Vol. 5, Issue 1 (2018)
Assessment of air pollution tolerance index and anticipated performance index of common roadsides trees
Author(s): Aminullah Yousafzai, Asmatullah Durani, Hashmatullah Durrani
Abstract: Enhanced intensity of pollution in modern society has become a serious and aggravating global issue; thus air pollution is ranked in the top 10 causes of death in the world. Besides others technical solutions to abate air pollution, vegetation is increasingly recognized as an alternative ameliorative method by removing pollutants mainly through deposition, absorption, adsorption, and accumulation process, moreover they can clean air naturally by releasing oxygen to the atmosphere. In this study, seven common trees species in three different areas based on air quality status of Chiang Mai city were selected for evaluating air pollution tolerance index (APTI) by analyzing four important biochemical parameters, which are (ascorbic acid content, total chlorophyll content, leaf extract pH, and leaf relative water content). The anticipated performance index (API) of these trees species are calculated as well by considering their APTI value together with other socio-economic and morphological characteristics. The results of the API index revealed an order of tolerance to be Mangifera indica L. (93.75%) as the best performer, Butea monosperma (Lam.) Taub. (87.5%), and Ficus religiosa L. (87.5%) were proved to be excellent performers, whereas Lagestroemia speciosa (L.) Pers. (62.5 %), Alstonia scholaris (L.) R.Br. (62.5%), and Polyalthia longifolia sonn. (62.5%) were recognized as good, and lastly, Plumeria rubra L. (50 %) was suggested as poor species for urban plantation.