文献类型：期刊文献

中文题名：城市公园外侧防护林结构对外源PM_(2.5)的消减作用

英文题名：The Effect of Forest Shelter Belt on Subduction of PM_(2.5) in Urban Parks

作者：包红光[1] 王成[1] 郄光发[1] 杜万光[1] 孙丽[1]

第一作者：包红光

机构：[1]中国林业科学研究院林业研究所//国家林业局森林培育重点实验室//国家林业局城市森林研究中心

年份：2016

卷号：25

期号：6

起止页码：987-993

中文期刊名：生态环境学报

外文期刊名：Ecology and Environmental Sciences

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：林业公益性行业科研专项经费课题(201304301-05);国家十二五科技支撑计划重大项目课题(2011BAD38B03)

语种：中文

中文关键词：城市公园;防护林;PM2.5;消减作用

外文关键词：urban park; shelter belt; PM2.5 concentration; subduction;

分类号：X173

摘要：城市公园是居民休闲的重要场所,其外侧防护林是围合公园景观、消减外源污染的重要屏障。为研究城市公园不同配置结构外侧防护林内PM2.5浓度的时空动态变化规律及其对外源PM2.5污染的消减作用,通过布置样带监测城市公园不同配置结构外侧防护林（阔叶乔木林、阔叶乔草林、针阔混交林）距道路不同宽度处PM2.5浓度,分析影响PM2.5浓度的因素,并对不同配置结构外侧防护林对外源PM2.5污染的消减作用进行计算。结果表明,（1）城市公园不同配置结构外侧防护林内PM2.5浓度日变化规律大致相似,均呈现白天低晚上高的趋势,9：00—15：00时段防护林内PM2.5浓度达到国家标准II类功能区浓度质量要求,5：00时防护林内PM2.5浓度污染最严重,超出国家标准II类功能区浓度质量要求237.36%-335.31%。（2）城市公园不同配置结构外侧防护林在15-45 m宽度范围内PM2.5浓度与路缘处PM2.5浓度相近,阔叶乔木林和阔叶乔草林在60 m宽度前后出现PM2.5浓度升高的现象。（3）城市公园外侧防护林11：00、13：00时对PM2.5浓度污染消减作用最强,19：00、7：00时对PM2.5浓度污染消减作用相对较差;阔叶乔木林、阔叶乔草林距道路165 m时消减作用相对较好,针阔混交林距道路45 m时消减作用相对较好,呈正消减作用。（4）PM2.5浓度与平均风速、温度、相对湿度呈极显著相关,与其他气象因子相关性不显著。
Urban parks are regarded as important leisure place for residents,while the forest shelter belt in urban parks play an important role in controlling pollutions.The spatial and temporal variations and subduction of PM2.5 concentration in forest shelter belt with different configuration structures were observed by setting sampling belts in urban park.Furthermore,the effects of shelter belts on subduction of PM2.5 in urban park was evaluated in the summer of 2014.The results showed that：（1） In forest plots with different configuration structures in shelter belt,the trend of diurnal variation of PM2.5 concentration was lower in the daytime while as high in the evening.（2） PM2.5 concentration reached the quality requirement of National Standard II in different configuration structures between 9：00-15：00 and exceeded the quality requirement ranging from 237.36% to 335.31% in 5：00.PM2.5 concentration accumulated in the broad-leaved forest and broad-leaved/herbs mixed forest around 60 m in width,while kept similar ranging from 15 m to 45 m in forest shelter belt with different configuration structures.（3） The subduction effect of PM2.5 in different configuration structures resulted in the highest efficiency at 11：00 and 13：00,but much low at 19：00 and 7：00.Relatively high purification efficiency was found 165 m far away from the road in both broad-leaved forest and broad-leaved/herbs mixed forest,and 45 m far away from the road in coniferous and broadleaved mixed forest.And（4） PM2.5 concentration in different configuration structures in shelter belt is closely related with average wind speed,temperature,and relative humidity.