Utilization of industry-cultivated Flammulina velutipes spent compost as substrate for Pleurotus geesteranus cultivation

Pleurotus geesteranus mushroom has high sales turnover in recent years. Screening of high yield， low-cost media formulations has important significance for production. Flammulina velutipes spent compost is the waste after F. velutipes cultivation，it contains a lot of nutrients untapped. In this study，we used F. velutipes spent compost as substrate for P. geesteranus cultivation. The results showed that F. velutipes residue compost content increased P. geesteranus mycelial growth and primordia formation delayed. With the increase of F. velutipes spent compost content，P. geesteranus fruit body weight and biological efficiency decreased. when F. velutipes residue content was 40%，there was the highest net profit，it could be partially replaced cottonseed hull in P. geesteranus cultivation medium.