植物群落对空气负离子浓度影响的研究

Improvement of Negative Air Ions Concentration by Plant Communities

对上海地区常见的21个群落距地面1.5m的空气正、负离子浓度进行了测试分析,结果表明：群落增加空气负离子浓度极显著高于水泥地,经多重比较发现草坪提高空气负离子浓度的能力最弱,竹类群落提高空气负离子浓度的能力最强;空气质量指数CI值呈正态分布,CI值在0.5～0.7的群落最多;竹类群落的CI最高,均值为0.83,比草坪CI值提高了117%;针叶群落与阔叶群落的CI相近,比草坪CI值提高了70.7%;CI与空气负离子浓度呈极显著正相关,与群落叶面积指数呈显著正相关,与群落优势种的胸径、树高无关;聚类分析结果表明,植物群落可明显改善微环境的空气质量,其中改善空气质量能力较高的群落为群落8、15、16、17等,改善空气质量的能力较差的是草坪、群落12、群落9、群落7。

Based on the analysis of 1.5 m＇ s negative and positive air ions concentration about 21 plant communities of Shanghai, results showed that：the ability of increasing negative air ions concentra- tion about plant communities was markedly compared with no greening, grass＇s capability was lowest and bamboo community was highest by LSD. The distribution of CI was normal,and CI of most plant communities was in 0. 5-0. 7. The＇highest CI was bamboo communities, average value equal to 0. 83,increasing 117% compared with grass. The CI of coniferous and broad-leaved communities was increased 70. 7% by grass. As for CI, there were extremely significant correlation to negative air ions concentra- tion,significant correlation to leaf area index and no relative correlation to dominant species of plant community. The plant communities were able to improve air quality of mini-surrounding. By cluster analysis, grass, No. 12, No. 9, No. 7 had lower ability about improving air, No. 8,15,16,17 had higher.