【摘要】 2016年6-9月,采用抽样调查法对西藏自治区山南市行道树资源、结构特征及配置模式进行调查。结果表明,山南市行道树共计10科17属24种,其平均胸径、平均树高、平均冠幅分别为13.29 cm,7.31 m,3.72 m。应用最多的依次为杨柳科Salicaceae、蔷薇科Rosaceae、松科Pinaceae.,分别为6,5,3种,分别占调查行道树种类的25.00%,20.83%,12.50%。重要值排前3的依次为白柳Salixalba,北京杨Populus×beijingensis,雪松Cedrus deodara,其重要值依次为70.525,35.690,33.171,多样性指数较低。季相景观上,以春-秋季、秋季为主,夏季、春季、冬季景观薄弱。彩叶树种色系上,以白色、黄色系季相景观为主。垂直分层结构上,以2层模式为主(39.06%)。更多还原

【Abstract】 Sampling survey was carried out during June and September of 2016 on resources, structure and allocation of street trees in Shannan city, Tibet Autonomous Region. The results showed that there were 24 species of 17 genera and 10 families, with mean DBH, crown width and height of 13.29 cm, 7.31 m and 3.72 m respectively. The most common in the city was ordered by Salicaceae(6 species), Rosaceae(5 species) and Pinaceae(3 species), occupied 25.00%, 20.83% and 12.50% of the total investigated street trees. Importance value of street trees was followed by Salix alba(70.525), Populus × beijingensis(35.690) and Cedrus deodara(33.171), with low diversity index. Seasonal phenomena of street trees was dependent on spring-autumn and autumn aspection. Trees had white and yellow color. Vertical structure of street trees was mainly two layer(39.06%).更多还原