Three ruminally cannulated Cheviot wethers (55.8 ± 5.8 kg BW) were used in a 3 × 3 Latin square
design to determine effects of supplementing Yucca schidigera, with or without nisin, on ruminal
fermentation patterns and N metabolism. The wethers were fed twice daily (08:00 and 16:00 h) with
a basal diet consisting of timothy silage and a concentrate (85:15 on a dry matter (DM) basis).
Dietary treatments were basal diet (control), basal diet plus 240 ppm (DM) of Y. schidigera per day
(YS), basal diet plus 240 ppm (DM) of Y. schidigera and 6 mg/kg BW0.75 of nisin per day (YN).
Results showed that YS and YN supplemented diets had lower (P