Dietary total sulfur amino acid requirement for optimal growth performance and carcass characteristics in finishing gilts

Authors

J A. Loughmiller
Michael D. Tokach
Evan C. Titgemeyer
I H. Kim
J R. Bergstrom
J W. Smith II
Robert D. Goodband
Jim L. Nelssen

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; Growth; Total sulfur amino acids

Abstract

Finishing gilts (initially 163 lb) were fed .58% total lysine (.50% apparent digestible) and total sulfur amino acid (TSAA) concentrations of .26, .285, .31, .335, and .36% (.225 to .325% apparent digestible). These values represent TSAA: lysine ratios of 45, 50, 55, 60, and 65%. Results suggest a linear decrease in ADG and ADFI along with poorer F/G with increasing TSAA levels. However, gilts fed .285% TSAA (50% of lysine) had the best ADG and F/G. No effect was observed on any carcass criteria. Based on the results of this study, the TSAA requirement is not greater than .285% total (.25% apparent digestible) or approximately50% of the lysine requirement.; Swine Day, Manhattan, KS, November 21, 1996

Recommended Citation

Loughmiller, J A.; Tokach, Michael D.; Titgemeyer, Evan C.; Kim, I H.; Bergstrom, J R.; Smith, J W. II; Goodband, Robert D.; and Nelssen, Jim L. (1996) "Dietary total sulfur amino acid requirement for optimal growth performance and carcass characteristics in finishing gilts," Kansas Agricultural Experiment Station Research Reports: Vol. 0: Iss. 10. https://doi.org/10.4148/2378-5977.6545