Bergstrom, J.R.Owen, K.Q.Richert, B.T.Nessmith, W.B. Jr.Nelssen, Jim L.Tokach, Michael D.Goodband, Robert D.Dritz, Steven S.2010-03-102010-03-102010-03-10http://hdl.handle.net/2097/3133A 35-day growth trial was conducted to determine the threonine: lysine ratio necessary to optimize growth performance of the segregated early-weaned (SEW) pig. Twelve experimental diets included two levels of lysine (1.15% and 1.5% digestible lysine) and six digestible threonine:lysine ratios (50, 55, 60, 65, 70, and 75%) in a 2 x 6 factorial arrangement. Growth performance was improved by feeding 1.5% digestible lysine, rather than 1. 15% digestible lysine. However, growth performance was not improved by increasing dietary threonine. These data indicate that the threonine requirement is no more than 50% of digestible lysine.SwineEarly-weaned pigsAmino acidsThreonineConference paper