| 降雨对北方城市5种典型城市绿化树种叶面滞尘的影响 |
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| 引用本文： | 刘辰明,张志强,陈立欣,邹瑞,张璐,高源,李冬梅. 降雨对北方城市5种典型城市绿化树种叶面滞尘的影响[J]. 生态学报, 2018, 38(7): 2353-2361 |
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| 作者姓名： | 刘辰明 张志强 陈立欣 邹瑞 张璐 高源 李冬梅 |
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| 作者单位： | 北京林业大学水土保持学院教育部水土保持与荒漠化防治重点实验室 |
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| 基金项目： | 国家林业公益性行业科研专项（20130430103）；北京市教育委员会科学研究与研究生培养共建项目 |
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| 摘 要： | 城市树木和森林植被净化大气颗粒污染物的功能受到了广泛的重视,但由于受多种植被特征与环境因素的影响,定量评价城市植被净化大气颗粒污染物功能非常困难。研究了不同降雨条件下大叶黄杨、银杏、栾树、五角枫、杜仲5种我国北方城市绿化典型树种叶面滞尘量的变化特征。在选定的样树冠层分上、中、下3层和东、南、西、北4个方向,采集成熟叶片,采用刷洗样本叶表,抽取水样及分级抽滤并烘干称重的方法,测定这5种树种降雨后12d(夏季累积滞尘量)、14mm降雨后(小雨)、29mm降雨后(中雨)以及室内模拟降雨30mm/h(15mm雨量)后叶片表面不同粒径大气颗粒污染物的滞留量。研究结果表明:降雨对不同粒径颗粒物去除能力有较大差异,除银杏以外,PM10以上颗粒物更容易去除;小雨对颗粒物的冲刷能力有限;中雨可以冲刷掉50%以上总颗粒物;室内模拟强降雨可以冲刷掉90%以上颗粒物,随着降雨增大,各粒径颗粒物随之冲刷量增加;同时叶表结构对抗冲刷能力有显著影响,革质叶片更容易滞尘及冲刷,绒毛结构滞尘能力较低,抗冲刷能力较强;北方大叶黄杨具有综合去除空气中颗粒物优势(小雨TSP冲刷量为(775.06±33.99)mg/m~2),银杏具有去除细颗粒物优势(中雨PM_(2.5)冲刷量为(426.55±40.83.99)mg/m~2)。
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| 关 键 词： | 大气颗粒物 PM2.5 树种 滞尘 降雨冲刷 |
| 收稿时间： | 2017-04-21 |
| 修稿时间： | 2017-11-16 |
Impacts of rainfall on leaf PM (airborne particulate matter) detention in five commonly used urban tree species in northern China |
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| LIU Chenming,ZHANG Zhiqiang,CHEN Lixin,ZOU Rui,ZHANG Lu,GAO Yuan and LI Dongmei. Impacts of rainfall on leaf PM (airborne particulate matter) detention in five commonly used urban tree species in northern China[J]. Acta Ecologica Sinica, 2018, 38(7): 2353-2361 |
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| Authors: | LIU Chenming ZHANG Zhiqiang CHEN Lixin ZOU Rui ZHANG Lu GAO Yuan LI Dongmei |
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| Affiliation: | Key Lab. Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,Key Lab. Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,Key Lab. Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,Key Lab. Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,Key Lab. Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China,Key Lab. Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China and Key Lab. Soil and Water Conservation and Desertification Combating, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | |
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| Keywords: | atmospheric particulates PM2.5 tree species foliar dust retention rainfall effected dust removal |
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