广州市8种常用园林植物生态特性比较

对广州市8种常用园林植物的固碳释氧、降温增湿、杀菌滞尘和吸收S、Cl能力等进行对比研究。结果表明:单位叶面积的固碳释氧量以红花羊蹄甲最大;单位绿化面积则以尖叶杜英最大;降温增湿效果则以红花羊蹄甲最大;叶片吸收S量以尖叶杜英和大叶榕较大,细叶榕、秋枫和高山榕较小,叶片吸收Cl的能力则与之相反;尖叶杜英和秋枫的滞尘能力强;大叶榕的抑菌率最高,达(85.4±1.7)%。综合而言,尖叶杜英生态功能最强,秋枫最弱。

Comparison of Some Ecological Characteristics of 8 Main Gardens Plant Species in Guangzhou

This paper made a comparative analysis of 8 main gardens plant species(Ficus microcarpa,Bombax ceiba,Elaecarpus apiculatus,Ficus altissima,Bischofia javanica,Bauhinia blakeana,Cassia surattensis,and Ficus virens var.sublanceolata)of some ecological characteristics,such as carbon fixation and oxygen release,temperature drop and humidity increase,dust-retention ability,the rate of inhibiting bacteria,and dry content of S and Cl assimilation.The results indicated that the capacity of carbon fixation and oxygen release of Bauhinia blakeana by one square meters of leaf was stronger than others.Meanwhile the capacity of carbon fixation and oxygen release of Elaecarpus apiculatus was strongest and temperature drop and humidity increase of Bauhinia blakeana was strongest by one square meters of greenland.The dry content of S assimilation by leaf was in the following proper order:Elaecarpus apiculatus>Cassia surattensis>Ficus virens var.sublanceolata>Bauhinia blakeana>Bombax ceiba>Ficus altissima>Bischofia javanica>Ficus microcarpa,but the dry content of Cl assimilation by leaf was opposite to this order.The dust-retention amount of Elaecarpus apiculatus was largest and Bischofia javanica was larger.The rate of inhibiting bacteria of Ficus virens var.sublanceolata was highest,up to(85.4±1.7)%.Based on the systematical and comprehensive analysis,the ecological benefits of Elaecarpus apiculatus was best while Bischofia javanica was weakest.