ALIYABaidourela,UMUTHalik,DILINUER.The Foliar Dust Size Characteristics of Greening Trees in Aksu，Northwest China[J].Northern Horticulture,2016,40(10):63-69.[doi:10.11937/bfyy.201610017]
阿克苏市常见绿化树种叶面尘粒径特征
- Title:
- The Foliar Dust Size Characteristics of Greening Trees in Aksu，Northwest China
- 文献标志码:
- A
- 摘要:
- 行道树拦截了近地面大气PM的迁移，被叶面滞留的PM难以重新扬起，从而降低对人类的危害。不同绿化树种的滞尘能力及叶面尘粒径特性有所差异，且树种滞尘受到自身、自然及人为等多种因素的干扰。该试验对阿克苏11种树种叶面尘及自然降尘进行了采集，并对其进行了粒度分布特征分析，得出了其PM2.5、PM10含量，与自然降尘粒度分布进行了相应比较。结果表明：与二球悬铃木、圆冠榆和新疆杨的叶面尘颗粒物附着密度高，滞尘稳定性较强相比之下，沙枣、梨树和槐树叶面尘颗粒物附着密度低；叶面尘PM2.5、PM10含量最高的树种分别为沙枣、葡萄，含量分别为0.68%、3.59%；自然降尘中细小颗粒物所占体积分数较小，而叶面尘中细小颗粒物所占体积分数较大，叶面尘粒径中值表现为工业区＞交通枢纽区＞居民区＞清洁区。自然降尘的粒径中值为清洁区＞交通枢纽区＞工业区＞居民区，二者差异较大。
- Abstract:
- Urban greening trees could capture the particle matters near to the ground，and these particle matters (dusts in arid area) hard to re-raised，thereby reducing the harm effect to human beings.Therefore,the dust capturing abilities differed between tree species，cause of trees physical characteristics，meteorological effect and human disturbing，etc.11 common trees species in Aksu，Northwest China，were selected to determine their foliar dust and natural landing dist also collected to observe by Microtrac size analyzer.Their particle size distribution were analyzed，PM2.5 and PM10 were selected.Foliar dust and natural landing dust were studied contractively and found out the difference.The results showed that Platanus acerifolia, Populus alba var.pyramidalis，Ulmus densa foliar dust particulates density were high，and had stable dust retaining ability.While，Elaeagnus angustifolia, Pyrus sinkiangensis，Sophora japonica foliar dust particulates density were low.The two high content of PM2.5，PM10 were Elaeagnus angustifolia and Vitis vinefera，containing 0.62%，3.59% of foliar dust specifically.Fine dust particles of natural landing dust had smaller share of the volume fraction，while the fine dust particles of foliage dust had larger share of volume fraction.The middle value of foliar dust particle size followed the descending order，industrial area>transportation hub area>residential area>clear area；the middle value of natural landing dust particle size followed the descending order，clear area>transportation hub area>industrial area>residential area，and there was a visible difference between them.
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备注/Memo
第一作者简介：阿丽亚?拜都热拉（1986-），女，新疆托克逊人，博士，研究方向为荒漠化防治。E-mail：aliya_12@163.com. 责任作者：玉米提?哈力克（1966-），男，新疆阿克苏人，博士，教授，博士生导师，研究方向为荒漠河岸林生态修复。E-mail：halik@xju.edu.cn. 基金项目：国家自然科学基金资助项目（31270742）。