[The acting spectra simulating and planting of high yield radish].
The acting spectra for the photosynthesis of radish were investigated by the reflection spectra of radish leaves. It was found that the reflection spectrum of radish leaves and the acting spectrum required for photosynthesis were similar to a reflection peak at 550 nm and two absorption bands around wavelengths of 440 and 680 nm. The fluorescent auxiliary and colorant were dispersed in macromolecule resin to make the photo-ecology agricultural film, hence simulating the acting spectra of crops. The fluorescence spectrum of photo-ecology film showed two emission bands at the wavelengths of 616 and 660 nm which overlap the band of 680 nm in the acting spectrum. In the excitation spectra of the film, a peak was found at the wavelength of 550 nm, the same as the reflection band of radish leaves. As a result of this, the solar radiation in the wavelength range of red could be enriched by using the photo-ecology film. It was shown that the yield of radish, planted in the greenhouse of the photo-ecology film, had increased by 20.2%.
Meng
Ji-wu
JW
Department of Physics, Ocean University of Qingdao, Qingdao 266003, China.
Zheng
Rong-er
RE
D004463:Ecology; D005453:Fluorescence; D008027:Light; D010777:Photochemistry; D010788:Photosynthesis; D018515:Plant Leaves; D031224:Raphanus / Q000254:growth & development*; D013050:Spectrometry, Fluorescence / Q000379:methods