Abstract
Recycling of the waste bed logs used in the Shiitake cultivation into the resource of sawdust material for the cultivation of the commercial strain of Pleurotus ostreatus and the wild strain of Flammulina velutipes was examined. The yield of fruit bodies on the substrate using the saw dust from the waste bed logs was slightly lower than on the substrate using the sawdust from Abies sachalinensis Mast, which is a usual sawdust material in the Hokkaido area, in Japan, but it showed was almost equivalent productivity as compared with that of Quercus mongolica var. grosseserrata Rehd. et Wils.. However, the days required for fruiting initiation and for the harvest of the former substrate from waste bed logs were significantly shorter than on the latter sawdust substrate. These results suggest that the sawdust from the waste bed logs could be used as the resource for the cultivation of P. ostreatus and F. velutipes.
