Abstract
In order to obtain basic data for trace contaminant in closed cultivation facilities, trace gas generated in a closed type plant-mushroom cultivation chamber was identified and quantified. Lettuce plants and shiitake mushroom mycelium were cultivated in this chamber. Results were obtained as follows. Ethylene was released both from lettuce plant and from shiitake mushroom culture beds. The release rates were 1.1 μg plant-1 day-1 for lettuce plant and 2.8 μg bed-1 day-1 for shiitake mushroom culture bed. Dioctyl phthalate (DOP) and Dibutyl phthalate (DBP) were detected, and these concentrations reached to 0.21 ppb for DOP and 0.19 ppb for DBP seven days after closing. Organic solvents such as xylene and toluene and organic siloxane were detected with GCMS.
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