2种不同生境中毛瓣金花茶的种群结构  

Population Structure of Camellia pubipetala in Two Different Habitats

作　　者：戴月[1,2] 薛跃规[2] 

机构地区：[1]湖北第二师范学院化生院,湖北武汉430205 [2]广西师范大学生命科学学院,广西桂林541004

出　　处：《安徽农业科学》2011年第25期15603-15607,共5页Journal of Anhui Agricultural Sciences

基　　金：广西自然科学基金(0542033);广西环境工程与保护评价重点实验室研究基金(0802k013);湖北第二师范学院创新团队建设计划

摘　　要：[目的]探索濒危植物毛瓣金花茶(Camellia pubipetala)在2种不同生境中的种群结构和动态。[方法]采用样地调查和统计分析方法,对广西省大新县福隆乡和隆安县龙虎山2个典型分布区的毛瓣金花茶生境特征、种群结构及其开花情况等进行比较研究。[结果]福隆乡毛瓣金花茶所在的苹婆群落结构较简单、郁闭度低,人为干扰较频,种群的营养生长受限,种群结构简单、年龄偏小;但其生殖生长良好,开花年龄早,灌木层植株的开花率和开花量高于龙虎山种群。龙虎山的毛瓣金花茶所在的苹婆+米浓液群落结构和层次较复杂,郁闭度高,种群营养生长旺盛,结构更加复杂和稳定,树龄偏大;然而其生殖生长受限,开花年龄晚,灌木层植株开花率低、开花量小。但伸入乔木层的植株开花率又会升高,开花量增加。2个种群皆能适应各自的生境,种群结构完整并较稳定,在灌木层中处于优势地位。由于立地条件、人为干扰等因素的影响,2个种群的新生幼苗都极稀少,种群更新能力微弱。[结论]必须因地制宜采取各种合理的综合措施对两地毛瓣金花茶进行保护,以促进其种群的可持续发展。[Objective] The purpose of the research was to explore the population structure and dynamics of an endangered species Camellia pubipetala in two different habitats.[Methods] By field investigation and ecological statistical analysis,the habitat characteristics,population structure and blooming case of Camellia pubipetala were studied and compared at two typical distribution areas-Fulong Town and Longhushan Nature Reserve of Guangxi Province.[Results] The Sterculia nobilis communities,where Fulong Camellia pubipetala population was located,were simply in structure,low in canopy density and frequent in disturbance,thus the vegetative growth of Camellia pubipetala population here has been restrained,the population was younger and its structure was simple.Nevertheless,with good reproductive growth and early blossoming age,the plants in shrub layer had a much higher blossoming rate and amount than Longhushan population.The Sterculia nobilis ＋ Teonongia tonkinensis communities,where Longhushan Camellia pubipetala population was located,had a complicated structure and higher canopy density.The vegetative growth of this population was luxuriant,with more complicated and stable structure and higher age.However,the reproductive growth of the population was restrained and its blossoming age was later.The blossoming rate and amount of the plant in shrub layer was lower,but they would be increased when the plant grew into tree layer.With integrated and steady structure,both of the two populations could adapt to their habitats and dominate in shrub layer.Due to site condition,disturbance and other factors,young seedling individuals of the two populations were rare,and their self-renewing abilities were feeble.[Conclusion] Reasonable and integrated measures should be implemented to protect Camellia pubipetala populations in two habitats according to local conditions,so as to further promote the populations＇ sustainable development.

关 键 词：毛瓣金花茶 种群 大小级结构 高度结构 开花率 

分 类 号：Q948.1[生物学—植物学]