Substitusi rumput gajah dengan rumput laut coklat (Sargassum polycys-tum) terhadap produk metabolisme rumen dan kecernaan nutrien secara in vitro

Abstract

This research was conducted to assess the level of substitution of napier grass with brown seaweed ( Sargassum polycystum ) in diet of the goat on rumen metabolism product and nutrient digestibility in vitro. The experimental design used was completely randomized design with 4 treatments and 4 replications. Feed treatments consisted of T1 (control) = 50% napier grass + 50% concentrate; T2 = napier grass 37,5% + S. polycystum 12,5% + 50% concentrate; T3 = napier grass 25% + S. polycystum 25% + 50% concentrate; T4 = napier grass 12,5% + S. polycystum 37,5% + 50% concentrate. The result, substitution of napier grass with brown seaweed ( S. polycystum ) did not significant (P>0.05) effect on pH, N-NH 3 , VFA total, acetate, propionate, butyrate, adenosine triphosphate (ATP), dry matter digestibility, organic matter digestibility, and neutral detergent fiber digestibility. It is suggested that brown seaweed ( S. polycystum ) could replace napier grass on goat feed at up to 37,5%.