@article{oai:mie-u.repo.nii.ac.jp:00010140, author = {向阪, 信一 and Kosaka, Shinichi and 洞口, 公俊 and Horaguchi, Kimitoshi and 齋藤, 直樹 and Saito, Naoki and 上條, 和彦 and Kamijo, Kazuhiko and 黒越, 治 and Kurogoshi, Osamu and 村上, 克介 and Murakami, Katsusuke}, issue = {11}, journal = {照明学会誌}, month = {Nov}, note = {application/pdf, For stable mass production of vegetable seedlings with good quality, a commercial greenhouse nursery needs a supplemental lighting system that is not affected by light fluctuations under natural solar conditions. Therefore, a practical plant nursery covering a 12 ×24 m area, and using a supplemental lighting system, was developed for the growth of vegetable seedlings. The developed lighting system had 400-W mercury-free, high pressure sodium lamps with reflectors, which produced a red radiation to far-red radiation photon flux(R/FR PF)ratio of 1.1. This is similar to that of solar radiation. And over about 60 µmol m⁻² s⁻¹ of PPFD was realized for stable and healthy gronth of vegetable seedlings. By using a simulation model of horizontal distribution of PPFD on two cultivation beds(each bed area: 4.6 × 22.6 m) under 100 lamps, it was found that the system had high uniformity of lighting on the two beds. Observed value of illulninance and PPFD and unifomity also satisfied the planned specifications. By repeating a seedling growth experiment using various plants in this greenhouse,it is expected that the practical and effective use of this supplemental lighting system will be possible in rainy seasons or in the late winter period.}, pages = {808--815}, title = {野菜苗育苗における人工光補光実証プラントの開発}, volume = {90}, year = {2006} }