The Utilization of Adzuki Bean-paste Refuse for Sawdust Cultivation of Pleurotus ostreatus

Abstract

The suitability of adzuki-bean paste refuse, as the medium material in the sawdust based cultivation of Pleurotus ostreatus, was investigated. By using adzuki-bean paste refuse as a nutritional supplement, the number of fruit-bodies and fruit-body yield decreased as the substitutive ratio of adzuki-bean paste refuse for either rice bran or wheat bran became higher. On the other hand, by using adzuki-bean paste refuse as a substrate, the fruit-body yield increased on the medium which was replaced sawdust of Cryptomeria japonica (Sugi) by adzuki-bean paste refuse. In up to 75% of the substitutive ratio, the fruit-body yield increased as the substitutive ratio of adzuki-bean paste refuse became higher. On the medium substituted with a 75% substitutive ratio, the fruit-body yield was 1.2 times as much as that on the medium that only used sawdust of C.japonica. However, the fruit-body yield on the medium that was 100% substituted by adzuki-bean paste refuse was inferior to the medium with 75% substitutive ratio and showed a remarkably low efficiency for preparing the substrate. These results suggest that adzuki-bean paste refuse is not suitable as a nutritional supplement but is useful as a substrate when mixed with sawdust of C. japonica in a sawdust based cultivation of P. ostreatus.