湖南长沙、株洲、湘潭三市园林绿化植物区系分析

The Flora Analysis of Garden Greening Plants in Changsha-Zhuzhou-Xiangtan Clusters of Cities

通过调查湖南长沙、株洲、湘潭城市群园林绿化植物,结果表明:3个城市共有种子植物86科,183属,266种,占湖南种数的5 5%。3个城市绿化植物分布有5个种以上的科18科,143种,占3个市种数的53 7%。3个市植物区系具有热带性亲缘、温带性成分较多的特征,这些与湖南植物区系特征相似。在3个市绿化植物种数中,国外种占1/4多,这些种将面临3个市周期性的特殊气候;经受突然冰冻和夏秋的高温干旱的考验,3个市园林绿化植物的发展方向应以中亚热带植物为主。

The results indicate that the flora in three cities has characteristic of tropic genetic relationship and lots of temperate elements which is similar with that in Hunan.Over one fourth species in three cities is import,and these plants face with the challenge of the typical climate:abrupt freezing temperature,high temperature,drought.So,the garden greening plants in these cities should develop more mid-subtropical zone plants.