Volume 17 Part 1 Article 35: Effect of a Magnetic Field on Growth Indices of Oyster Mushroom (Pleurotus florida)

Volume 17 Part 1 Article 35
Year 2008
Title: Effect of a Magnetic Field on Growth Indices of Oyster Mushroom (Pleurotus florida)
Authors: J. Javanmardi, M. Ranjbar and G. Shams

Abstract:

Magnetic fields are one of the most important and complicated sources of energy that may affect natural processes. In order to investigate the effect of magnetic fields on the growth indices of oyster mushroom (Pleurotus florida), spawn was exposed to a magnetic field of intensity of 0, 3, 6, 9 or 12 mT for 3 hours, then planted by the conventional planting method in straw-base-filled polyethylene bags. After 30 days, fresh and dry weights, stem length, mushroom diameter, substrate final temperature, pH and CO2 were measured. Also determined were the number of days required for the first mushroom of 3 cm length to appear and shelf life. Results showed a positive and significant effect of the static magnetic field with an intensity of 12 mT on fresh weight, substrate final temperature, pH and CO2, stem length and mushroom diameter. However, the highest dry weight and shelf life were obtained from the 6 and 9 mT treatments, respectively.

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