The objective of this research known The Digestibility of Rice Straw That Supplemented with Zn Lysinate in vitro. This research was held in laboratory of animal feed and nutrition, Faculty of Agriculture Sriwijaya University from June 2011-May 2012. Completely Randomized Design (CRD) with four treatment ada four replications, were used : Po (rice straw control), Pi (rice straw with Zn Lysinate …