红花檵木Loropetalum chinense var.rubrum植物功能性状对光照强度的响应

Responses to Loropetalum chinense var.rubrum Functional Traits to Different Light Intensities

通过研究不同光照条件下红花檵木功能性状的变化规律以及各功能性状间的相关关系,分析红花檵木植物功能性状对不同光照条件的响应及其对光照条件的适应性,以期为红花檵木在园林绿化工程中的科学配置提供理论依据。结果表明光照与红花檵木叶面积、比叶面积和茎比密度呈负相关,与叶干物质含量、叶片厚度、当年生枝条长度、枝干物质含量呈正相关,不同光照条件条件下比叶面积、叶厚度、叶干物质含量、当年生枝长等指标差异显著。光照条件对红花檵木各功能性状间的相关关系有影响,从全日照到半阴的光照条件,红花檵木功能性状间的相关关系增强。在半阴的光照条件下,具有大叶片的植株,叶片较薄,当年生枝条较长,干物质含量较低。

By study on the variation of leaf characters and stem characters of Loropetalurn chinense var. rubrum under different light intensities, the relationship between plant functional traits and light in- tensities and adaptation of the plant functional traits to habitats were analyzed. The results showed that light intensities was negatively correlated with leaf area, specific leaf area and stem density, but positively correlated with leaf dry matter content, leaf thickness, length of current year twigs and twig dry mater content were different significantly. Light intensity affected the functional traits, correlation increased with the change from full-day light to half-day light.