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Comparison of growth rate of four Pleurotus fungi species on wheat straw and date palm leaf substrates

A. Kabirifard¹, A., Fazaeli²* H. and Kafilzadeh³ F.

¹Agricultural and Natural Resources Research Center, Bousher, Iran
²Animal Science Research Institute, P.O. Box 31585-1483, Karaj, Iran
³Department of Animal Science, Faculty of Agriculture, Razi University, Kermanshah, Iran

Malaysian J. Anim. Sci. 2012 15(1): 55-63

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In a 4?3 factorial completely randomized experiment, four Pleurotus species of cultures, namely P. florida, P. ostreatus A., P. ostreatus M. and P. ostreatus T., were cultured on wheat straw (WS), date palm leaves (DPL) and potato dextrose agar (PDA) substrates. Growth rate of the mycelium was measured for two weeks of incubation. At the end of second week, all plates were removed from the incubator and the biomass was dried and analyzed. During the first week of fermentation, growth rate of P. ostreatus A. and P. ostreatus M. were significantly higher (P<0.05) than P. florida and P. ostreatus T., whereas it was inverse during the second week of incubation. A significant interaction effect (P<0.05) was found between cultures with substrates. During the first week of incubation, the highest amount of mycelial growth rate was shown by P. ostreatus A. and P. ostreatus T. on PDA followed by P. florida. In addition, P. ostreatus A. and P. ostreatus T. had significantly higher growth rate (p<0.05) on DPL than WS. However, at the end of second week, the cumulative growth rate was not significantly different among the cultures or the substrates. Regarding the dry mater (DM) and organic mater (OM) losses, significant differences (P<0.05) were found between the substrates after two weeks of fermentation but no significant variation was shown among the cultures. However, there was a significant interaction effect (P<0.05) of cultures with substrates for DM and OM losses. Crude protein (CP) content was significantly different (p<0.05) among the cultures on the different substrates.