Spawn running, pin head and fruit body formation, and mushroom yield of oyster mushroom (Pleurotus ostreatus) on waste paper
supplemented with peat, chicken manure and husk rice (90+ 10; 80 +20 w:w) were studied. The fastest spawn running (mycelia
development) (15.8 days), pin head formation (21.4 days) and fruit body formation (25.6 days), and the highest yield (350.2 gr) were
realized with the substrate composed of 20% rice husk in weight. In general, increasing the ratio of rice husk within the substrate
accelerated spawn running, pin head and fruit body formation, and resulted in increased mushroom yields, while more peat and
chicken manure had a negative effect on growing.