PSXI-31 Methane emissions by cattle grazing tannin-containing legumes.

Tannin-containing legumes like birdsfoot trefoil (BFT) and sainfoin (SAIN) may enhance the efficiency of energy and protein use in ruminants relative to grasses and other legumes such as alfalfa (ALF). In addition, synergisms among diverse combinations of forages may further contribute to improve the efficiency of nutrient utilization, approaching values attained by feeding grain-based rations in confinement. We tested the effects of grazing...