广东莲花山白盆珠自然保护区苏铁蕨群落特征

Communities Characteristics with the Populations of Brainea insignis in Lianhuashan-Baipenzhu Nature Reserve,Guangdong

广东惠东白盆珠省级自然保护区地处粤东山区,苏铁蕨(Brainea insignis)是保护区内主要的国家级保护植物之一。应用样方调查法,分析该保护区内苏铁蕨种群所在群落的结构特点。在面积为1200 m2的样方中,共记录了维管植物89种,隶属于47科71属,以热带和亚热带分布型为优势;林冠层以鼠刺、大头茶和阿丁枫等为优势种。土壤有机质含量和氮素含量较为丰富,但磷素贫乏;在高郁闭度林冠下生长的苏铁蕨种群生活力较弱。基于研究结果,探讨了白盆珠自然保护区苏铁蕨种群发展的限制因素,提出了促进该区苏铁蕨资源可持续发展的保护建议。

Lianhuashan-Baipenzhu Provincial Nature Reserve lies in the east of Guangdong Province. Brainea insignis is one of the major national protected plants. The community characteristics with the populations of Brainea insignis were studied by plot method. A total of 89 vascular plants belonging to 47 families and 71 genera were recorded in the plot area of 1200 m^2. They are dominated by the tropical and subtropical distribution elements. The major canopy trees were ltea chinensis ,Polyspora axillaries and Altingia chinensis. The soil was high in soil organic matter and nitrogen, but low in phosphorus. The population viability in higher canopy density was weak. Based on the results, the major factors limiting the natural population development of Brainea insignis in Baipenzhu Nature Reserve were analyzed. The suggestion to facilitate the sustainable development of native populations of Brainea insignis is proposed.