光質および照射時刻を考慮した育苗補光による野菜苗生産

概要

論文の詳細を見る
Intensive seedling production in nurseries progresses according to many factors including agricultural machinery developments, a farm workers aging, and a labor shortage etc. During seedling production in a greenhouse, the growth of plants is greatly influenced by the change in natural radiation according to the weather or the season. For this reason, in seedling production it is difficult for a greenhouse to secure the necessary optical radiation environment stably throughout the year. So, artificial supplemental lighting is desirable in a nursery producing seedlings. The basic experiments concerning vegetable (lettuce and broccoli) seedling production with supplemental lighting were performed in a greenhouse. In addition, other experiments during the rainy and early spring seasons when the sunshine levels were low were conducted using both commercial and trial lamps. As a result, for the efficient / stable production of vegetable seedlings, supplemental lighting is indispensable. In addition the following factors were significant. (1) Supplemental lighting before sunrise is desirable, and may produce a 20 ∼ 30% or more promotion effect if employed for 2 hours before sunrise. (2) To acquire effective supplemental lighting, the PPFD should be more than 60 μmol m-2s-1. (3) In addition to the 400 ∼ 700 nm PAR wavelength region, an addition of 700 ∼ 800 nm far red radiation would be effective.
生態工学会の論文
2005-01-31