Browsing by Author "Sopit Vetayasuporn"

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    The Feasibility of Using Coconut Residue as a Substrate for Oyster Mushroom Cultivation
    (Ansinet, 2007) Sopit Vetayasuporn
    The effects of two different substrates, sawdust and coconut residue and mixture ratios on oyster mushroom cultivation were determined. The mycelium growth was unable to completely colonized the coconut residue substrates. Percentage of mycelium colonized on the substrate was reduced when percentage of coconut residue supplemented in cultivation substrate was increased. Even the mycelium growth was not totally colonized the coconut residue substrates but the mass of whitish mycelium was thick, dense and comparatively compact when compared to sawdust (control). A substrate combination of 25% coconut residue + 75% sawdust accelerated the mushroom growing processes and gave the highest in both mushroom yield (559.67 g) and percentage Biological efficiency (BE; 109.80%). Even the substrate combination of 25% coconut residue + 75% sawdust gave the maximum mushroom yield but this yield was insignificantly different to those found from 100% sawdust (536.85 g). Least yield (278.78 g) and low BE (56.76%) were revealed from coconut residue alone and these values were significantly different to those found in all cultivation substrates at a confidence level of 95%. For oyster mushroom (Pleurotus ostreatus) cultivation, it is clearly indicated that the by-product waste such as coconut residue can be used as a supplementation material with sawdust and the appropriate ratio added should not be exceeded 25%.
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    Liginocellulosic Materials as a Possible Substrate for Pleurotus Ostreatus (fr.) Kummer Cultivation
    (Ansinet, 2007) Sopit Vetayasuporn
    Four lignocellulosic substrates (sawdust, peat of coconut husk, narrow leaf cattails and bagasse) were used for Pleurotus ostreatus cultivation and 3-6 flushes were obtained from these substrates. A bagasse substrate accelerated the mushroom growing processes. The mycelial completed colonization, primordium initiation and fruiting body formation were found within 28, 40 and 44 days, respectively. The sawdust (control) gave the maximum mushroom yield (536.85 g per 1 kg substrate) and this yield was significantly different to those found from bagasse (360.84 g), peat of coconut husk (278.78 g) and narrow leaf cattails (112.10 g) at a confidence level of 95%. Even the mushroom yield obtained from bagasse was lower than sawdust but in term of biological efficiency (BE) value the result achieved from bagasse (103.56%) was slightly higher than sawdust (95.02%). Low BE values were revealed in both peat of coconut husk (56.76%) and narrow leaf cattails (44.67%) and these values were significantly different and two times less than those found in bagasse and sawdust. Therefore, when BE value was taking into account the lignocellulosic substrate likes bagasse has shown great potential for use as a raw material instead of sawdust since this substrate provides an economically acceptable production alternative for P. ostreatus cultivation.