冬季不同植物配植类型绿地内PM2.5致变因素研究  

A Study of Mutative Factors to PM2.5 in Green Spaces with Different Arrangements of Plants in Winter

作　　者：张斌斌 伍文忠 孙丰宾[2] 齐锋[1] 晏海[1] 邵锋[1,3] Zhang Binbin;Wu Wenzhong;Sun Fengbin;Qi Feng;Yan Hai;Shao Feng(School of Landscape Architecture,Zhejiang Agriculture&Forestry University,Hangzhou 311300,Zhejiang,China;School of Agriculture,Heilongjiang Bayi Agricultural University,Daqing 163319,Heilongjiang,China;School of Landscape Architecture,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]浙江农林大学风景园林与建筑学院,杭州311300 [2]黑龙江八一农垦大学农学院,黑龙江大庆163319 [3]北京林业大学园林学院,北京100083

出　　处：《中国城市林业》2019年第5期25-30,共6页Journal of Chinese Urban Forestry

基　　金：国家自然科学基金“基于局地气候区分类的城市热环境时空变化特征及其主要景观驱动因子研究”(51508515)

摘　　要：文章以浙江农林大学东湖校区内3种不同植物配植类型绿地为对象,采用定点观测法,研究了不同配植类型绿地对PM2.5浓度的影响,总结了冬季不同温度、相对湿度、风速及光照强度等气象因子条件下绿地内PM2.5浓度的变化规律。研究结果表明:同一时段PM2.5浓度大小依次为复层混交林>乔草>疏林草坪,同一配植类型绿地内PM2.5浓度上午显著大于下午;植物群落结构特征指标与PM2.5的聚集和扩散具有显著相关性,PM2.5浓度与郁闭度、种植密度、常绿树种数量占比成正比关系;不同绿地内PM2.5浓度均呈“L”型曲线变化规律;各气象因子对PM2.5浓度的影响能力大小依次为相对湿度>温度>风速>光照强度,其中PM2.5浓度与温度及风速呈负相关、与相对湿度呈正相关、与光照强度无明显相关性。With three pieces of green spaces composed of different arrangements of plants in East Lake campus,Zhejiang Agriculture and Forestry University,this paper analyzes the influence of different arrangement types of plants to the PM2.5concentration using fixed point observation,and summarizes the law of change of the PM2.5concentrations in the green spaces under different meteorological factors in winter,including temperature,relative humidity,wind speed and illumination intensity.The results reveal that the PM2.5 concentrations in different green spaces in the same period follow the order of stratified mixed stands>trees-grass>lawns with sparse forest,The PM2.5 concentrations in the green space with the same plants arrangement type is significantly higher in the morning than in the afternoon.The characteristic indexes of plant community structure is strongly related to the aggregation and the diffusion of PM2.5.The concentration of PM2.5 is positively correlated with the canopy density,planting density and the proportion of evergreens.Moreover,the change of the PM2.5 concentrations in different green spaces present a“L”curve.The capacity of different meteorological factors to affect the concentration follow the ranking of relative humidity>temperature>wind speed>illumination intensity.Among them,the concentration of PM2.5 is negatively correlated with the temperature and the wind speed,positively correlated with the relative humidity and not apparently related to the illumination intensity.

关 键 词：植物配植类型 PM2. 5 浓度 气象因子 相关性分析 变化规律 

分 类 号：X51[环境科学与工程—环境工程]