摘要
斑叶兰开花前各构件的生物量在总生物量中所占比例具有明显差异，且在生境间具显著差异。在柳杉林中，茎构件所占比例显著高于其它构件的比例；其它生境中正常叶的比例显著高于同生境下其它构件的比例。花期，斑叶兰茎和叶构件所占比例最大，其中仅在灌丛中正常叶构件分配比例略大于其茎构件的，但二者差异不显著；生殖构件中，花瓣所占比例最大；除花托叶（p=0．002）外，其余生殖构件的分配比例在生境之间的差异均不显著；合蕊柱在各群落生境中的分配比例差异极小，几乎是恒定的。斑叶兰的生物量生殖分配表现出随分布群落演替阶段的提高而下降的趋势，即竹林〉人工柳杉林〉灌丛〉混交林；其生殖分配在20．35％～28．90％之间，而以干重计算则为21．09％～31．80％之间，明显高于其它一些多年生植物的（0％～20％），而表现出一年生植物的生殖分配特性。
There were obvious differentiations among the proportions of each module on biomass, significant differentiations among populations. Before flowering phase, the proportion of stems was significantly higher than that of other modules in the Cryptomeria fortunei H. forest population. But in other populations, the proportion of functional leaves was significantly higher. In the flowering phase, the proportion of stems was significantly higher than that of other modules. Besides, the proportion of functional leaves of the bush population had significantly higher. Among the reproductive modules, the petals occupied the highest proportion. Ex- cept flower stipules,the proportions of each module were insignificantly different among populations. Proportions of columns had hardly differentiations among populations. The reproductive allocation in G.schlechtendaliana Rchb. f. varied among community types. It was largest in pure forest of bamboo or planted C. fortunei H. ,intermediate in bush, and this smallest in evergreen and broad-leaved forest. The reproductive allocation in G. schlechtendaliana Rchb. f. was about 20%-30% ,which was obviously higher than the reproductive allocation in some other pernnial plants,and showed the reproductive allocation characteristics of annual plants.
出处
《广西植物》
CAS
CSCD
北大核心
2006年第1期28-31,共4页
Guihaia
基金
国家自然科学基金资助(30560025
30560089)~~
关键词
生殖分配
生物量
构件
演替群落
斑叶兰
reproductive allocation
biomass
module
serial community
Goodyera schlechtendaliana
