Descripción: “...Forty 67.63 ± 2.53  kg Landrace  x Large White  x Pietrain crossbred  pigs were  used  in a randomised  complete  block  experimental design involving four treatments,  five repeats  and two animals per experimental  unit. The treatments  consisted  of a base isoproteic-isocaloricration having four L-lysine supplementation levels (0.000, 0.191, 0.382 and 0.584), resulting in rations containing0.53, 0.68, 0.83 and 0.98% digestible lysine. ...”