysine ratios on growth performance and carcass characteristics. Diets included two levels of lysine (.55% and .70% total lysine) and three TSAA:lysine ratios (60, 65, and 70% of lysine) arranged in a 2 x 3 factorial. A tendency for a lysine x TSAA interaction was observed for ADG and ADFI. Increasing TSAA:lysine ratio decreased ADG and ADFI in pigs fed .55% lysine; however, ADG and ADFI were increased in pigs fed .70% lysine and 65% TSAA:lysine. Pigs fed .70% lysine had improved ADG, F/G and 10th rib fat depth compared to those fed .55% lysine. However, no effects were observed with increasing TSAA: lysine ratios. These results suggest that the TSAA requirement of finishing pigs is not greater than 60% of total lysine.; Swine Day, Manhattan, KS, November 21, 1996

Keywords: Swine day, 1996, Kansas Agricultural Experiment Station contribution, no. 97-142-S, Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service), 772, Swine, Finishing pigs, Methionine, Amino acids

How to Cite:

Loughmiller, J. A., Smith, J. W., II, Bergstrom, J. R., Goodband, R. D., Tokach, M. D. & Nelssen, J. L., (1996) “Evaluation of the total sulfur amino acid requirement of finishing pigs”, Kansas Agricultural Experiment Station Research Reports 1(10), 130-132. doi: https://doi.org/10.4148/2378-5977.6546