改進玫瑰冬季切花產量之研究 I .遮陰與夏季摘蕾對冬季切花產量之影響

Improvement of Cultural Practice for Winter Rose Production I. Effects of Shading and Summer Pinching on the Yield of Winter Roses

本試驗以二年生玫瑰品種，Christian Dior, Red Success, Landora,及Samantha為材料，比較遮蔭與夏季摘蕾對冬季切花產量之影響。試驗結果發現，遮蔭對各品種的影響反應不同，可提高Samantha及Landora的冬季切花產量，但會導致Christian Dior及Red Success減產。夏季摘蕾即可有效的提高各供試品種的冬季切花產量。利用白色尼龍網遮蔭栽培，配合夏季摘蕾可獲得最高的冬季切花產量，與露天栽培夏季切花處理比較，Christian Dior增產17.5%；Red Success增產15.9%；Landora及Samantha到各增產61.7%及73.5%。露天栽培配合夏季摘蕾在上述各品種冬季切花產量則依序增加20.8%、8%、11.2%及66.2%。

The effects of shading and summer pinching (1, June-19, Aug. on winter flower production (Oct.-Mar.) in two-year-old of Christian Dior, Red Success, Landora and Samantha plants were evaluated. The effect of shading on the yield of winter flower varied with cultivars; it decreased the flowers number of Red 'Success and' 'Christian' Dior, but increased those of Landora and 'Samantha' flower production. Summer pinching increased winter flower production of all tested cultivars. Under shading culture, summer pinching had the best result. It increased 'Christian' Dior, 'Red Success,' 'Landora' and 'Samanthan' winter flower production by 17.5%, 15.9% 61.7% and 73.5% respectively, in comparison with outdoor culture with summer harvest. Sacrificing summer yield in outdoor culture increased the number of winter flowers production of four cultivars by 20.8%, 8%, 11.2% and 66.2% respectively.