EVALUATION OF AIR POLLUTION TOLERANT TREES GROWING IN SOLAN CITY OF HIMACHAL PRADESH

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dc.contributor.advisorBHARDWAJ, S.K.
dc.contributor.authorSHARMA, AKANKSHA
dc.date.accessioned2017-05-08T10:36:44Z
dc.date.available2017-05-08T10:36:44Z
dc.date.issued2014
dc.description.abstractABSTRACT The present investigation entitled “Evaluation of air pollution tolerant trees growing in Solan city of Himachal Pradesh” was conducted during 2013-2014 in Solan city of Himachal Pradesh. In order to study the vegetation distribution as well as to select the site survey of the city was conducted. Based on the survey five sites were selected as: i) control ii) residential iii) traffic iv) industrial v) periurban. In order to select non – polluted site as a control, the nearby forest / agriculture field areas surrounding the city, where in relatively less development activity has taken place. Three tree species namely: Ficus palmata, Pistacia integerrima and Polpulus deltoides of uniform age, size, spread and common in occurrence in all the five sites in the city were selected for the study. In order to study tolerance and sensitivity of trees to air pollution, Air Pollution Tolerance Index (APTI) was computed based on physiological and biochemical parameters (ascorbic acid, chlorophyll, pH and relative water content). Dust accumulation on the leaves was recorded during rainy, winter and summer season. The leaf dust load was also analyzed for heavy metal content. In total there were 45 treatment combinations which were replicated four times in Randomised Block Design (Factorial). The APTI of selected trees ranged from 9.45- 13.49. T he order of tolerance of selected tree species was Ficus palmata (12.31) > Populus deltoides(11.76) > Pistacia integerrima (10.45) . The highest APTI was noticed in rainy followed by winter and summer season. The trend of APTI for tees growing at different sites was traffic >industrial > residential >peri - urban > control. The relatively higher APTI value of Ficus palmta as compared to other species indicated its tolerance to pollution in Solan city. The dust accumulation on the leaves of selected tree species growing at different sites in Solan city was found maximum 0.041 g m -2 in Ficus palmata and minimum 0.005 g m -2 in Populus deltoides, which followed the order of Ficus palmata> Pistacia integerrima>Polpulus deltoides and season wise maximum in winter followed by summer and minimum in rainy season. Trees grown at traffic area accumulated higher dust on their leaves as compared to control area (non-polluted). The dust load of all the species growing at different sites in Solan city contained significan t concentration of heavy metals like Cd (0.132 – 1.862) , Hg (0.007 - 7.216) , Pb (2.903 - 9.231) , Zn (0.783 - 3.708) , Ni(20.50 - 99.19) and Mn(12.06 - 16.32) . The concentration of Cd (1.862 mg kg - 1 ) and Hg (7.216 mg kg - 1 ) in leaf dust load of selected tree species was above the normal permissible limit prescribed for soil .en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810010768
dc.keywordsair pollution tolerant trees ,Solan city of Himachal Pradeshen_US
dc.language.isoenen_US
dc.publisherUHF,NAUNIen_US
dc.subEnvironmental Scienceen_US
dc.subjectnullen_US
dc.themeair pollution tolerant trees ,Solan city of Himachal Pradeshen_US
dc.these.typeM.Scen_US
dc.titleEVALUATION OF AIR POLLUTION TOLERANT TREES GROWING IN SOLAN CITY OF HIMACHAL PRADESHen_US
dc.typeThesisen_US
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