本試驗利用台灣冬季日長 ( 短日照低於 8~9 hr) 及半 夜連續電照 4 hr ( 半夜 10 時至翌日 2 時 ) 方式種植唐菖蒲 ， 探討 30 個唐菖蒲品種 ， 評估並篩選適合電照栽植之品種 ，以促進植株生育與提高切花品質，使生產業者獲得更大利潤，茲將結果簡述如下： 長日與短日處理對唐菖蒲生育情形有顯著之影響，長日狀況下其花莖長度、花蕾數與切花之開花率、鮮重及瓶插壽命等各項均較短日處理者有極顯著促進效果。惟抽穗期與採收期會延遲而較慢收穫 7~12 日。但此等結果亦因品種而異，所以需慎選品種。選拔優良之切花品種，已篩選適合電照之品種，如 'Hunting Song' 、 'Wig ， s Sensation' 、 'Fidelio' 、 'Mascagni' 、 'Advance Red' 、 'Invitatie' 等，可供農民栽培時參考，符合經濟效益。

關鍵字： 唐菖蒲、品種收集、光週期。

　　I n order to enhance the plant growth and promote the quality of cut flower in gladiolus production, the scre ening and evaluation of suitable varieties for lighting treatment is carried out. 30 gladiolus varieties were planted under winter natural daylength (daylength less than 8-9 hours) and 4 hours lighting treatment at midnight (from 10 pm to 2 am). The result indicated that the long-day and short-day treatments have significant effect on gladiolus growth. Under long-day condition, the length of flower stem, flower bud number, opening rate of cut-flower, fresh weight and vase life have significantly enhancing response than that of short-day treatment. However, flower emergence day and harvesting day are delayed by 7-12 days. The result is different in different varieties. The suitable varieties such as: Hunting Song, Wig's Sensation, Fidelio, Massagi, Advance Red, Invitatie etc. have been selected for lighting treatment.

Key words: gladiolus, variety, photoperiod.