高黎贡山自然保护区西域青荚叶的植物群落学特征

西域青荚叶是亟待开发的一种珍稀野生花卉种质资源。通过对高黎贡山自然保护区西域青荚叶植物群落多项特征所作的样地调查,在该保护区西域青荚叶的分布地带共收集到维管束植物57科96属128种。对其生境植物群落区系植物成分的分析表明,该植物区系成分较为复杂,其作为东亚古老植物区系的一部分,与古热带、泛北极植物区系有密切关系,而与古地中海植物区的联系较为缺乏,热带和温带区系交错十分明显,属于从热带向温带过渡的亚热带性质;其群落成分分析表明,植物组成种类十分丰富,类型多样;生活型谱显示该群落以高位芽植物为主,地面芽植物次之。高黎贡山自然保护区所分布的西域青荚叶种群,生活于该保护区的针阔混交林或中山常绿阔叶林以及竹林中水湿条件较好的地段,生活力强,以分蘖繁殖为主。其生存环境属于从热带向温带过渡的亚热带性质。温暖湿润的气候,中或弱的光照;高或中的土壤湿度、微酸性或酸性的土壤,高或中等的土壤肥力是适合该种植物生存的生境。

Characteristics of Helwingia himalaica Community in Gaoligongshan National Nature Reserve

Helwingia himalaica is a rare wild flower which needs development urgently/ According to the community characteristics,survey on Helwingia himalaica in Gaoligongshan National Nature Reserve was conducted.One hundred and twenty eight species of vascular plants belonging to 57 families and 96 genera were collected from the distribution area of Helwingia himalaica.The floristic characteristics of its habitat were analyzed.The results showed that floristic components was very complex,as a part of ancient east Asia flora,the flora of distribution area of Helwingia himalaica in Gaoligongshan National Nature Reserve was closely related to palaeotropis and holarctis,and was short of relationship with ancient Mediterranean.The characteristics of interlace of tropical and temperate flora was very distinct,and had the feature of transition from tropical flora to temperate flora.The results of community composition analysis showed that the plant composition was very rich,the plant types were very diversified.The life-form spectrum analysis implied that phanerophyte was the dominant plant,next came hemicryptophyte.Helwingia himalaica population distributed in mixed coniferous broad-leaved forest,mid-montane humid evergreen broad-leaved forest or site with good water condition in bamboo forest.The viability of this species is strong,and tiller is the major way for reproduction.The habitat of this species is characterized by subtropical feature,warm and moist climate,middle or slight sunlight,high or middle soil humidity,slight acid or acid soil,high or middle soil fertility,were suitable for the growth of this species.