Comparison of Ultrasonic And Acoustic Sound Treatments on Grey Oyster Mushroom (Pleurotus Sajor-caju) Cultivated on Sawdust And Kenaf Waste

Abstract

Sound stimulation and substrate are among the main factors that enhance the formation of fruiting bodies in order to increase the productivity of grey oyster mushroom. The main purpose of this study is to investigate the effects of ultrasonic and acoustics sound treatments on grey oyster mushroom (Pleurotus Sajor-caju) cultivated on rubber tree sawdust and kenaf waste. The growth performance, yield and post-harvest quality of grey oyster mushroom were determined. Mushroom bags were treated with ultrasonic and acoustic sound every 5 days intervals during mycelia growth. Sound treated mushroom bags had faster growth rate and treatment with acoustic sound appeared to be a better treatment among all the treatments. In terms of yield, sawdust obtained a relatively higher amount of total weight of fruiting bodies, greater biological efficiency and bigger number of fruiting bodies than kenaf waste. Acoustic sound contributed to a higher in yield but has the highest substrate utilization among all treatments. Sawdust shows no significant different (p>0.05) in physical characteristics such as pileus diameter compared to kenaf waste but both of them showed significant different (p<0.05) among different treatments. Acoustic sound had firmer and showed relatively darker compared to other treatments. Substrate of sawdust had a relatively higher of moisture content of pileus and stem than kenaf waste. Among all the treatments used, mushroom bag treated with acoustic and cultivated on sawdust was the best treatment due to is relatively faster growth performance and higher yield.