南京不同绿地类型空气负离子浓度

Air Negative Ion Concentration of Different Greenbelt Types in Nanjing

[目的]研究南京市不同绿地类型空气负离子浓度的变化。[方法]选取3种不同类型的绿地,以空旷的硬质地面为参照,探讨4个季度空气负离子浓度的变化,并分析空气负离子浓度与气温、相对湿度的关系。[结果]不同绿地类型、不同季节空气负离子浓度变化及空气清洁度分别表现为:乔灌草型密林地(有水体)>乔灌草型密林地>乔灌型疏林地>空旷地,夏季>春季>秋季>冬季;空气负离子浓度与空气温度呈显著正相关,与空气湿度相关性不显著。[结论]该研究为城市居民生活环境的改善提供了理论依据。

[Objective]The study aims to analyze the changes of air negative ion concentration in Nanjing.[Method] Three types of green space were selected to explore the changes of air negative ion concentration in the four seasons,with open hard ground as the reference,and then the correlation between air negative ion concentration and air temperature(or air relative humidity) was analyzed.[Result] The air negative ion concentration and air cleanliness level of different green space types were shown as follows: arbor-shrub-grass jungle land(with water)> arbor-shrub-grass jungle ground> arbor-shrub sparse forest land> bare land.The air negative ions concentration and air cleanliness level in different seasons were shown as follows: summer > spring> autumn> winter.The air negative ion concentration was significantly positively correlated with air temperature and irrelevant to air relative humidity.[Conclusion] The research could provide scientific references for the improvement of urban environment.