The optimal threonine:lysine ratio to maximize growth performance of nursery pigs (2001)

Authors

B W. James
J C. Woodworth
Robert D. Goodband
Michael D. Tokach
Jim L. Nelssen
Joel M. DeRouchey
Steven S. Dritz

Keywords

Swine day, 2001; Kansas Agricultural Experiment Station contribution; no. 02-132-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 880; Swine; Threonine; Lysine; Nursery pigs

Abstract

A total of 210 pigs (initially 18.2 lb and 25 d of age) were used in a 21-d growth assay. The seven treatments consisted of a basal diet (14.1% CP) with increasing levels of threonine (45, 50, 55, 60, 65, and 70% of 1.07% apparent digestible lysine) and a negative control containing 0.97% lysine. Increasing dietary threonine improved feed efficiency; however, there was no improvement in growth performance between pigs fed 0.97 and 1.07% apparent digestible lysine. Therefore, these results suggest the requirement for apparent digestible threonine is approximately 60% of lysine for 18- to 40-lb pigs.; Swine Day, Manhattan, KS, November 15, 2001

Recommended Citation

James, B W.; Woodworth, J C.; Goodband, Robert D.; Tokach, Michael D.; Nelssen, Jim L.; DeRouchey, Joel M.; and Dritz, Steven S. (2001) "The optimal threonine:lysine ratio to maximize growth performance of nursery pigs (2001)," Kansas Agricultural Experiment Station Research Reports: Vol. 0: Iss. 10. https://doi.org/10.4148/2378-5977.6695