辽宁滨海公路净化空气绿化植物计量研究

Quantitative Study on Greening Plants for Cleaning the Air in Coastal Highway in Liaoning

CO、NOx和PM10 3种物质均会发生干沉降现象,当下垫面为植被时不可逆转地被植物吸滞。利用污染物通量能够反映地面植物净化能力的方法,首先对辽宁滨海公路空气污染现状进行调查,推算污染物总量,然后利用干沉降模型预测净化等量污染物所需植物总量,最后总结出一般道路绿化净化空气植物计量数学模型。结果表明,滨海公路单公里路段净化空气所需林带总宽度为250m,所需植物至少5万株(平均木胸径15cm,品字形栽植)。该模型能为滨海公路全线绿化提供参考,也可为以净化空气为目的的道路绿化提供理论依据。

Carbon monoxide（CO）,nitrogen dioxide（NO2）and particulate matter less than 10 microns（PM10）will bring about dry deposition phenomenon.They will be absorbed and detained irrevocably when aplant community vegetated on the ground.Pollutant flux can reflect purification ability of plants on the ground.Firstly,the air quality pollution status along the coastal highway in Liaoning was investigated and its total pollutants were calculated.Secondly,the volumes of plants that were needed in purifying equal amount of pollutants were calculated by dry deposition model.Finally,the mathematical model for calculating greening plants used in purifying the air in road was concluded.The results showed that 250m wide tree belt and at least 50 000trees were needed for purifying the air per km in coastal highway（average tree DBH was 15cm,triangular planting）.The model developed could provide reference for the road greening in all part of coastal highway.