【摘要】 在2014年夏季,通过对宿迁市不同结构绿地和对照点的空气负离子浓度以及温度、湿度、风速、光照强度进行监测分析,结果表明:不同结构绿地及对照点内空气负离子浓度日变化均明显,但负离子浓度日变化的波峰和波谷出现的时间和大小有所不同;负离子浓度均值从大到小的顺序是乔灌草、小阔叶乔草、大阔叶乔草、针叶乔草、篱草、草坪、对照点,分支点低的小阔叶乔草负离子浓度显著高于分支点高的大阔叶乔草;空气负离子浓度与不同结构绿地的温度都达到了显著负相关,与相对湿度达到显著正相关.更多还原

【Abstract】 This summer in 2014,after we monitored the concentration of negative air ions,temperature,humidity and the speed of wind and illumination of different greenbelts in Suqian and the mirror,it is suggested that the negative air ion concentration of different greenbelts and the mirror all changed obviously during the day,but varied in the values and the time when the concentration reached its peak or trough.Greenbelt types have been ranged in the average negative air ion concentration:arbor-shrub-herb,small tree-herb,large tree-herb,evergreen tree-herb,deciduous tree,herb and the mirror.with lower branch point has much higher negative air ion concentration than large tree-herb with higher branch point.There is notable negative correlation between negative air ion concentration and the temperature of different greenbelts,but for relative humidity and the concentration,it is positive.更多还原