report

Determining the optimal isoleucine: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

Abstract

A 21-day growth trial was conducted to determine the isoleucine: lysine ratio necessary to optimize growth performance of the 25 to 50 lb nursery pig reared in a segregated early-weaning (SEW) system. Ten experimental diets, including two levels of lysine (.75% and 1.10% digestible lysine) and five apparent digestible isoleucine:lysine ratios (45, 50, 55, 60, and 65%), 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 isoleucine requirement for the SEW-reared, 25 to 50 lb pig is approximately .50% of digestible 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, Early-weaned pigs, Amino acids, Isoleucine

How to Cite: Bergstrom, J. R. , Loughmiller, J. A. , Musser, R. E. , Nessmith, W. B., Jr , Nelssen, J. L. , Tokach, M. D. , Goodband, R. D. & Dritz, S. S. (1996) “Determining the optimal isoleucine:lysine ratio for the 25 to 50 lb pig”, Kansas Agricultural Experiment Station Research Reports. 1(10). doi: https://doi.org/10.4148/2378-5977.6514