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《Journal of Soil and Water Conservation》 2016-04
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Effect of Forest Tree Species on Wet Deposition of Atmospheric Particles

CHEN Jungang;YU Xinxiao;BI Huaxing;FU Yanlin;Beijing Laboratory of Urban and Rural Ecological Environment,College of Soil and Water Conservation,Beijing Forestry University;College of Forestry,Beijing Forestry University;  
Typical forest tree species Platycladus orientalis and Quercus variabilis were chosen as the main research objects,and monitoring devices were set up at different canopy heights(8m,6m,4m,and 2m)of2different tree species for location monitoring.The wet deposition effect of tree species on atmospheric particulates was analyzed by the comparison of dust detention per unit leaf area and the sour rate of rainfall of2 tree species.The wet deposition of particulates at different canopy height and the variation law of wet deposition flux of size-fractionated particulate matters were also analyzed,and the reason of the differences in dust-retention capacity of different tree species was explored by leaf microscopic structure analysis.The results showed that:(1)The dust detention per unit leaf area of Platycladus orientalis was higher than that of Quercus variabilis,while the sour proportion of rainfall of Quercus variabilis was higher than that of Platycladus orientalis.(2)The lowest wet deposition flux of particulates and the strongest retention capacity of Platycladus orientalis occurred at 2 m under branch height,while those of Quercus variabilis were observed at the height of 4min the middle of canopy.(3)The canopy bottom of Platycladus orientalis and the upper canopy of Quercus variabilis had the significant retaining effect on the range of 10μm to 100μm particulates.The retention capacity of Platycladus orientalis was better than that of Quercus variabilis for 0.4to 3μm and 3to 10μm particulates.(4)The difference in the leaf microscopic structure of the 2different tree species caused different dust detention capacity.Platycladus orientalis has more wrinkles,stomata with higher opening and density,and relatively deeper grooves,which increased the particulate absorption capacity of this tree species.
【Fund】: 产学研联合培养研究生基地项目(BLCXY201617);; 林业公益性行业科研项目“森林对PM2.5等颗粒物的调控功能与技术研究”(201304301);; 北京市共建项目专项
【CateGory Index】: S718.45;X16
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