Recent research from Iwate University suggests there may be some truth to old Japanese farming legends that claim lightning causes mushrooms to multiply.
In studies conducted over the past four years, Iwate University researchers — led by Associate Professor of Engineering, Koichi Takaki — have found that mushroom crop yields can be improved by applying high-voltage electricity to logs seeded with spores. So far, the team has studied ten mushroom species and found that bolts of lightning-strength electricity improve the crop yields for eight of those species.
Nameko and shiitake mushroom crops have demonstrated the most significant improvements after electrical stimulation. Under the best conditions, the nameko crop yield improved 80%, while the shiitake crop yield doubled.
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Lightning Makes Mushrooms Multiply