Efektifitas Pemberian Probiotik Padat pada Taraf yang Berbeda terhadap Fermentasi dan Kecernaan in vitro Ransum Sapi Potong

Abstract

The purpose of this study was to determine the effect of various levels of solid probioticsupplementation in beef cattle rations on VFA and NH3 concentrations, rumen microbial populations and nutrient digestibility. Fermentability experiment used factorial randomized block design 3x4 with 4 replications. Factor A was beef cattle ration without and with solid probiotic supplement: A1 = control diet, A2 = A1 + solid probiotic 0.25% w.w-1 and A3 = A1 + solid probiotic 0.5% w.w-1. Factor B was the incubation time: 0,1,2 and 3 hours. Digestibility trial used a randomized block design with three probiotic treatments (A1, A2 and A3) and four replications. The results showed that concentration of ammonia, total VFA, microbial protein sythesis and DM digestibility were not influenced by probiotic supplementation and incubation time, these treatment affected significantly total bacterial population. Protozoal population and OM digestibility was influented by solid probiotics supplementation. Polynomial orthogonal test indicated that A3 is the optimal treatment.