柔毛淫羊藿生物量与生殖配置研究

Research on biomass and reproductive allocation of Epimedium pubescens Maxim

关键词:  不同生境  柔毛淫羊藿  生物量  生殖配置

Key words:  different altitudes  Epimedium pubescens  biomass  reproductive allocation

摘要:

探索了柔毛淫羊藿在有性繁殖时期不同生境和不同发育阶段的生殖配置,以探讨柔毛淫羊藿的生物量及生殖配置的内在规律。结果如下:随着生长季节的变化,柔毛淫羊藿总生物量呈现出低-高-低的趋势,柔毛淫羊藿生物量积累最快的时间为柔毛淫羊藿花期和果期。其中地上部分生物量在不断增加,地下部分生物量变化较小,从而根冠比在有性繁殖时期逐渐下降。样地一和样地二的生物量变化较小由于环境原因,样地三的生物量变化显得很明显。从资源生殖分配策略上分析,在有性繁殖时期,根、茎、叶生物量相对较大,而花、果生物量分别在有性生殖生长中期和末期达到最大值。花蕾、花、果实生物量三者呈负相关。

Abstract:

To study the biomass of Epimedium pubescens Maxim and the inherent laws of reproductive allocation,this experiment explored the sexual reproduction of E.Pubescens Maxim in altitude and different developmental stages of reproductive allocation. Along with the change of the growing season,the accumulation tendency of total biomass of whole population was low before flowering but fast during flowering then declined gradually after flowering. The peak rate of biomass accumulation was at the floweral and the fruital periods the accumulation of aboveground increase continuously,but the accumalation of underground part varies slightly. So the ratio of underground part and overground part decreases gradually in the sexual reproductional period. The biomass of populations at middle and low altitudes changed little but obviously at high altitude among three developmental stages because of special environmental factors by analyzing the changes of the biomass from the perspective of assignment strategy of recourses,it's found that at the sexual reproductive period,the biomass accumulationes of roots,stems and leaves were higher than others,and that of flowers and fruits reached the highest at the middle and the last stages of the sexual reproductive period. The biomass of buds,flowers and fruits were negatively correlated.