广州市10种常见园林灌木生态特性的比较

Comparison of Ecological Characteristics of Ten Landscape Shrubs Popular in Guangzhou City

对广州市10种常用园林灌木的固碳释氧、降温增湿、滞尘和吸收S、Cl能力等进行对比研究。结果表明:单位叶面积和单位绿化面积的固碳释氧量都以海桐最大;降温增湿亦以海桐最大;叶片吸收S含量大小顺序为大红花Hibiscus rosa-sinensis>夹竹桃Nerium indicum>桂花Osmanthus fragrans>紫薇Lagerstoemia indica>鸡蛋花Plumeria rubra cv.Acutifolia>灰莉Fagraea ceilanica>海桐Pittosporum tobira>美花红千层Callistemon citrinus>黄叶假连翘Duranta repens cv.‘Dwarf Yellow’>黄金榕Ficus microcarpus cv.‘Golden Leaf’。叶片吸收Cl含量大小顺序为鸡蛋花Plumeria rubra cv.Acutifolia>大红花Hibiscus rosa-sinensis>紫薇Lagerstoemia indica>美花红千层Callistemon citrinus>夹竹桃Nerium indicum>灰莉Fagraea ceilanic>黄叶假连翘Duranta repens cv.‘Dwarf Yellow’>黄金榕Ficus microcarpus cv.‘Golden Leaf’>桂花Osmanthus fragrans>海桐Pittosporum tobira;鸡蛋花的滞尘能力强。综合而言,海桐生态功能最强,黄金榕最弱。

This paper makes a comparative analysis of ten main garden shrubs(Nerium indicum, Osmanthus fragrans, Lagerstoemia indica, Pittosporum tobira, Ficus microcarpus ‘Golden Leaf', Duranta repens ‘Dwarf Yellow', Fagraea ceilanica, Plumeria rubra ‘Acutifolia', Callistemon citrinus, Hibiscus rosa-sinensis) of some ecological characteristics, such as carbon fixation and oxygen release, cooling and humidifying, dust-retention and S and Cl assimilation ability. The results indicate that the capacity of carbon fixation and oxygen release of Pittosporum tobira by one square meter leaf is stronger than others. Meanwhile the capacity of cooling and humidifying of Pittosporum tobira is strongest by one square meter greenland. The ability of S assimilation by leaf is in the following order: Hibiscus rosa-sinensis > Nerium indicum > Osmanthus fragrans> Lagerstoemia indica > Lagerstoemia indica > Plumeria rubra ‘Acutifolia'> Fagraea ceilanica > Pittosporum tobira >Callistemon citrinus > Duranta repens.‘Dwarf Yellow'>Ficus microcarpus ‘Golden Leaf', and the ability of Cl assimilation by leaf is in the following order: Plumeria rubra cv. ‘Acutifolia'> Hibiscus rosa-sinensis > Lagerstoemia indica > Callistemon citrinus > Nerium indicum > Fagraea ceilanica > Duranta repens ‘Dwarf Yellow'> Ficus microcarpus ‘Golden Leaf'> Osmanthus fragrans > Pittosporum tobira. The dust-retention amount of Plumeria rubra ‘Acutifolia'is largest. Based on the systematical and comprehensive analysis, the ecological benefits of Pittosporum tobira is best while Ficus microcarpus ‘Golden Leaf' is weakest.