Reaction of planting tree species on Chlorine pollution in the atmosphere

In order to reduce air pollutants, it is very important to choose urban planting tree species according to the reaction modes of plants on the air pollution. Through observing damage symptoms of leaves of planting trees in the polluted areas, we estimated resistant degrees of plants to chlorine-dominant pollutants. We classified resistant levels of plants according to their reaction characteristics on their pollutants. As a result, we screened out resistant and sensitive monitoring plant species. The result can be applied to the selection of resistant plant species for planting. It shows that the resistant species include: Fraxinus rhynchophylla, Morus alba, Gleditsia japonica, Salix matsudana, Tamarix chinensis, Lonicera japonica, Lycium chinense, Ligustrum obtusifolium, Amorpha fruticosa, Elaeagnus angustifolia, Securinega suffruticosa, Euonymus alatus, Robinia pseudoacacia, Prunus davidiana, Hibiscus syriacus,Ulmus pumila, Zizyphus jujuba, Ailanthus altissima. And the followings are some sensitive monitoring species: Pinus tabulaeformis, Weigela florida, Prunus triloba, Tilia mandshurica, Prunus armeniaca var. ansu, Forsythia suspense, Acer saccharum, Picea koraiensis ,Sabina chinensis, Betula platyphylla