Paper ID: 87
THE EFFECTS OF CATFISH OIL SUPPLEMENTATION AS UNSATURATED FATTY ACID SOURCE ON BALI COW GAS PRODUCTION KINETICS, IN VITRO DRY MATTER DIGESTIBILITY, AND IN VITRO ORGANIC MATTER DIGESTIBILITY IN VITRO
Danang Nur Cahyo1, Lies Mira Yusiati1*, Asih Kurniawati1, Chusnul Hanim1, Muhlisin1
1Department of Feed and Animal Nutrition, Faculty of Animal Science, Universitas Gadjah Mada, Yogyakarta, Indonesia
Catfish oil (CFO) was a byproduct of catfish meal, which has high proportion of unsaturated fatty acids. The purpose of this study was to investigate the effects of catfish oil supplementation on gas production kinetics, dry matter, and organic matter digestibility in vitro with Bali cow rumen fluid. The materials used in this study consisted of Bali cow rumen fluid as inoculum, and treatment diets. The design of this study was a completely randomized design with 5 treatment consist of T0 (control diet: Pennisetum purpupoides (60%): wheat pollard (40%): soybean meal (10%)), T1 (T0 + 2% DM CFO), T2 (T0 + 4% DM CFO), T3 (T0 + 6% DM CFO), T4 (T0 + 8% DM CFO) and 3 replication. Gas production technique described by Menke and Steingass was used in this study with 48 hours of incubation time. Gas produced at 0, 2, 4, 8, 12, 24, 36, 48 hours after fermentation were recorded. Gas production kinetics was analyzed by Fit Curve application. The result showed that CFO supplementation at the level of 8% significantly (P<0,05) decreased total gas production, b fraction value, in vitro dry matter digestibility (IVDMD), and in vitro organic matter digestibility (IVOMD), but there were insignificant (P>0,05) effect on a and c fraction value. It could be concluded that supplementation catfish oil at the level of 6% DM in the Bali cow diet did not give a negative effect on rumen substrates degradation.