【摘要】 为今后行道树绿化结构及功能研究奠定基础,从城市生态角度出发,采用LI-6400红外气体分析仪,实测大连市内几种常见绿化树木的净光合速率,计算其在不同月份吸收二氧化碳和释放氧气的能力。结果表明:各树种日固碳释氧能力表现为夏季>秋季>春季,在乔木树种中,日固碳释氧能力的排列顺序为榆树>白桦>元宝枫>雪松>杜仲>国槐;灌木树种中,日固碳释氧能力的排列顺序为碧桃>连翘>榆叶梅>大叶黄杨。更多还原

【Abstract】 To lay a foundation for the further research of the greening structure and function of afforestation trees along the main road,from the view of the city ecology,the LI-6400 infrared gas analyzers are used to practically measure the net photosynthetic rate of several species of common afforestation trees in Dalian city,and to calculate their ability of absorbing carbon dioxide and releasing oxygen in different months of a year.The result indicates that the sequence of the ability of the trees’ daily fixing carbon and releasing oxygen presents: summer > autumn > spring,and among the arbor trees,the sequence of their ability of daily fixing carbon and releasing oxygen presents: Ulmus pumila > Betula platyphylla > Acer truncatum > Cedrus deodara > Eucommia ulmoides > Sophora japonica,and among shrub trees,the sequence of their ability of daily fixing carbon and releasing oxygen presents: Pruns persica var.duplex > Forsythia suspensa > Amygdalus triloba > Euonymus japonicus.更多还原