4种纯林空气负离子浓度研究

利用负离子仪对上海市松江区中央公园的4种纯林内的空气负离子浓度进行测定，并通过比较分析，得出如下结果：桂花、紫叶李、蚊母树纯林在5月和7月份的空气负离子浓度日变化曲线呈双峰型，石楠呈单峰型；在6月和8月份紫叶李、蚊母树和石楠纯林日变化曲线相似，几乎平行；不同纯林日平均负离子浓度有差异，相关性分析表明，纯林内的空气负离子浓度与温度和相对湿度的几乎无显著相关性，为合理利用负离子资源提供一定依据。

Studies on Aero-anion ConcentratiOn in Four Kinds of Pure Forests

After measuring and analysing the aero-anion concentration in four kinds of pure forests in Songjiang District Centeral Park of Shanghai City by aero-anion counter, the results show that there are two wave crests in daily average aero- anion concentration curve in May and July of Osmanthus fragrans, Prunus cerasifera＇Pissardii＇and Distylium racemosum,in contrast a single-peak curve of Photinia serrulata; the daily average aero-anion concentration curves in June and August of Distylium racemosum,Prunus cerasifera＇Pissardii＇and Photinia serrulata are similar even parallel.The daily average aero- anion concentration is varied in different kinds of pure forest.Besides,through the analysis of correlation between aero- anion concentration ＆ temperature and also between aero-anion concentration ＆ humidity, the outcome is no observably negatively correlated in 4 kinds of pure forests.It provides a basis for rational use of aero-anion resources.