| 摘要 |
PURPOSE:To enable smooth transfer of pollen by a bee in a farm house having hindered transmission of near ultraviolet rays. CONSTITUTION:This house for agricultural use is produced by stretching a film having a spectral transmittance at 340nm wavelength corresponding to 70% of the spectral transmittance at 550nm wavelength and a total light transmittance of >=70% as a roof material and is provided with a means for irradiation the crops in the house with light containing near ultraviolet rays having wavelength of 310-380nm. |
