不同群落类型中柔毛淫羊藿无性系构件的形态特征及生物量配置比较  

Comparison of Morphological Characteristics and Biomass Allocation of Epimedium pubescens in Different Communities

作　　者：聂勇[1,2] 黎云祥[1,2] 权秋梅[2,3] 马永红[1] 王琼[1,2] 王荣[1,2] 

机构地区：[1]西华师范大学生命科学学院,四川南充637002 [2]西南野生动植物资源保护教育部重点实验室,四川南充637002 [3]四川农业大学农学院,四川雅安625014

出　　处：《中国野生植物资源》2009年第5期14-19,共6页Chinese Wild Plant Resources

基　　金：四川省杰出青年学科带头人培养计划项目(04ZQ026-047);四川省科技厅应用基础项目(03JY029-021-22);四川省重点学科项目(SZD0420)资助

摘　　要：在构件水平上,对生长在油樟(Cinnamomum longepaniculatum)群落、细叶青冈(Cyclobalanopsis glauca var.gracilis)群落、红桦(Betula albosinensis)群落中的柔毛淫羊藿的无性系构件特征及生物量配置进行比较,结果表明:(1)各群落中柔毛淫羊藿各龄级根茎数量均从高年龄级向低年龄级呈上升趋势,种群为增长型年龄结构;(2)细叶青冈群落中柔毛淫羊藿种群间隔子最长,各年龄级根茎上的地上枝数量、平均长度和叶面积均最大;(3)各群落中柔毛淫羊藿种群均将最高比例生物量分配给根茎,其次是叶片;(4)野生自然状态下,柔毛淫羊藿在相对光照低、土壤腐质层薄和土壤含水量低的生境中,种群地上构件生物量和单位面积总生物量均更高。研究表明柔毛淫羊藿种群在不同群落中发生了明显的可塑性变化。结合这些变化讨论柔毛淫羊藿种群的生态适应意义及其保护机制。The objective is to explore the morphological characteristics and biomass allocation of Epirnedium pubescens at modular level, three communities were sampled, i.e. , the Cinnctmomum longepaniculatum community （ I）, Cyclobalanopsis glauca vat. gracilis community （II） and Betula albosinensis community （III）. The results indicated that the number of rhizomes rose from high age - classes to low age -classes in all communities. The age structure of three populations fell into expanding type. In C. glauca var. gracilis community, the length of spacer, the number and average length of branches on the rhizome at each age, and the leaf area were highest. All populations of E. pubescens in different communities allocated the highest proportion of biomass to rhizomes, next to leaves. Plants of E. pubescens growing in environment characterized with relatively lower hght intensity, thinner thickness of soil humus, lower soil moisture had more aboveground biomass and total biomass in unit area. In summary, this study showed that E. pubescens exhibited a high degree of morphological plasticity in response to different community types. Based on these plasticity changes, the authors probed the ecological significance of morphological plasticity and the protection measures of E. pubescens.

关 键 词：柔毛淫羊藿 构件 形态特征 生物量分配 

分 类 号：Q948.12[生物学—植物学]