This present thesis studied on the role of eliminating the anaerobic fungi on metabolism and digestibility of rumen, the relation between the anaerobic fungal and the other rumen micrograms and the distinct ability of anaerobic fungi come from the runien contents and the feces. It includes of three parts. The first experiment studied on the effect of eliminating the anaerobic fungi on metabolism and digestibility of rumen in three native filtrated goat given roughage diets with hay. The,results showed that the ammonia concentration in the rumen fluid decreased greatly (p |