不同光照强度对郁金香生长与开花的影响

Influence of Different Light Intensities on Growth and Flowering of Tulips(Tulipa gesneriana)

为了探讨郁金香生长的最适光照环境,选取纯金、道琼斯、巴塞罗那等品种在不同遮阴下进行栽培试验,测定株高、叶片大小、叶绿素含量等指标。结果表明:纯金、道琼斯、巴塞罗那等郁金香品种在遮阴70%条件下,其株高明显增加,茎秆粗度及叶绿素含量降低明显,叶片变长而窄,植株出现徒长现象;而遮阴30%、50%处理的郁金香的株高、茎粗、叶片大小与对照相比差异较小,虽使始花期推迟,但花期明显延长。

To explore the optimum illumination environment for the growth of tulips （ Tulipa gesneriana L. ）, three tulip varie- ties, namely ＇ Strong Gold＇, ＇ Dow Jones＇ and ＇ Barcelona＇ , were selected, and the cultivation experiment was carried out under different shading treatments, the plant height, leaf size, chlorophyll content and other indexes were measured. The results showed that： under the condition of shading 70%, the plant height of three tulip varieties was increased obviously, stem diameter and leaf chlorophyll content were reduced obviously, leaf became longer and narrower, and their plants appeared vain growth phenomenon. Under the condition of shading 30% or 50%, the plant height, stem diameter and leaf size of tulips were not significantly different from those of the control, but their date of flowering-beginning was delayed, and flowering time was obviously orolonged.