Damasto PE, Sudiyono, Subagyo YBP. 2008. Influence of temulawak (Curcuma xanthorrhiza) flour addition in ration to digestibility of dry matter and organic matter on male local lamb. Biofarmasi 6): 52-57. Lamb livestock is one of supplier from animal protein in Indonesia, which potential to be developed, but the management system used was still traditional. One of important factor in lamb livestock productivity is feed, therefore the fulfillment of feed, either from its quantity and quality, is absolutely necessary. Besides that, to increase consumption, growth, digestibility, health, and feed efficiency, the livestock needs the existence of feed additive. Feed additive is a special substance that intending to be enhanced in livestock ration for its certain purpose. In this research, feed additive substance was temulawak (Curcuma Xanthorrhiza Roxb) flour. The purpose of this research was to find out the influence of temulawak flour addition in ration to the digestibility of dry matter and organic matter on male local lamb. This research had been done from September 13th, 2007 until November 23rd, 2007 on Minifarm of Animal Husbandry Program of Agriculture Faculty, Sebelas Maret University, which located in Jatikuwung, Gondangrejo, Karanganyar, Central Java. The research used a Completely Randomized Design (CRD). This research used 16 lambs with 12.07±1.11 kg of body weight, divided into four treatments, i.e. P0, P1, P2, and P3, each treatment was consisted of four replications, and each replication used one male local lamb. The treatments were P0 = 0% temulawak flour (as a control), P1 = 0.5% temulawak flour, P2 = 1% temulawak flour, and P3 = 1.5% temulawak flour. The parameters observed were dry matter intake, organic matter intake, dry matter digestibility, and organic matter digestibility. The result of this research for each treatment (P0, P1, P2, P3) on dry matter intake was 681.97, 667.48, 695.72, and 688.04 grams/lamb/day, on organic matter intake were 589.91, 576.64, 600.76, and 595.68 grams/lamb/day, on dry matter digestibility were 64.76, 63.20, 68.27, and 68.39%, and on organic matter digestibility were 70.63, 68.75, 73.15, and 73.44%. Analysis variance showed the different result was not significant at all of parameters and treatments. The conclusion was the addition of temulawak flour until the level of 1.5% from total ration had no effect on dry matter intake, organic matter intake, and dry matter and organic matter digestibility on male local lamb.