Effects of Light Irradiation Control on the Quality Preservation of Spinach during Postharvest Storage

概要

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We examined the effects of the light irradiation on the quality changes of green leafy vegetables after harvest, and clarified the quality preservation method of spinach by the light irradiation with the modified atmosphere effects by the film packaging. Spinach packaged in the sealed film was irradiated at the photosynthetic photon flux density (PPFD) of 4μmol/m2/s and 10μmol/m2/s as almost same intensity level as light compensation point by the white fluorescent lamp, white light emitting diode (LED) and the monochromatic LED's of wavelength at 470nm, 591m, 626nm and 660nm respectively. The concentration of CO2 in the sealed film was proved to decrease according to the light irradiation regardless of the different wavelength of light, and this showed that the effects of present modified atmosphere packaging is lost by light irradiation. The increase of weight loss by light irradiation was controlled by the film packaging, and then the commercial value was excellently maintained. Light irradiation after harvest contributed to keeping high L-ascorbic acid contents of the spinach. However the light irradiation of different wavelength was not found to influence the change of L-ascorbic acid contents.
農業施設学会の論文