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林业资源管理 ›› 2018, Vol. 0 ›› Issue (5): 63-69.doi: 10.13466/j.cnki.lyzygl.2018.05.011

• 科学研究 • 上一篇    下一篇

8种乔木滞尘量与重金属含量的关系

林星宇(), 李海梅, 李彦华(), 刘志科   

  1. 青岛农业大学 园林与林学院,山东 青岛 266109
  • 收稿日期:2018-07-31 修回日期:2018-10-22 出版日期:2018-10-28 发布日期:2020-09-24
  • 通讯作者: 李彦华
  • 作者简介:林星宇(1991-),男,河北沧州人,在读硕士,研究方向为园林生态学。Email: 1126698527@qq.com
  • 基金资助:
    国家自然科学基金资助项目(31100512);青岛农业大学博士基金项目(6631116005);青岛农业大学2017年研究生创新立项项目(QYC201724);大学生创新立项(436)

Relationship between Dust Retention and Heavy Metal Content in 8 Tree Species

LIN Xingyu(), LI Haimei, LI Yanhua(), LIU Zhike   

  1. College of Landscape Architecture and Forestry,Qingdao Agriculture University,Qingdao,Shandong 266109,China
  • Received:2018-07-31 Revised:2018-10-22 Online:2018-10-28 Published:2020-09-24
  • Contact: LI Yanhua

摘要:

园林植物具有滞留大气颗粒物及吸收重金属的作用,对城市环境的改善具有重要意义。通过对8种乔木滞尘量以及滞尘量与重金属含量的关系研究得出:1)紫叶李、悬铃木和女贞单位叶面积滞尘量较大,栾树和绦柳单位叶面积滞尘量较小;紫叶李的单位叶面积滞尘量最大,平均达到(4.4949±0.7274)g/m2,是最小绦柳的2.8倍左右。2)8 种乔木在21~27d达到最大滞尘量。饱和滞尘量最高的为紫叶李,在雨后 24 d 达到最大滞尘量,为(7.2018±0.0264)g/m2;绦柳最低,在21d达到最大滞尘量,为(2.8053±0.0493)g/m2。前者是后者的2.5倍左右。3)植物叶片中重金属含量与滞尘量、叶片中重金属含量与叶面尘中重金属含量、叶面尘重金属含量与滞尘量之间均表现出正相关关系。叶片中的Cd,Pb 与滞尘量的相关系数较高,达到极显著相关水平;叶片中的Cu,Ni,Pb,Zn与叶面尘中相应重金属的相关系数均达到0.8以上,达到极显著相关水平;叶面尘中重金属含量与滞尘量之间相关系数均达到0.4以上,尤其Pb 与滞尘量的相关系数最高,相关系数为0.880。

关键词: 乔木, 滞尘量, 叶片重金属含量, 叶面尘重金属含量, 相关性

Abstract:

Garden plants have the function of entrainment of atmospheric particulates and heavy metals,which can significantly improve the urban environment.The dust retentions on the leaf surfaces of Ligustrum lucidum,Platanus orientalis and Populus tomentosa were larger than that of Salix matsudana and Koelreuteria paniculata,and the dust retention amount per leaf surface of Ligustrum lucidum was the largest at an average level of 4.494 9±0.727 4g/m2,which was about 2.8 times as that of the smallest Salix matsudana .The dust retention of the 8 studied tree species reached the maximum during day 21 to day 27.The highest saturated dust retention was Ligustrum lucidum on the 24th day after raining with an amount of 7.201 8±0.026 4g/m2 while the lowest,Salix matsudana,of 2.805 3±0.049 3g/m 2 on day 21.The former was about 2.5 times as much as that of the latter.There was a positive correlation between the heavy metal content in leaves and the leaf dust retention,as well as between the heavy metal content in leaves and in the retentive dust,heavy metal content in the retention dust and the retention dust amount.The correlation of Cd,Pb content in leaves and dust retention reached a very significant level.The correlation coefficient between Cu,Ni,Pb and Zn content in leaves and in the retention dust reached more than 0.8,reaching a very significant level.The correlation coefficient between heavy metal content in the retentive dust and leaf dust retention is above 0.4,especially the highest correlation between Pb and dust retention with a coefficient 0.880.

Key words: trees, maximum dust retention, heavy metal content, leaf, heavy metal content in retention dust correlation

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