山东野生杜鹃花群落特性的调查

通过对泰山、五莲山典型标准地调查，结果表明迎红杜鹃、照山白分布于次生栎林、赤松栎林、油松栎林和高海拔灌丛４种群落类型中，反映出较强的适应性。映山红主要分布于五莲山赤松栎林，具有喜温暖湿润的特性。迎红杜鹃和映册红在五莲山赤松栎林群落中，各龄阶的株数分布均匀，单位面积株数较多，在全光照环境下则相反，且老龄株比例过大。

A Study on the Community Fan Jinhui Properties of Rhodedendren Native to Shandong

Rh.mucronulatum and Rh.micranthum distribute in four forest communities:Quercus,Pinus tabulaeformis-Quercus,Pinus densiflora-Quercus and scrubs of Mt.Tai or Mt.Wulian.Both appear greatest number per plot in pinus densiflora-Quercus community,then in Pinus tabulacformis-Quercus community of Mt.Wulian.The results of standard plot investigation show that Rh.mucronulatum and Rh.simisii are mainly distrbuted in the Pinus densiflora-Quercus-Rhododendron ccotype niches,in Mt.Wulian,and the numbers of plants in each age class are even distributed and the number of plant per unit area is higher.However under full sunlight condition,the plant numbers in each age class are uneven,and the plant number per unit area is lower,more than that the rate of old individual is higher.Therefore,cutting off the over storey can prompt flowering and new shoot growth,but this treatment can affect adversely the population developments.