缙云山2种禾草种群生殖配置的比较研究  

Comparison study on reproductive allocation of two grass (Gramineae) populations in Jinyun Mt.

作　　者：宋会兴[1] 彭远英[1] 

机构地区：[1]曲阜师范大学生命科学学院,山东曲阜273165

出　　处：《植物资源与环境学报》2005年第3期12-15,共4页Journal of Plant Resources and Environment

基　　金：国家自然科学基金(39770134);曲阜师范大学青年基金(02013)资助项目

摘　　要：利用样方法对生长于重庆缙云山不同生境条件下的2种禾草———白茅〔Imperatacylindrica(L.)Beauv.〕和淡竹叶(LophatherumgracileBrongn.)的生物量配置格局进行了研究。结果表明,白茅种群在整个生长期内各构件生物量配置格局变化不大,其中对根状茎的配置比例最高,达到70.18%,有性生殖的生物量分配比例为4.51%,没有秆构件;淡竹叶种群在生长季内生物量配置格局发生较大变化,营养生长期、花期和黄熟期根构件的生物量分别占总生物量的77.33%、36.39%和48.66%,叶构件则为19.35%、45.42%和27.17%,有性生殖的生物量分配比例为11.11%。与白茅相比,淡竹叶种群秆构件明显。二者在生物量配置格局上存在显著差异,反映了二者对各自生活环境的适应特征。The biomass allocation patterns of two grasses [ Imperata cylindrica （L.） Beauv. and Lophatherum gracile Brongn. ~ in Jinyun Mountain of Chongqing City were studied using the quadrat method. The results showed that the biomass allocation pattern of I. cylindrica population changed little in the whole growth stage and 70.18% of biomass was allocated to root. The biomass allocation pattern of L. gracile population changed greatly in different growth stages, the biomass allocated to root at vegetative growth stage, flowering stage and yellow-ripe stage were 77.33% ,36.39% and 48.66% respectively,while the biomass allocated to leaf were 19.35% ,45.42% and 27.17% respectively. The reproductive allocations of the two species populations were 4.51% and 11.11% respectively, which were lower than that of annual grasses. The significative differences of biomass allocation patterns of I. cylindrica population and L. gracile population reflected the fitness to their habitats.

关 键 词：缙云山 生殖配置 白茅 淡竹叶 

分 类 号：Q948[生物学—植物学]