镇雄县珙桐群落特征及种群更新研究  

Characteristics of Community Structure of Davidia involucrata in Zhenxiong County

作　　者：夏嘉禹 周庆宏[2] 邓莉兰[1] 赵亚玲[1] 陈志华[3] 

机构地区：[1]西南林业大学林学院,云南昆明650224 [2]昆明学院农学院,云南昆明650214 [3]国家林业局南方航空护林总站百色站,广西百色533000

出　　处：《林业调查规划》2017年第2期30-34,共5页Forest Inventory and Planning

摘　　要：采用典型抽样法在镇雄县珙桐分布区设置11个样地,其中8个样地采用20 m×20 m样方法,3个样地采用实测法,样地总面积计1.6 hm^2,对珙桐群落进行野外调查,重点分析该地区珙桐群落的物种构成、区系特征及珙桐更新状况。结果表明,该地区珙桐群落植物种类十分丰富,共有蕨类植物6科7属8种,被子植物54科102属123种,且古老性、特有性强;群落被子植物的区系构成中以温带分布型为主,约占分布区类型的60.95%;珙桐群落中生活型以小型叶、高位芽植物为主,表明其生境较温暖湿润;珙桐群落径级结构呈现明显的倒金字塔形,表明种群更新较差,处于衰退阶段。This paper conducted an investigation of Davidia involucrata community on 11 plots, a total of 1.6 hm2 in Zhenxiong County, of which 8 samples using 20m ×20m sampling method, 3 samples meas- ured by the feild method. The investigation focused on community species composition, floristic composi- tion, structure characteristics and regeneration of Davidia involuerata. The results showed that： Davidia involuerata community was rich in species, a total of 6 families of ferns belonging to 7 genera and 8 spe- cies, 54 families, 102 genera and 123 species of angiosperms with feature of ancient, unique and strong; the Angiosperm Flora community composed in temperate type, accounting for about 60.95% ; The struc- ture of the community of Davidia involucrata was dominated by small leaf and high bud plants, indicating that the habitat was warm and humid; the diameter structure of Davidia involuerata showed obvious in- verted pyramid shape, which indicated that the population was poorly renewed and in the recession stage.

关 键 词：珙桐群落 区系特征 生活型 叶级 径级结构 镇雄县 

分 类 号：S792.119[农业科学—林木遗传育种]