A. Taghizadeh , Z. Nemati , H. Janmohamadi , N. Pirani , The Determination of Fermentation Characteristics of Treated and Untreated Barley Grain Using Gas Production Technique, Journal of Animal and Veterinary Advances, Volume 6,Issue 12, 2007, Pages 1395-1397, ISSN 1680-5593, javaa.2007.1395.1397, (https://makhillpublications.co/view-article.php?doi=javaa.2007.1395.1397) Abstract: In order to determine of fermentation characteristics of treated and untreated barley grain the experiment was carried out. The treatment contain Untreated Barley Grain (UBG), Teated Barley Grain at 120°C, 5´ (TBG 1) and 20´ (TBG2) and 100 C, 5´ (TBG 3) and 100°C, 20´ (TBG 4). The gas production was measured at 2, 4, 8, 16, 24, 36 and 48 h. The gas production data were fitted by the equation of P =A(1-e-ct). The gas production of treated barley grain at 48 h was lower than the other treatments (p<0.05). Also the gas production of soluble and insoluble fractions (A) and rate of gas production in most of treated barley grain were lower than the other treatments (p<0.05). Treatment of barley grain by heat had low gas production resulting and improved efficiencies of barley grain and increased by pass protein. Keywords: Barley grain;heat treated;gas production;fermentation;TBG