城镇绿地对空气质量的影响--以中山市小榄镇为例

对中山市小榄镇公园、街道、居住区等不同地区的空气质量进行了测定．结果表明：公园、苗圃、金菊花园、镇府大院和小榄中学等绿化好、总绿量大的地带，CO2浓度Ψ(CO2)／10^-6]和含菌量(n／m^-3)明显较低，负离子浓度明显较高；街道、新永路民居、商场、工厂、车站和果菜批发市场等绿化差、总绿量小的地带，Ψ(CO2)／10^-6和含菌量明显偏高，负离子浓度明显偏低．街道上空的Ψ(CO2)与车流量之间有极显著相关关系Ψ(CO2)与人流量之间相关关系不显著．

EFFECT OF GREENLAND ON AIR QUALITY IN XIAOLAN TOWN, ZHONGSHAN CITY

Park, nursery, Jinju Garden residential area, government yard and Xiaolan Middle School, are wellas air quality are studied and some places are found densely planted with green trees and well planned with larger areas of green land. The study indicates where there are low CO 2 concentration and bacteria amount, there is nigh air negativeion concentration. For example, there are fewer trees and green land in Street, Xingyong Road residential area, supermarket, factory, bus station and wholesale market, where CO 2 concentration and bacteria amount are higher, while air negativeion concentration is low. The CO 2 concentration of the street is highly related to vehicle flow, but it is hardly related to pedestrian flow. Fig 3, Tab 5, Ref 18