Effect of Superblock Supplementation to Native Grass Based Diet on Rumen Fermentation In Vitro

Abstract

Superblock is the new generation of feed supplement which formulated from rice bran, molasses, soybean meal, urea, salt, and lacta-mineral. In vitro experiment was carried out to evaluate the effect of Superblock, supplemented in native grass based diet. Treatments evaluated were: C (60% native grass + 40% rice bran ) and S (C + Superblock). Experimental design of this study was completely randomized design with two treatments and six replication. Gas production measurements were performed at 0, 2, 4, 6, 8, 10, 12, 24, and 48 h. Methane and carbondioxide concentration were measured after 48 h incubation. In vitro organic matter digestibility (IVOMD), energy metabolism (EM) and total volatile fatty acids (TVFA) were calculated from the total gas production after 24 h incubation. Superblock supplementation in native grass based diet could increase optimum total gas production (13.37%), IVOMD (8.45%), EM (7.28%), TVFA (10.41%) and methane production (4.67%). It was concluded that Superblock supplementation to native grass basal diet increased total gas production, IVOMD, EM and TVFA production. However, methane production also increased which is unwilling result therefore more appropiate strategy is needed to overcome this problem.