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To study the effects of an extremely low frequency magnetic field on mushroom spawn growth and yield.
Most species of Pleurotus are edible. Especially, the oyster mushroom (Pleurotus ostreatus) is widely cultivated. An increasing yield through magnetic fields could be economically interesting.
The mycelium was exposed at different magnetic flux densities (5, 15, 25 and 100 mT) and for different time periods (2, 5 and 15 minutes).
|チャンバの詳細||spawn was exposed in Petri dishes held between the poles of the electromagnet|
|ばく露装置の詳細||two pairs of cylindrical coils, each formed of 4,000 turns of 0.42 mm enamelled copper wire; each coil was wound 10 cm apart on an iron bar; two bars were placed one above the other|
|Sham exposure||A sham exposure was conducted.|
Exposure of the mycelium resulted in significantly increased numbers of pin heads and mature mushrooms as well as wet and dry masses in comparison to the control group. Especially, the combinations 5 mT for 15 minutes, 15 mT for 15 minutes, 25 mT for 15 minutes and 100 mT for 2 minutes showed superior effects. No significant difference was found in the duration until pin heads appeared between the exposure groups and the control group.
The authors conclude that exposure of mushroom mycelium to extremely low frequency magnetic fields could be used practically to obtain higher yields.