鼎湖山不同生境紫背天葵居群的自然生长特性  

Natural growth characteristics of Begonia fimbristipula Hance population in different habitats of Dinghu Mountain

作　　者：邵玲[1] 梁广坚[1] 陈雄伟[1] 陈刚[1] 徐锦海[1] 马志涛[1] 

机构地区：[1]肇庆学院生命科学学院,广东肇庆526061

出　　处：《广东农业科学》2013年第21期42-45,57,共5页Guangdong Agricultural Sciences

基　　金：广东省科技计划项目(2010B060200012)

摘　　要：对鼎湖山濒危植物紫背天葵的自然居群进行研究,分析其生长特性及濒危原因.结果表明：紫背天葵适生的温湿范围狭窄,属典型的阴生性和酸性土植物（pH 3.0～4.2）,生长周期为当年的1～7月份,高温高热是其夏眠的主因.生存环境的脆弱性和人为干扰导致其种群密度破碎化,并呈现绿叶生态型集群化的生长.在此基础上扼要提出对其野生资源保护的相关措施.This paper studied the natural population of endangered plant Begoniafimbristipula in Dinghu Mountain, and analyzed their growth characteristics and endangered reasons. The results showed that suitable temperature and humidity range for B. fimbristipula was narrow, B. fimbristipula belonged to typical shade plant and acidophilus plant （pH 3.1-4.2）. Growth cycle of B. fimbristipula was from January to July, high temperature and high fever were main reasons of summer dormancy.Vulnerability of living environment and human disturbance leaded to fragmentation of population density, and B. fimbristipula population presented the growth of green ecological clustering. At last, countermeasures for wild resources protection were put forward.

关 键 词：紫背天葵 鼎湖山 野生居群 生长特性 

分 类 号：S636.9[农业科学—蔬菜学]