中文摘要：

对福州市仓山区9条主干道绿化带的行道树树种、种植结构和交通噪声、车流量进行调查．结果表明，在8：00～12：00及14：00～17：00时段，中心城区干道交通噪声在65．28～77．38dB之间，污染较严重．绿化带配置方式可分为5种类型，其中单一乔木型和乔木＋灌木型占76．5％．9条干道交通噪声的平均消减率为0．42％～7．31％，在监测点b（行道树冠在人行道方向的垂直投影点）处消减率以六一南路的最高（为3．86％），点e（离b点3m）处则以三高路的最高（为5．90％）．结合行道树种与配置方式，以乔木＋乔木＋灌木＋草坪型（白兰花＋大花紫薇）的减噪效果最佳（点b和c处减噪率分别为3．95％和7．28％）．因中心城区干道绿地面积有限，行道树树种及其配置模式是影响绿化带减噪效果的关键因素．

英文摘要：

Focusing on the species and planting structure of the roadside trees, traffic noise and vehicle flow in 9 main roads in downtown of Cangshan District, Fuzhou are investigated. The results showed that, the traffic noise were 65.28 -77.38 dB and the noise pollution were heavy in 8： 00- 12：00 and 14：00 - 17： 00. The configuration modes could be divided into 5 types, with the single arbor type and arbor ＋ shrub type totally accounting for 76. 5 % of them. The average noise-reducing rates of the roadside trees unevenly varied from 0.42% to 7.31%. In monitoring point B, which was the roadside tree＇s crown vertical projection point in the direction of sidewalk, the highest average noise-reducing rate was in South Liuyi Ave. （3.86%） , and the highest reduc- ing rate of monitoring C （3 m away from the point b） was in Sangao Ave. （5.90%）. As to the tree species and configuration, the type of arbor ＋ arbor ＋ shrub ＋ grass has the best noise reduction effect （the noise-reducing rates were 3.95% and 7.28% respectively）. Due to the limited areas of green land in downtown, roadside tree species and their configuration mode must be included as the key factors that affect the noise reduction effects.