关键词：
土庄绣线菊;三裂绣线菊;森林光环境;形态;生物量;生物量分配
摘 要：
[目的]森林光环境是影响林下灌木植物正常生长和良好更新的重要因素之一。为了探求土庄绣线菊和三裂绣线菊一年生幼苗对不同森林光环境的适应特点和二者的区别,本研究选择林下和林外两种森林光环境。[方法]通过测定土庄绣线菊和三裂绣线菊一年生幼苗植株的高、地径、地径比、叶鲜重、比叶面积、叶面积比、生物量和生物量分配,从而得到两种绣线菊一年生幼苗在形态特征上的不同光适应性,为两种绣线菊的造林使用、更新和维护提供依据。[结果]结果表明:不同森林光环境下两种绣线菊的根、茎、叶生物量及总生物量表现出相同的规律。两种绣线菊在林内环境中均显著提高了地上生物量的比例。林外环境土庄绣线菊根生物量比显著高于林内植株,在叶生物量比指标上则相反。从株高、地径、高径比来看,林内遮荫环境明显降低了土庄绣线菊和三裂绣线菊的地径,同时显著提高了土庄绣线菊的高径比。从叶面积特点来看,两种绣线菊叶生物量林外和林下差异显著,而且比叶面积对光响应一致,林下环境使比叶面积明显增大。林下环境土庄绣线菊存活率略高于三裂绣线菊,林外环境三裂绣线菊存活率明显高于土庄绣线菊。说明二者并不是传统的喜光植物,三裂绣线菊对不同森林光环境有着很强的适应能力,土庄绣线菊具有较强的耐阴性。[结论]所以在以后的造林的计划中可以在林下多配置土庄绣线菊,在林外种植三裂绣线菊,以达到造林复层的目标,提高植被对水土保持的作用。
译 名：
Morphological characteristics of the Spiraea pubescens and Spiraea trilobata seedlings growing under two forest light environments in GuanCen Mountains
作 者：
Ren Da;Wang Jun;Guo Jinping;Zhang Yunxiang;College of Forestry Shanxi Agricultural University;College of Urban and Rural Construction,Shanxi Agricultural University;
关键词：
Spiraea pubescens;;Spiraea triblobata;;Forest light environmental;;Morphological response;;Biomass;;Biomass allocation
摘 要：
[Objective]Forest light environment is an important factor affecting forest tree growth and complete the normal renewal process.In order to explore the illumination change influence on Spiraea pubescens and Spiraea trilobata seedlings,we selected two kinds of forest light environments,open and understory.[Methods]Determination of Spiraea pubescens and Spiraea trilobata seedlings height,diameter ratio,specific leaf area,leaf area ratio,biomass and biomass allocation,light adaptability of Spiraea pubescens and Spiraea trilobataseedlings in the physiological and ecological characteristics,for spiraea's forest renewal,maintenance and provide the basis for recovery.[Results]The results show that:The root,stem,leaf biomass and total biomass of the two kinds of spiraeain in different forest light environment showed the same rule.Two species of spiraea in forest environment significantly increased the proportion of above ground biomass.When pubescens seeds in open area,their root biomass is significantly increase in leaf biomass ratio index instead.From the plant height,ground diameter,the ratio of height to diameter,canopy shade environment obviously and the Siraea pubescens and Spiraea trilobata size decrease,and significantly improve the Spiraea pubescens ratio of height to diameter.From the characteristics of two kinds of leaf area,leaf biomass of spiraea forest was significant.The response of the leaf area was the same to two kinds of spiraea in understory,and their leaf area weresignificantly increased.In the shading environment,the survival rate of the Spiraea pubescens is slightly higher than the survival rate of Spiraea trilobata.The survival rate of Spiraea trilobata was significantly higher than Spiraea pubescens in shading environment.The two kinds spiraea are not traditional hi light plants,spiraea trilobata in different forest light environment has a strong ability to adapt,Spiraea pubescens with strong shade tolerance.[Conclusion]In the future afforestation plan,pubescens seedlings could plant under high trees,in the open environment,we could plant more Spiraea trilobata seedlings,so we can achieve the goal of afforestation,and enhancing the effect of vegetation on soil and water conservation.
