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以清洁区为对照,分析了昆明市工业区和主城区使用频率较高的典型树种滞尘效果,对不同功能区植物的滞尘量做差异性分析。结果表明,植物叶片的滞尘量高低排序是工业区、主城区、清洁区。通过对植株不同高度的滞尘量比较,发现低位置的植物叶片滞尘效果较好;在阔叶树种中,天竺桂(Cinnamomum pedunculatum Nees)的滞尘效果最好,可达到19.660 9 g/m2,而梧桐[Firmiana platanifolia(L.f.)Marsili]是对SO2吸收能力最强的植物;在针叶树种中,龙柏[Sabina chinensis(L.)Ant.var.chinensis cv.Kaizuca]和圆柏[S.chinensis(L.)Ant.Cupress.Gatt.]的滞尘效果较好,柳杉(Cryptomeria fortunei Hooibrenk ex Otto et Dietr.)对SO2和NOx的吸收净化能力较强。因此,综合考虑大气污染因素后,在不同功能区除应种植常绿阔叶树种以及落叶阔叶树种以外,还应考虑搭配以龙柏为首选的针叶树种,形成一个针叶树种和阔叶树种混交的合理群落结构。
Taking the clean area as a control, the effect of dust removal of the typical tree species with high frequency in Kunming industrial zone and the main urban area was analyzed, and the dust-holding capacity in different functional areas was analyzed. The results showed that the order of the dust accumulation in plant leaves was industrial area, main urban area and clean area. By comparing the dust-holding capacity at different heights of plants, it was found that the dust-holding effect of plant leaves in the lower position was better. Among the broad-leaved species, Cinnamomum pedunculatum Nees had the best dust-holding efficiency of 19.660 9 g / m2, However, Firmiana platanifolia (Lf) Marsili is the strongest absorbent for SO2. In coniferous species, Sabina chinensis (L.) Ant.var.chinensis cv. Kaizuca and S. chinensis (L.) Ant.Cupress.Gatt.] Had better dedusting effect, and Cryptomeria fortunei Hooibrenk ex Otto et Dietr. Was able to purify SO2 and NOx more effectively. Therefore, considering the air pollution factors, in addition to planting evergreen broad-leaved species and deciduous broad-leaved species in different functional areas, we should also consider the coniferous species with coniferous cypress as the preferred choice to form a reasonable mixed coniferous and broad-leaved species community structure.