苏州市骨干树种的滞尘能力

Dust Absorption of Dominant Tree Species in Suzhou

为苏州城市绿地建设的植物选择及净化环境提供参考,于2017年9—12月对苏州市朴树、重阳木和黄山栾树等20种骨干树种,按上、中、下各部位均匀采集叶片,研究其滞尘能力。结果表明:不同树种间的滞尘能力差异明显,乔木树种的滞尘能力为朴树>重阳木>黄山栾树>无患子>鹅掌楸>紫叶李>杜英>珊瑚树>榉树>榆树>二乔玉兰>樱花>榔榆;灌木树种为八角金盘>熊掌木>洒金桃叶珊瑚>海桐;藤本植物为爬山虎>常春藤>美国凌霄;不同树种的滞尘量随着季节的变化而不同,空气质量越差植物的滞尘量越大;相同树种在不同生长环境的滞尘量也有明显差异,车流量较大地方植物的滞尘作用越明显。

The dust absorption capacity of upper, middle and bottom leaves of 20 dominant tree species was determined during September-December in 2017 to provide a reference for plant selection and environment purification in urban green land construction in Suzhou. Result： There is a significant difference in dust absorption capacity among twenty dominant tree species. The dust absorption capacity of arbor species is Celtis sinensis〉Bischofia trifoliata〉Koelreuteria bipinnata〉Sapindus mukonossi〉Liriodendrom chinense〉Prunus maackii〉Elaeocarpus decipiens〉Viburnum awabuki〉Zelkova serrata〉 Ulmus pumila〉Magnolia soulangeana〉Pyrus ussuriensis〉Ulmus paruifolia. The dust absorption capacity of shrub species is （Fatsia japonica〉Fatshedera lizei〉Aucuba japonica Variegata〉Pittosporum tobira）. The dust absorption capacity of vine species is （Parthenocissus tricuspidata〉Hedera nepalensis〉Campsis radicans）. The dust absorption amount of different tree species is different with seasonal variation. The poorer the air quality is, the more the dust absorption amount of tree species is. There is an obvious difference in dust absorption amount of the same tree species among different growth environments and the heavier the traffic flow is, the higher the dust absorption effect of tree species is.