Investigation on Pollution Resistance of Ornamental Trees in Guanzhong Region

In this paper,basing on growth and distribution of the existing landscape plants in Guanzhong heavy industry zone,we use air pollution tolerance index of Singh,the main physiological indicators and sulfur content in leaves,analysis of its anti-pollution ability of garden plants.The results showed:Rosa chinensis,Punica granatum and Ailanthus altissima species of SO2 absorption and the resistance are all better,so they can be planted in the contaminated area as the keynote planting trees;useing air pollution tolerance index of Singh evaluate resistantance of species,most of the trees are basically the same with investigation from contaminated areas.It indicated that Ailanthus altissima,Ilex chinensis,Cedrus deodara,Ginkgo biloba,Ligustrum lucidum,Sophora japonica were the best six species in pollution resistance.