Comparative study on the mycelial growth and yield of Ganoderma lucidum (Curt.: Fr.) Karst. on different lignocellulosic wastes

Abstract

The aim of this study was to examine the possibility of using wheat straw (WS), cottonseed meal (CSM), sunflower meal (SFM), soybean straw (SBS) and bean straw (BS) as basal substrates in Ganoderma lucidum cultivation instead of oak (OS) and poplar (PS) sawdusts. In the study, effects of different growing substrates on spawn running period, yield and biological efficiency (BE) of G. lucidum were determined. Moreover, possible correlations among productivity and lignocellulosic content of substrates were assessed. Average spawn run period varied between 14.2 and 18.2 d. Total yields of G. lucidum grown on different substrates ranged from 28.6 g/kg to 86.1 g/kg, while the corresponding values for BE varied between 8.9%–24.7%. The highest yield and BE was exhibited by the OS followed by PS substrate. CSM gave the lowest yield and BE. Spawn running time was found to be positively correlated to nitrogen content of the substrates (r2 = 0.918) and negatively correlated to cellulose and hemicellulose content of substrate (r2 = −0.927 and r2 = −0.838, respectively). The total mushroom yield was correlated negatively to nitrogen content of the substrates (r2 = −0.850) and positively correlated to C:N ratio (r2=0.915). Moreover, there is a strong positive correlation between mushroom yield and cellulose and lignin content of the substrates (r2 = 0.794 and r2= 0.879). According to results, G. lucidum had a preference for substrates containing a high amount of cellulose and and lignin, and having a low amount of N and high cellulose:lignin ratio. Furthermore, SBS, WS and BS may be suggested as alternative basal substrates for cultivation of G. lucidum.