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基于干沉降模型的北京平原区造林削减PM2.5效应评估

陈龙,刘春兰**,潘涛,陈操操,李铮,王海华,裴厦,孙莉   

  1. (北京市环境保护科学研究院, 国家城市环境污染控制工程技术研究中心, 北京 100037)
  • 出版日期:2014-11-10 发布日期:2014-11-10

Assessment of the effect of PM2.5 reduction by plain afforestation project in Beijing based on dry deposition model.

CHEN Long, LIU Chun-lan**, PAN Tao, CHEN Cao-cao, LI Zheng, WANG Hai-hua, PEI Sha, SUN Li   

  1. (Beijing Municipal Research Institute of Environmental Protection, National Urban Environmental Pollution Control Engineering Research Center, Beijing 100037, China)
  • Online:2014-11-10 Published:2014-11-10

摘要:

本文基于干沉降模型对北京市平原区造林削减PM2.5效应进行了评估。结果表明:2012年所造森林PM2.5年削减量可达451 t,其中,阔叶林削减量占57%;不同季节的削减量有较大差别,春季的削减量占全年的50%;造林工程可使造林区PM2.5浓度平均下降0.57 μg·m-3,完成《北京市2013—2017年清洁空气行动计划》目标的2%;平原区造林对于减缓和控制PM2.5、改善城市大气环境质量具有一定作用,在目前治理PM2.5有效方法不多的状况下,应当继续开展平原区造林。

 

关键词: 缺铁, 硝普钠, 抗氧化酶, 番茄幼苗, 硝酸盐胁迫, 养分吸收

Abstract:

Based on a dry deposition model, we evaluated the PM2.5 particles reduction effect of plain afforestation project in Beijing. The results showed that 451 t PM2.5 particles had been reduced by the trees planted in Beijing plain areas in 2012. Among these trees, broadleaf forest contributed 57% of the total reduction. The reduction effect was variable in different seasons, with 50% of reduction happening in spring. The plain afforestation project had made the annual average PM2.5 concentration in the afforestation area decreased by 0.57 μg·m-3 that has achieved 2% of the target from “Beijing Clean Air Action Plan (2013-2017)”. The plain afforestation has played an important role in the urban pollution management. Considering that there is no effective way to control the PM2.5 pollution, we recommend continuing carrying out the plain afforestation project in appropriate circumstances.
 

Key words: iron deficiency, sodium nitroprusside, nutrients uptake, antioxidant enzyme, NO3- stress, tomato seedlings