ABSTRACT Dendrobium is a kind of popular orchid with long display life of flowers. Since it has a long vegetative period to flowering, it is necessary to develop methods to promote flowering. The effects of thidiazuron (TDZ) on flowering and the morphological characteristics of the Dendrobium ‘Sunya Sunshine’ were investigated. One-year-old and uniform height potted plants were used. Plants were spayed and root irrigated with the same amount of TDZ solution in different concentration treatments. The results showed that TDZ promoted the emergence of new shoots, but it did not affect plant morphology, such as the stem height, stem diameter, leaf size. TDZ application of 30 mg·L−1 increased the floral bud formation rate to 87.1%, increased inflorescence number and stalk thickness, but it also decreased the flower number per inflorescence and flower size, and shortened the flowering duration. This study indicated that TDZ could promote flowering, and the optimum concentration of the TDZ solution was 30 mg·L−1.

中文翻译：

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噻唑脲对铁皮石斛盆栽植物形态和开花特性的影响

摘要 石斛兰是一种受欢迎的兰花，花期长。由于它的营养期到开花期很长，因此有必要开发促进开花的方法。研究了噻唑脲（TDZ）对石斛'Sunya Sunshine'开花和形态特征的影响。使用了一年生且高度一致的盆栽植物。用相同量的不同浓度处理的TDZ溶液对植物进行喷洒和根部灌溉。结果表明，TDZ促进了新芽的出现，但不影响植株的茎高、茎粗、叶片大小等形态。TDZ施用30 mg·L−1使花芽形成率提高到87.1%，增加花序数和茎粗，但它也减少了每花序的花数和花的大小，缩短了开花持续时间。本研究表明，TDZ具有促进开花的作用，TDZ溶液的最佳浓度为30 mg·L-1。