The research was to define The Effect Of Lysine Supplementation On The Performance Of Arabian (Silver Brakel Kriel) Chick Starter Phase. This research conducted from April to December at Balai Pembibitan Ternak Unggul dan Ayam Sembawa Banyuasin. The Completely Randomized Design was used in this research. The level of was lysine that is L0 (100% basal diet), L1 (100% basal diet + 0,01% lysine), …