In order to evaluatedigestible lysine levels on the performance and carcass traits of castratedmale pigs from 60 to 100 days of age, 300 barrows with initial weight of 25.0±0.52kg were allotted in a completely randomized block design with five treatments(0.65, 0.75, 0.85, 0.95, and 1.05% digestible lysine levels), five replicates,and 12 pigs per experimental unit. There was no effect of digestible lysinelevels on average daily feed intake. The average daily gain increased and feedconversion improved quadratically with increasing dietary digestible lysinelevels. There was no effect of the digestible lysine levels on pig backfat thickness;however the carcass yield and quantity of meat increased quadratically withincreasing digestible lysine levels in the diets. The levels of 0.96 and 0.92%digestible lysine, corresponding to the estimated intakes of 18.69 and 17.69g/day provide the best results of weight gain and feed conversion, while levelsof 0.89 and 0.90%, corresponding to the estimated intakes of 17.28 and 17.52g/day, provide the best results of yield and quantity of meat in the carcassof barrows from 60 to 100 days of age.
