Abstract
ABSTRACT A dual-flow, continuous-culture system was used to assess the effects of energy supplementation with 4 pasture forages on in vitro ruminal fermentation characteristics. Twelve dietary treatments were tested in a split-plot design: energy supplementation (no concentrate, 30% ground corn, or 30% dried distilled grains with solubles) as a whole plot and pasture forages [tall fescue (TF) without N fertilizer, TF with N fertilizer (TF+NF), TF-alfalfa mixture, and TF-birdsfoot trefoil mixture (TF+BFT)] as a subplot. Three replicated runs lasted 9 d each, with 7 d for adaptation period and 2 d for data collection. The greatest total VFA and propionate concentrations (P
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