利用實生苗生產樹型聖誕紅之研究

樹型聖誕紅僅佔聖誕紅總產量的0.05%，因其樹型主幹的培養耗時，增加管理成本，同時也缺乏一套完善的樹型商品生產流程。聖誕紅實生植株具有節間長、莖直徑較粗、生長快且較強健等特性，同時實生聖誕紅不易分枝且主幹葉片容易落葉，在樹型苗生產過程能省去摘除主幹側芽和葉片的勞力花費。實生苗除葉摘心處理後能有8個節位萌發腋芽，強摘心及輕度摘心處理最多僅有5個腋芽萌發。除葉摘心處理植株可產生6枝超過5公分的側芽，同時側芽長度呈現由頂而下漸增的趨勢，使植株呈現一美觀樹型。利用高度20－25公分之實生苗進行至少3次除葉摘心，能生產盆花規格為高度45－50公分的樹型聖誕紅。

關鍵字

摘心；側芽；盆花；除葉；頂芽優勢

並列摘要

Poinsettia is an important pot flower in Taiwan market. For increasing the selling rate, its need to introduce new poinsettia cultivars, improve the quality of pot flower or increase the types of products. The yield of tree type poinsettia in all kind of products is only 0.05%. Because it spent much time for trunk development, therefore the costs of management increase. A better productive procedure for culturing tree type poinsettia has not been set up. Poinsettia seedlings have some advantages different than commercial cuttings. That includes long internodes, thick stem, growing faster, stronger, less branching and the leave usually dropping from trunk. These advantages decrease the cost of pinch and leave dropping. This study took these advantages cooperated with pinching technique to evaluate an applicable production for tree poinsettia. After LR-pinching, there are 8 axillary buds spreading from the trunk section. Hard or soft pinching only got 5 axillary buds spreading. LR-pinching could produce six more than 5 cm lateral shoots which length increasing top-down. Therefore present a beautiful tree shape. Using 20-25 cm seedlings and did at least three times LR-pinching could produce 45-50 cm poinsettia tree. It increases to 6 lateral shoots by used LR-pinching, furthermore it need at least 3 times pinching for tree poinsettia production from 20-25 cm seedlings. This method not only reduces the labor cost of basal shoots removal but also have the fineness laterals and crown architecture of tree poinsettia.

並列關鍵字

pinching ； axillary bud ； pot flower ； leaf removal ； apical dominance

國際替代計量

利用實生苗生產樹型聖誕紅之研究

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