不同生境下柔毛淫羊藿的开花物候

The flowering phenology of Epimedium pubescens Maxim in different habitats

用野外定点观测的方法对金城山和唐家河地区的柔毛淫羊藿的开花物候特征以及其与结实率进行了比较究,结果表明:在不同生境下的种群、个体、花序与单花的花期存在差异.种群的开花振幅曲线都呈单峰曲线,金城山柔毛淫羊藿的开花比例60%-70%,开花强度分布范围集中在50%;唐家河柔毛淫羊藿的开花比例40%-45%,开花强度分布范围则为20%-50%.个体水平的开花振幅曲线均呈单峰曲线,具有较高的开花同步指数,表现出一种集中开花的特性.坐果数与物候指数的相关分析表明两个地方的座果数均与开花数和花期存在着显著的相关性.综上所述,柔毛淫羊藿的个体开花物候容易受到地理环境的影响,因此,在环境干扰的选择压力下,为了吸引更多的传粉者来访而达到成功生殖的目的,它便形成了大量集中开花的模式.

This paper studied flowering phenological characteristics and the relevance between flowering phenology and seed rate of Epimedium pubescens Maxim in JinCheng Mountain and TangJiaHe by using field observations. The results showed that the flowering span of the population, individual, inflorescence and single flowering are different. the population showed a single peak concentration blossom style,The flowering ratio of Epimedium pubescens Maxim in JiuCheng Mountain is approximately 60% -70% ,the range of flowering intensity distribution focus on 50% ;The TangJiaHe＇s flowering ratio is approximately 40%- 45%, the range of flowering intensity distribution is 20% - 50%. the flowering amplitude curves of the individual level were of single peak and higher synchrony,exhibiting a “mass-flowering” pattern. The correlation analysis among the flowering phenology index and fruit number showed that there was correlation between fruit number and flowering date and correlation to flower number in these two places. In conclusion,the flowering phenology of Epimedium pubescens Maxim was affected by environment easily. so,it exhibits a “mass-flowering” pattern,which may be regarded as an adaptive strategy to ensure its reproductive success.