红毛五加繁殖特征及生境因子影响研究

Reproductive characteristics and habitat factors of Acanthopanax giraldii

该文通过种群生态学研究方法,系统调查与分析了红毛五加种群生长参数、克隆繁殖参数和有性繁殖参数,分析了上述参数间的相关性及与郁闭度、地形、土壤肥力因子间相关性,阐明红毛五加克隆分株能力、株丛果序生产能力及新枝生长能力间具有显著相关性,有性繁殖和克隆繁殖对于种群的延续均具有重要的作用,光照是决定红毛五加采用何种生长型的关键生态因子,郁闭度增加使种群由"集团型克隆生长"向"游击型克隆生长"变化,较高的林分郁闭度和低强度的草本层竞争是其种子萌发和定植的必要条件。该文认为在天然林保护和红毛五加资源持续开发的背景下,该物种的繁殖特征决定了其可采量将持续减少。

The growth parameters,clonal propagation parameters and sexual reproduction parameters of Acanthopanax giraldii population were systematically investigated and analyzed by means of population ecology in this study. The correlation among the above mentioned parameters and the correlation among canopy density,topography and soil fertility factors were analyzed. It is clear that there was a significant correlation among the clonal ramets,the fruit production capacity of the cluster and the new shoot production capacity of the A. giraldii. Sexual reproduction and clonal reproduction played an important role in the continuation of the population. Illumination was the key ecological factor that determined growth type. The increase in canopy density changed the population from " group clonal growth" to " guerrilla clonal growth",and the higher stand closure degree and low-strength herb layer competition was a necessary condition for seed germination and colonization. Under the background of natural forest protection and sustainable development of resources,the reproductive characteristics of wild A. giraldii resulted in the decrease of its recoverable quantity.