In the present study, king oyster mushroom was cultivated on seven substrates like paddy
straw, wheat straw, soybean straw, finger millet straw, groundnut shells, sorghum straw and
maize straw which have economic approach in agro industries as the residues are readily
available. Therefore, the aim of this study was to investigate the feasibility of using locally
available substrates for cultivation of king oyster mushroom. According to the results of this
investigation the maximum number of sporocarps (36.33), highest yield (870.67g per kg dry substrate), highest biological efficiency (87.07%) and maximum protein content (24.33%) was observed on treatment T 1 i.e paddy straw. In contrast the treatment T 5 supported the least number of sporocarps (12.33), lowest yield (249.33g per kg dry substrate), lowest biological efficiency (24.93%) and minimum protein content (17.67%).