Effects of Addition of Acid Oil on Gas Production and Degradability of Concentrate Feeds

In vitro total gas, methane production and DM and OM degradabilities of five concentrates were determined by incubating Ig substrate at 39° C. Concentrates comprised of deoiled rice bran (DORB) and deoiled groundnut cake (DGNC) in 60:40 ratio (T₁), DORB and expeller DGNC in same ratio (T₂), DORB and DGNC in the same ratio with addition of 2.2% (T₃), 4.4% (T₄), and 6.6% (T₅) acid oil. Total gas production was 209.25 and 202.25 ml/g substrate/24h in T₁ and T₂ and decreased significantly (P<0. 05) on addition of acid oil. Average methane production (ml/g/24h) significantly (P<0.05) decreased from 15.13 (T₁) to 10.67 (T₅). Methane: Carbon dioxide proportion ranged between 4.22:95.78 (T₄ and T₅) to 5.52:94.48(T₁). DM and OM degradability varied from 76.88 (T₃) to 89.67 (T₁) and 77.93 (T₃) to 81.73 (T₂), respectively. DM and OM degradabilities of T₁ and T₂ were similar whereas that of T₃, T₄ and T₅ were lower (P<0.05). Results Indicate that addition of 2.2 4.4 and 6.6% acid oil in concentrates reduced the in vitro total gas and methane production alongwith DM and OM degradability.