The effect of Yucca schidigera extract on ruminal fermentation and parameters traits in sheep.

摘要

In a completely randomized block design experiment, 16 ruminally cannulated sheep (40+or-2.1 kg) fed a 50 concentrate:50 forage diet (DM basis) were given intraruminal doses of powdered Y. schidigera extract (YSE). Doses of 0 (control), 100, 200 or 300 mg/kg diet were given at 08:00 and 16:00 h. On 15, 16 and 17 days of the experimental period, ruminal contents were sampled at 0, 2, 4, 6 and 8 h after dosing, and blood samples were collected at the end of the experiment (18th and 19th days). Acidity was not affected (P>0.05) by the addition of YSE. Compared with the control, ruminal propionate concentration was increased by 29.4 and 29.8 (P>0.05) and the acetic acid concentration was decreased by 15.1 and 19.8 (P>0.05) at 4 and 6 h after YSE (300 mg/kg) dosing, respectively. Ruminal ammonia concentration in the first 2 h after feeding was higher (P0.05) after being fed for 19 days with different doses of YSE. The effect of YSE on ruminal ammonia concentration likely resulted from a decreased concentration of protozoan populations and, presumably, from ammonia binding by YSE..