都匀市螺丝壳鹅掌楸种群生态学研究

Research on Population Ecology of Liriodendron chinense in Luosike Mountain in Duyun City

[目的]为保护鹅掌楸种群提供科学依据。[方法]采用10m×10m取样方法对分布于都匀市螺丝壳山的鹅掌楸种群进行调查，结合在样方内对灌木层用4m×4m，草本层用1m×1m样方进行调查，从种群大小级和静态生命表的生存分析等方面，研究该种群的动态特点。[结果]种群大小和种群静态生命表的生存分析均表明，螺丝壳鹅掌楸种群的大小结构类型为衰退型。S1级株数少，种群增长的能力极弱，S3～S6级的繁殖株数少，产生种子的能力受到影响，更新困难。根据高度级与胸径大小级划分的种群大小统计结果一致。[结论]该种群属衰退型，更新存在极大的困难，应加强综合保护；

[ Objective] The study was to provide a scientific base for the protection of Liriodendron chinense population, [ Method] L. chinense population distributed in Luosike mountain in Duyun City was investigated by the exampling method of 10m × 10m, and combined with investigation on L. chinense population in shrub stratum by 4 m ×4 m exampling method and on that in herb stratum by 1 m ×1 m exampling method within the quadrat, the dynamic characteristics of the population were studied on the existing analyses of population size and static state life ta- ble etc. [ Result] Analysis of existing analyses of population size and population static state life table all showed that the structure type of L. chlnertse population was declination type. The plant number of S1 grade was little and the growth ability of poputation was very weak. The propagation plant of S3 - S6 grade was little and its ability of producing seed were influenced, so its renewing was difficult. Statistical results of population size divided according to the height class and thorax diameter class were uniformity. [ Conclusion] The population belong to declination type with extremely renew difficulty, and its comprehensive protection should be strengthened.