セル育苗時の培地加温によるシンテッポウユリ品種の開花抑制(栽培管理・作型)  [in Japanese] Retarded Flowering of Lilium × formolongi hort. Cultivars by Bottom Heating at the Cell Seedling Stage(Crop Production & Cropping Type)  [in Japanese]

シンテッポウユリ(Lilium×formolongi hort.)8品種を,2003年5月12日の定植まで,15℃および25℃で培地加温してセル育苗した.25℃で育苗すると,6品種の開花が9月中旬まで遅れたが,ほとんどの品種でロゼット株の発生が多くみられた.唯一'F1オーガスタ'では,ロゼット株の発生が少なく,切り花品質もすぐれており,秋季生産に適した特性を示した.'F1オーガスタ'は,比較的少ない低温遭遇量で開花し,夏の高温の影響を受けてもロゼット化しにくい品種であると考えられる.

Eight commercial cultivars of Lilium×formolongi hort. were raised in cell trays that were bottom-heated at 15℃ or 25℃ until transplanted on May 12, 2003. Flowering of six cultivars raised at 25℃ showed retarded development by the middle of September, but many rosetted plants were found among most cultivars. Only 'F_1 Augusta' showed desirable characteristics for autumn production with a low rate of rosetted plants and high quality cut flowers. It is considered that 'F_1 Augusta' bolts after exposure to relatively limited chilling, and is less influenced by the high temperature in summer resulting in rosetting.