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KMID : 0613820070170010082
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Journal of Life Science
2007 Volume.17 No. 1 p.82 ~ p.90
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Effects of Various Ventilation Systems on the Carbon Dioxide Concentration and Fruiting Body Formation of King Oyster Mushroom (Pleurotus eryngii) Grown in Culture Bottles
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Lee Hyun-Uk
Ahn Mi-Jeong
Lee Shin-Woo
Lee Cheol-Ho
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Abstract
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In an attempt to establish the appropriate ventilation device for the bottle culture of king oyster mushroom (Pleurotus eryngii), we investigated carbon dioxide concentration and fruiting body formation according to the various ventilation systems within the mushroom house. In addition to, the efficiency of air circulation and growth rate as well as the appearance of physiologically abnormal phenotypes during their growth stage were also evaluated. Four different ventilation devices, parallel-pressure type, positive-pressure type, negative-pressure type, and positive- and negative-pressure type were applied in this study. The positiveand negative-pressure type showed the highest efficiency of air circulation as CO₂ concentration was 800 ppm and the level of air current was relatively low compared to the other types (the CO₂ concentration of parallel-pressure type was 1,400 ppm). Moreover, the stipe length, the cap diameter, yield, and general quality grown in positive- and negative type ventilation device were also better than in the other three devices though it took slightly longer period for harvesting (18.4 days) than the others (17.6, 17.9 and 18.3 days). The appearance of physiologically abnormal phenotypes such as fruiting body lump, soft rot, and brown rot were significantly decreased in positive- and negative type compared to other types, while the appearance rates were not much different for other symptoms of bacterial ooze, stipe limb and stipe bumpy. In summary, we propose that the optimal ventilation system for the bottle culture of king oyster mushroom is positive- and negative type, and this device is expected to increase the total quality as well as yield all year around.
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KEYWORD
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king oyster mushroom(Pleurotus eryngii), ventilation, carbon dioxide concentration, fruiting body formation, bottle culture
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