Abstract

A total of 1,440 pigs (initially 22.5 lb and 21 d after weaning) was used in a 21-d growth assay to determine the optimal lysine level to maximize growth performance of 22- to 45-lb pigs. Pigs were fed one of five dietary treatments with increasing dietary lysine (1.1, 1.2, 1.3, 1.4 and 1.5% true digestible lysine). All diets had the same soybean meal level with crystalline amino acids added to achieve the increasing lysine levels while maintaining a minimum ratio of all other amino acids to lysine. Average daily gain and feed efficiency improved linearly (P<0.01) with increasing dietary lysine. Although the response to lysine was linear (P<0.01), it would appear that pigs weighing between 22 and 45 lb require approximately 1.4% true digestible lysine (1.54% total lysine) to maximize growth performance.; Swine Day, 2003, Kansas State University, Manhattan, KS, 2003

Keywords: Swine day, 2003, Kansas Agricultural Experiment Station contribution, no. 04-120-S, Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service), 920, Pigs, Lysine, Growth, Swine

How to Cite:

Lenehan, N. A., Usry, J. L., Tokach, M. D., Goodband, R. D., Nelssen, J. L., DeRouchey, J. M. & Dritz, S. S., (2003) “The optimal true ileal digestible lysine requirement for 22 to 45 lb pigs”, Kansas Agricultural Experiment Station Research Reports 1(10), 67-70. doi: https://doi.org/10.4148/2378-5977.6813