城市绿地空气微生物浓度研究——以北京元大都公园为例

本文选择北京市元大都遗址公园,在2005年9月对公园内不同绿地类型及其旁边道路空气微生物浓度进行了对比研究,结果表明:从早晨8:00—14:00,不同类型绿地微生物浓度呈下降趋势,14:00—18:00略有升高;绿地内空气微生物浓度远远低于绿地旁边道路空气微生物浓度,与道路微生物浓度差异显著;在较大时间尺度上,大部分绿地内空气微生物浓度无显著差异,说明树木种类可能对绿地内空气微生物浓度的影响差异不明显;通过评价,绿地中空气微生物污染大都处在清洁和较清洁的范围之内,而道路则处在轻微污染和污染的范围内。

Study on Airborne Microbes Concentration of Urban——Greenbelts in Beijing Yuan Dynasty Capital City Wall Relics Park

By the research on airborne microbes concentration of different greenbelts in Yuan Dynasty capital city wall relics park and its adjacent roads in September,2005,the results indicated: the concentration of airborne microbes of all greenbelts was on the trend of descend from 8 to 14 o'clock with some increasing after 14 o′clock;the concentration of airborne microbes in the greenbelts was far more lower than that in roads aside greenbelts.The airborne microbes concentration of greenbelts was significant difference with its aside roads.In a long period,the concentration of airborne microbes in the most greenbelts had no significant difference,which showed the influence of tree species to airborne microbes concentration was probably not significant;From the results of estimate,the pollution of airborne microbes was in the level of cleanness and sub-cleanness,whereas the roads were in the level of light pollution and pollution.