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Abstract: The oyster mushroom Pleurotus sajor-caju (Fr.) Singer was cultivated on three chemically as well as steam sterilized lignocellulosic substrates i.e. paddy straw (Oryza saliva), wheat straw (Triticum aestivum) and grass (Cyanodon dactylon). During cultivation carbon, cellulose, hemicellulose and lignin content of substrates decreased, while nitrogen and ash content showed continuous increase. Steam sterilized substrates suited better for biodégradation than the chemically sterilized ones. The progressive breakdown of cellulose, hemicellulose and lignin was correlated with apparent increase in the yield and bioefficiency of P. sajor-caju. Among three substrates paddy straw showed maximum biodégradation and it supported optimum yield followed by wheat straw and lastly the grass.
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