光度對文心蘭（Oncidium 'Gower Ramsey'）假球莖生長及開花品質之影響

Effect of Light Level on Pseudobulb Growth and Flowering Quality of Oncidium 'Gower Ramsey'.

張允瓊(Yung-Chiung Chang) ； 李哖(Nean Lee)

《宜蘭技術學報》 1期 (1998/12) Pp. 39-51

https://doi.org/10.6179/nit.1998.01.15

摘要

文心蘭Gower Ramsey在遮蔭25-95%的情況下，植株的營養生長狀況隨著光度的增加而提高。假球莖的長度隨著光度降低而增長，遮蔭25%時最低，約為85mm，遮蔭95%時最長，約為102mm。假球莖的寬度及厚度皆隨著光度的增加而增加，在遮蔭25%時，假球莖的最大寬度為33.3mm，厚度為24mm，遮蔭95%時，最大寬度及厚度則分別下降為26.1mm及16mm，即降低栽培光度，將使植株的同化產物之轉運（translocation）下降，影響假球莖的充實。生殖生長方面，亦有增加光度，開花品質隨之提高的趨勢。遮蔭55%時，每支花梗平均分支數最多約為4.2。平均花梗長度及小花朵數則在遮蔭25%-75%間差異不顯著。遮蔭95%時，植株無法抽出花梗，而直接萌發次代營養芽，在此光度下，自當代子球萌發出的孫球芽數為遮蔭55%時的2倍。已抽梗20cm左右的文心蘭花序發育的情形，仍是隨著光度的增強而提高，遮蔭25%時，花序品質最佳，平均花梗分支數為4.8，花梗長度約130cm。

關鍵字

光度 ； 假球莖 ； 潛伏芽 ； 花芽 ； 開花

並列摘要

Under shaded at 25-95%, the vegetative growth of Oncidium 'Gower Ramsey' increased with light intensity. The height of pseudobulb decreased with light intensity. The shortest height of pseudobulbs was 85mm, while shaded at 25%. And the longest one was 102mm, while shaded at 95%. The width and thickness of pseudobulbs were also increased with light intensity. The largest width and thickness of pseudobulbs were 33.3mm and 24mm when the plants were under 25% shaded. While the shorted of them were 26.1mm and 16mm when the plants were shaded at 95%. There are the same results in reproductive growth. The most branches of flower stalk were 4.2 when shaded at 55%. But the average flower stalk length and flowers' number were no significant differentiation under shaded at 25-75%. When shaded at 95%, the plants failed to flower. The new leads were emergenced from the base. The development of 20-30cm flower stalk increased with light level, too. The best inflorescence's quality were flower branches at 4.8 and stalk's length at 130cm when shaded at 25%.

並列關鍵字

light level ； pseudobulb ； latent bud ； flower bud ； flowering