重要平原綠化樹種香樟、水杉的生態(tài)凈化功能研究
[Abstract]:With the rapid development of urbanization, human activities inevitably have a certain impact on the urban environment. As an important part of urban green space system planning, the selection of greening tree species and the application of collocation mode not only have aesthetic principles, but also should be integrated into more ecological concepts. In this paper, the greening tree species of road and channel greenbelt in Tongxiang city are taken as the research object, and the common greening trees of Camphor camphora and Metasequoia in plain are compared and analyzed in this paper. The ecological purification function of these two species of trees was evaluated by studying the absorption of atmospheric pollutants (SO2,NOX, fluoride) and the ability of dust retention. The results showed that: (1) the accumulation ability of heavy metals and atmospheric pollutants of different tree species was different, and the accumulation ability of heavy metals and atmospheric pollutants was also different between the two species under different growing environment. The accumulation of Pb,Cd,Ni by Metasequoia glyptostrobus and Cinnamomum camphora in road green space was higher than that in river greenbelt. (2) the accumulation ability of Metasequoia glyptostrobus to Pb,Cd,Ni was stronger than that of Cinnamomum camphora. The accumulation ability of Cinnamomum camphora to SO2,NOX, fluoride was stronger than that of Metasequoia glyptostroboides. (3) the accumulation ability of heavy metals and atmospheric pollutants in different organs was different. The concentrations of heavy metals in organs of Metasequoia glyptostroboides were higher than those of camphora, and the concentrations of atmospheric pollutants in organs of Cinnamomum camphora were higher than those of Metasequoia glyptostroboides. The concentrations of Pb and Ni in the organs of Metasequoia glyptostrobus and Cinnamomum camphora were compared as follows: the trunk of tree root bark of branch leaves, the trunk of bark of leaves of Cd, and the concentration of three heavy metals in each organ of river greenbelt were tree root branches and bark trunks of leaves. The relationship between the concentration of three kinds of air pollutants in different organs of different tree species was as follows: (5) the dust retention ability of Cinnamomum camphora was stronger than that of Metasequoia glyptostroboides. The road green land is polluted seriously, and the camphor with strong dust retention ability is more suitable for planting on both sides of the road.
【學(xué)位授予單位】:浙江農(nóng)林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:X51;X173
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