城市绿地群落环境效应研究——以扬州古运河风光带生态林为例

Studying on Environmental Effect of Urban Forest along the Grand Canal in Yangzhou

扬州古运河风光带绿地生态环境效应测试表明,绿地树木对空气微尘有着显著的阻挡、截留和吸滞作用,复层林分的滞尘效应优于园路、优于草坪。绿地群落可较硬质园路区降低噪音约7dB,可较草坪区降低噪音约4dB。落叶树种的平均固碳释氧量显著高于常绿树种,且常绿乔木的平均固碳释氧能力是落叶乔木的71%、常绿灌木的平均固碳释氧能力是落叶灌木的67%;不同类型树种的平均固碳释氧能力,总体趋势为:落叶灌木>落叶乔木>常绿乔木>常绿灌木。

Studies on environmental effect of the plants growing on the scene land along Grand Canal in Yangzhou indicated that： plants had significant effect on dust accumulating, remaining and absorbing. The dust accumulation effect of ecological environmental protection complex mode was better than garden road and lawn. The greenbelt could reduce noise for about 7 dB than garden road and about 4 dB than lawn The average amount of Carbon fixation and Oxygen release for each leaf of every square meters a day of defoliated trees was more than evergreen, evergreen arbors＇ average amount of Carbon fixation and Oxygen release were 71% of defoliated arbors, and evergreen shrubs＇ were 67% of defoliated shrubs. As a whole, the trend was： defoliated shrubs than defoliated arbors＇, and than evergreen arbors and than evergreen shrubs.