Biological Efficiency evaluation of Pleurotus pulmonarius strains on fermented barley straw
DOI:
https://doi.org/10.33885/sf.2009.3.1054Keywords:
mushroom cultivation, solid State fermentation, intrastock crosses, oyster mushroomAbstract
Five Pleurotus pulmonarius strains obtained by interbreeding of monokaryotic
mycelia isolated from a commercial strain were studied. The aim was to identify germplasm
adequate to industrial production. Pasteurized barley straw was used as the substrate for
mushroom production. Two treatments were tested: barley straw fermented during 7 days
(PCF) and unfermented straw (PC). The mean biological efficiency of the strains was 55.73%
(PCP) and 71.25% (PC), while the production rate was 0.64% (PCF) and 0.92% (PC), after
four flushes, with a mean production period of 66 days (PCF) and 58 days (PC). During
fermentation period, the straw showed a maximum temperature (64°C) at five day. Prior to
sowing, the pH of PCF was 9.4 with 74% moisture and control (PC) had a pH of 8.5 and 73%
moisture. During the fermentation the initial C:N in the control was 76% (dry basis) and in the
PCF decreased gradually until 47% at seven day. Some of the strains generated increased
their productivity. However, their efficient use will depend on the substrate conditions on
which the strain grow.
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