宁夏青铜峡半日花群落区系组成与群落结构特征

Study on the floristic genera and structure of the community of Helianthemum songaricum in Qingtongxia city, Ningxia

以宁夏青铜峡半日花(Helianthemum songaricum)群落为研究对象,在沙地和砾石质两种生境设置了代表性样地,采用典型样方法调查了半日花群落分布、种子植物区系和群落结构。结果表明:①半日花群落分布于宁夏青铜峡市井石子梁;群落类型主要以半日花-刺旋花群系为主。②基于样地数据,半日花群落有种子植物47种,隶属于17科39属;其中灌木、半灌木占36%,多年生草本占43%,一年生草本植物占21%;区系成分以温带分布类型为主。③两种生境多样性比较研究显示:沙地生境多样性比较高,有利于半日花群落的稳定。本研究结果可以为宁夏珍稀濒危植物半日花的保护提供基础数据。

In this paper, the Helianthemum songaricum community in Ningxia was used as the research object. Representative plots were set up in sandy and gravel habitats. We studied the distributions, the flora of seed plants, and the community structure of H. songaricum. The results showed that:(1) The community of H. songaricum was distributed in Jingshiziliang,Qingtongxia City, Ningxia. The community was dominated by Ass. H. soongoricum+Convolvulus tragacanthoides.(2) Based on plot data, there are 47 species of seed plants in Helianthemum songaricum community, belonging to 17 genera and 39 genera, including shrubs and semi-shrubs account for 36%, perennial herbs account for 43%, and annual herbs account for21%. The distribution types are mainly temperate distribution.(3) Sandy habitats are conducive to the stability of H.songaricum communities. Our results can provide basic data for the conservation of rare and endangered plants in Ningxia.