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对重庆地区的春兰伴生群落进行了区系成分分析和数量分类研究,结果表明:春兰的伴生群落共有维管植物68科110属131种,属种系数大,区系丰富度小;用Pcord4.0的Twinspan程序可以将春兰伴生群落划分为2个群系(马尾松林和糙皮桦林)5个群丛;5个群丛分别为:Ⅰ.马尾松+白栎—铁仔—五节芒+蝴蝶花+春兰群丛;Ⅱ.马尾松+白栎—柞木+华西小石积+马桑—五节芒+沿阶草+春兰群丛;Ⅲ.杉木+马尾松+板栗—菝葜+盐肤木—五节芒+春兰群丛;Ⅳ.马尾松—水竹+板栗—五节芒+春兰群丛;Ⅴ.糙皮桦—川楝+朴树—蝴蝶花+蕨+春兰群丛.在空间结构上,春兰样地分层明显,75%样地的乔木层可以划分为3个亚层;除一块为火烧迹地的样地外,其余样地灌木层盖度一般为20%以下,草本层盖度一般在10%以下.由CCA排序可知,经度、纬度、海拔、干扰强度、夏季郁闭度及坡向是对植被分布具有重要影响的环境因子.通过相关分析显示,与春兰在群落中的重要值呈极显著和显著相关的环境因子是枯落层厚度和群落冬季郁闭度.由马尾松、壳斗科落叶树和春兰组成的群落是典型的春兰适生伴生群落;保护由马尾松和壳斗科落叶树组成的混交林对于春兰的保护是有利的.
The results showed that there were 131 species belonging to 110 genera and 68 families in the commensal community of Chunlan, with a large genus coefficient and a small region richness. 0 Twinspan program can divide the community of Chunlan into two groups (Pinus massoniana and Betula platyphylla) five groups; the five groups are: Ⅰ Masson pine + white oak - Tiezi - + Pansy + Chunlan massif; Ⅱ. Masson pine + white oak - oak + Huaxi Xiaozishi plot + Massan - Wujiamang + along the steppe + Chunlan; Ⅲ. Chinese fir + Masson pine + chestnut - Rhus chinensis - Wu Mantang + Chunlan group; Ⅳ. Masson - Shuizhu + chestnut - Wu Mantang + Chunlan group; Ⅴ. Pigeon bark - Chuan Melia + Hackberry - butterfly + fern + Chunlan group. In the spatial structure, the Chunlan plot stratified obviously. The 75% plots of the tree layer can be divided into three sub-layers. Except for a plot of burned-out plots, the cover plots of the remaining plots were generally below 20% Herbarium coverage is generally below 10%. According to CCA rankings, longitude, latitude, altitude, disturbance intensity, summer canopy density and aspect are the major factors influencing vegetation distribution The correlation analysis showed that the environmental factors that were significantly and significantly related to the important values of Chunlan in the community were the litter layer thickness and winter canopy density.The community composed of Pinus massoniana, Pinaceae deciduous trees and Chunlan was Typical Chunlan habitat associated communities; protection of mixed forests consisting of Pinus massoniana and Pinaceae deciduous trees is beneficial for the protection of Chunlan.