兰州市屋顶绿化3种植物配置模式生态效益研究

Study on ecological benefits of roof greening withthree plant combination patterns in Lanzhou

摘要:

为研究屋顶绿化的生态效益,以兰州市御景东方住宅小区活动中心三楼绿化屋顶为研究对象,以无绿化植物的裸露屋顶为对照,进行乔-灌、灌-草和地被3种植物配置模式的气温、空气相对湿度和空气负氧离子含量测定。结果表明:与对照相比,乔-灌和灌-草配置模式均有极显著的降温效果,平均降低温度为乔-灌(10.36℃)＞灌-草(6.27℃)＞地被(3.92℃),乔-灌和地被两种配置模式增湿效果没有显著差异,而灌-草配置模式能显著提高环境的相对湿度,增湿幅度灌-草(3.15%)＞乔-灌(2.81%)＞地被(2.80%),乔-灌和地被配置模式有显著地增加空气负氧离子的效果。空气负氧离子分子浓度为:乔-灌(63.42 个/cm³)＞灌-草(52.13 个/cm³)＞地被(37.59 个/cm3)＞对照(33.98 个/cm³)。

Abstract:

The ecological benefits of roof greening with tree-shrub,shrub-grass and ground-cover plant patterns were studied in Lanzhou.The temperature,relative air humidity and air negative oxygen ions under different patterns were determined.The results showed that tree-shrub and shrub-grass pattern had extremely significant cooling effect,and cooling effect ranking was tree-shrub (10.36℃) ＞ shrub-grass (6.27℃) ＞ ground-cover plant (3.92℃).No significant difference in humidification effect was found between tree-shrub and ground-cover,and the shrub-grass pattern could significantly increase the relative humidity of the environment.The humidification ranking was shrub-grass (3.15%) ＞ tree-shrub (2.81%) ＞ ground-cover plant (2.80%).Tree-shrub and ground-cover plant patterns showed significant improving effect on air negative oxygen ions,and the ranking for improving air negative oxygen ions was tree-shrub (63.42 ions/cm³) ＞ shrub-grass (52.13 ions/cm³) ＞ ground-cover plant (37.59 ions/cm³) ＞CK (33.98 ions/cm³).