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Dust-retention effect of ornamental green land in urban industrial area: A case study in Wuhan Iron and Steel Company workshop area.

CHEN Fang~1,ZHOU Zhixiang~1,GUO Erxiang~2,YE Zhenqing~2 (~1Huazhong Agricultural University,Wuhan 430070,China;~2Wuhan Iron and Steel Company,Wuhan 430083,China)  
Dust-retention effect is an important ecological function of urban ornamental green land.Combining the investigation and GIS of the green land system in Wuhan Iron and Steel Company workshop area,this paper determined the dust-retention ability of different plant kinds and synusia types in this system,and quantitatively analyzed its dust-retention effect.The results showed that different ornamental plants had a greater difference in their dust-retention ability,which was mainly related to their leaf surface character,tree crown structure,and branch intensive degree.The dust-retention ability of different synusia types was in order of deciduous broad-leaved shrubevergreen broad-leaved shrubhedgeevergreen broad-leaved arbordeciduous broad-leaved arborconifer arborgrass.The dust-retention amount of the ornamental green land in Wuhan lron and Steel Company workshop area was 9.51 t per day and 3 089.98 t per year,and the annual dust-retention amount of evergreen broad-leaved arbor was the highest,up to 991.68 t,while that of deciduous broad-leaved shrub was the minimum,only 0.0181 t.It could be concluded that the effective way to improve the dust-retention effect of ornamental green land was to choose the ornamental plants with strong dust-retention ability,and to dispose the arbor,shrub and herb layer rationally to increase vegetation quantity.
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