Fermentabilitas Pakan Berbasis Amoniasi Jerami Padi Dengan Sumber Protein Yang Diproteksi Di Dalam Rumen Secara in Vitro (in Vitro Ruminal Fermentability of Ammoniated Rice Straw Based Feed with Supplementation of Protected Protein)

The research aimed to examine in vitro ruminal fermentability of ammoniated rice straw based feed with supplementation of protected protein. This research used completely randomized design with pattern of factorial 2 x 5 and three replications. The first factor was rice straw without ammoniation (J0) and rice straw ammoniated (J1). The second factor was supplementation of tannin protected protein at 0% (P0), 5% (P1), 10% (P2), 15% (P3), and 20% (P4) in feed. Collected data were statistically tested by analysis of variance with factorial pattern in completly randomized design, followed by Duncan's multiple range test. The result showed, interactive effect of ammoniation treatment and supplementation protected protein was able to increase NH3 production dan total protein production. The average of parameters were VFA concentration : 81.33–151.67 mM; NH3 production :8.19 – 14.65mg/dl; total protein production: 173.11–237 mg/g; and organik matter degradability: 45.81–67.48 %. Conclusion of this research was ammoniation treatment on rice straw and supplementation of tannin protected protein treatment were able to interact to increase NH3 production and total protein production in feed