遮光对石蒜叶片生长及开花期性状的影响

石蒜（Lycoris radiata）是重要的秋冬季观赏及药用植物，市场需求量大，但其人工培育技术却严重滞后。本研究分析了全光照和遮光 45%、75%、90%处理对石蒜叶片生长（叶数、叶长、叶宽）及开花特性（花期、花枝数、花序小花数）的影响。结果表明，遮光程度越大，石蒜叶片越长、越宽；但叶片数越少，开花越晚（始花期、盛花期），且花期也相应缩短。在4种处理中，叶片数以全光照处理最多，叶长和叶宽均以遮光90%处理下最大；花枝数、单花期及开花整齐度均以遮光45%处理下最佳，其次为75%处理；而平均每序小花数则以遮光75%处理下最多，其次为45%。综合考虑，石蒜切花生产适宜的光环境为遮光45%。

Effects of different shading on leaf growth and flowering characters of Lycoris radiata

As an importantly medicinal and ornamental plant growing in autumn and winter, Lycoris radiata has a big market; however, its cultivation technology is backward. An experiment was conducted to determine the effects of different shading on leaf growth (leaf number, leaf length, leaf width) and flowering characters (flowering time, flower counts, inflorescence floret number) of L. radiata. The results of this study showed that the increasing shading increased the leaf length and width, decreased the leaf number, postponed the first flower and full bloom, and shorted the flowering period of L. radiate. The maximum number of leaves was found in the control (no shading), and the largest leaf length and leaf width was found in the treatment with 90% shading. The biggest flower count, longest single flowering time, flowering uniformity and average flower number per truss were observed in the treatment with 45% shading. This study suggested that the optimal shading was 45% for production of L. radiata.