Effects of Dietary Replacement of Rice Straw with Fermented Spent Mushroom (Flammuliua velutipes) Compost on Availability of Feeds in Sheep, and Growth Performance of Hanwoo Steers

Metabolic trial with 3 fistulated sheep was conducted in a 3×3 Latin square design and feeding trial with 24 Hanwoo steers in 12 month of age for 20 months was conducted to investigate the replacing effect of rice straw with fermented spent mushroom(Flammuliua velutipes) compost (FSMC) on fermentation characteristics, ruminal effective degradabilty and whole tract digestibility of nutrients in sheep, and to examine the growth performance of Hanwoo steers. Experimental diets for the metabolic trial with sheep were commercial concentrates and rice straw in the ratio of 70: 30(CON, DM basis). Same concentrate with 30% FSMC and 70% rice straw(FSMC-30) and 60% FSMC and 40% rice straw(FSMC-60). Diets for Hanwoo steers in three treatments were same as for metabolic trial in replacing ratio of rice straw with FSMC. pH of rumen fluid in sheep was not affected by FSMC. Ammonia-N content in the rumen fluid was highest in the sheep fed FSMC-60 at 3h(P