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南京雨花台区主要绿化树种滞尘能力与绿地花境建设
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摘要
雨花台区生态环境状况良好,森林大部分集中在秦淮新河以南地区,森林覆盖率较高,但颜色单调,各类绿地花量不足,花色不显著,而且布局不够合理,缺乏科学的整体规划。雨花台区交通区位优势明显,但由于道路的分隔和车辆产生的影响,为全区生态环境建设带来困扰。本文研究了南京雨花台区主要绿化树种滞尘能力及绿地花境建设,旨在为雨花台区绿化树种的选择及绿地花境建设提供理论依据。研究结果如下:
     1综合滞尘能力
     滞尘能力强的有红叶李Prunus cerasifera Ehrh f. atropurpurea Jacp、夹竹桃Nerium indicum Mill、狭叶十大功劳Maonia forunei、枫香Liquidambar styraciflua L.等;广玉兰Magnolia grandiflora Linn、鸡爪槭Acer palmatum Thunb、杨树Populus、刺槐Robinia pseudoacacia、樱花Cerasus serrulata、三角枫Acer buergerlanum、枫杨Pterocarya stenoptera C.DC.、桃树Prunus persica、二球悬铃木Platanus hispanica、银杏Ginkgo biloba等滞尘能力弱。
     2不同季节滞尘能力
     女贞Ligustrum、海桐Pittosporum tobira、珊瑚树Viburnum odoratissimum Ker-Gawl、金叶女贞Ligustrum Vicaryi、瓜子黄杨Euonymus japonicus、八角金盘Fatsia japonica、二球悬铃木Platanus hispanica、红叶李Prunus cerasifera Ehrh f. atropurpurea Jacp一年之中,夏季的滞尘量最低,春天和秋天的滞尘量相对较高,冬天达到滞尘量的最大值。
     金叶女贞的四季的滞尘量分别是0.3060mg/cm~2、0.0324mg/cm~2、0.9078mg/cm~2、103.8395mg/cm~2。冬季滞尘量较夏季显著增加。
     3 4种绿化树种累积滞尘能力
     4种树木(红叶李、香樟Cinnamonum camphora、大叶黄杨Euonymus japonicus Thunb.、银杏)的第1周(雨后)的滞尘量对其总滞尘量的贡献最大,红叶李第1周的滞尘量占3周总和的47.10%、香樟占51.48%、大叶黄杨占46.83%、银杏占65.36%等。累积滞尘能力:红叶李>银杏>大叶黄杨>香樟。
     4雨花区绿地花境建设布局结构模式
     充分考虑现有绿地布局,从生态效益和景观效益出发,以其绿地系统为载体,形成点线面相结合的绿化、美化、香化布局结构,筛选出多种植物作为绿地花境建设的材料,初步建成雨花台区花境系统的骨架,改善雨花台区生态环境,提高全区花量。
     具体的布局结构为:“一廊、二带、三片、若干点”。
     5绿地花境建设
     雨花区绿地花境建设规划可分为:附属绿地花境建设规划、防护绿地花境建设规划、道路防护绿地花境建设规划、工业防护绿地花境建设规划、生产绿地花境建设规划、河道防护绿地花境建设规划、其他绿地花境建设规划等七类。针对不同绿地化境建设现状,提出了相应的具体规划措施。
Ecological environment of Yuhautai area is in order, forest coverage is higher and centralize in the southof Qinhuan river. However, there are many problems of this area such as monotony of forest color, shortageof the flower's quantity, no-markedness of design and color, and the layout is not in enough. Predominance ofYuhautai area's traffic section is in evidence, but the influence of the compartmentation of the road andvehicle brought puzzle for the construction of whole area's ecological environment. Ability of the mostvirescence plants' dust blocking and flower borders' construction was researched in order to providetheoretical gist for the choice of greenbelt plants and the construction of the flower borders of Yuhautai area.The results were shown as follows:
     1 Ability of synthesis dust blocking
     The dust blocking's ability of Prunus cerasifera Ehrh f. atropurpurea Jacp, Nerium indicum Mill,Maonia forunei, Liquidambar styraciflua L was highest. Magnolia grandiflora Linn, Acer palmatum Thunb,Populus, Robinia pseudoacacia, Cerasus serrulata,Aeer buergerlanum, Pterocarya stenoptera C.DC, Prunuspersica, Platanus hispanica, Ginkgo biloba's ability of dust blocking was lowest.
     2 Ability of dust blocking in different seasons
     Eight trees' ability of dust blocking in different seasons was researched which was Ligustrum,Pittosporurn tobit, Viburnum odoratissimum Ker-Gawl, Ligustrum Vicaryi, Euonymus japonicus, Fatsiajaponica, Platanus hispanica, Prunus cerasifera Ehrh f. atropurpurea Jacp. The quantity of dust blockingwas maximum in winter, which was minimum in summer.
     The quantity dust blocking of Ligustrum Vicaryi in four seasons were 0.0324rag/cm~2, 0.3060mg/cm~2,0.9078mg/cm~2, 103.8395mg/cm~2. The quantity of dust blocking in winter was 3204 times of the spring.
     3 Four trees' ability of dust cumulation blocking
     The quantity of the four trees (Prunus cerasifera Ehrh f. atropurpurea Jacp, Ginkgo biloba,Cinnamonum camphora, Euonymus japonicus Thunb) was most in the first week after raining. Thepercentage of the four trees' quantity of dust blocking in the first week was 47.10%,51.48%,46.83%,65.36%in the whole of the three weeks. The Prunus cerasifera Ehrh f. atropurpurea Jacp's ability of dustcumulation blocking was highest, and that of Cinnamonum camphora was lowest.
     4 Mode of flower border's frame
     On the base of ecology and landscape benefits, the layout of greenbelt was thought over and theconjunction of dot and line's frame of vireseence, prettification, fragrance was formed. Many plants werescreened out as the material of flower border's construction.
     ldiographic frame was one corridor, two belts, three patches, some dots.
     5 Construction of greenbelt and flower borders
     The layout of Yuhuatai area's greenbelt and flower borders' construction was divided into seven kinds,appertain greenbelt and flower borders, fence greenbelt and flower borders, road fence greenbelt and flowerborders, industry fence greenbelt and flower borders, production fence greenbelt and flower borders,watercourse fence greenbelt and flower borders, others fence greenbelt and flower borders and so on. Inallusion to the actuality of different greenbelt and flower borders' construction, the corresponding layoutmeasure was brought out.
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