Kansas Agricultural Experiment Station Research Reports

Article Title

Determining the optimal threonine:lysine ratio for the 25 to 50 lb pig

Authors

J R. Bergstrom
J A. Loughmiller
R E. Musser
W B. Nessmith Jr
Jim L. Nelssen
Michael D. Tokach
Robert D. Goodband
Steven S. Dritz

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; Early-weaned pigs; Amino acids; Threonine

Abstract

A 21-day growth trial was conducted to determine the threonine: lysine ratio necessary to optimize growth performance of the 25 to 50 Ib pig reared in a high-health, segregated early-weaning (SEW) system. Ten experimental diets, including two levels of lysine (.75% and 1.10% apparent digestible lysine) and five apparent digestible threonine:lysine ratios (40, 47.5, 55, 62.5, and 70%), were used in a 2 x 5 factorial arrangement. Growth performance was improved by feeding 1.10% rather than.75% digestible lysine. Also, results indicated that the apparent digestible threonine requirement for the SEW:-reared, 25 to 50 lb pig is approximately 55% of digestible lysine.; Swine Day, Manhattan, KS, November 21, 1996

Recommended Citation

Bergstrom, J R.; Loughmiller, J A.; Musser, R E.; Nessmith, W B. Jr; Nelssen, Jim L.; Tokach, Michael D.; Goodband, Robert D.; and Dritz, Steven S. (1996) "Determining the optimal threonine:lysine ratio for the 25 to 50 lb pig," Kansas Agricultural Experiment Station Research Reports: Vol. 0: Iss. 10. https://doi.org/10.4148/2378-5977.6516