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| Dust Retention Capacities of Urban Trees and the Influencing Factors in Aksu, Xinjiang, China |
| Aliya Baidourela1, Umut Halik1,2, Tayierjiang Aishan1,2, Abdulla Abliz1,2, Martin Welp3 |
1. College of Resources & Environmental Science/Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi 830046, China;
2. Faculty of Mathematics and Geography, Catholic University of Eichstaett-Ingolstadt, Eichstaett 85071, Germany;
3. Faculty of Forest and Environment, Eberswalde University for Sustainable Development, Eberswalde 16255, Germany |
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Abstract Urban trees in arid land oasis cities have been playing very important purification role in capturing dust particles, reducing airborne pollutant concentrations and improving of urban ecological environment. In this paper, dust retention capacities of Platanus acerifolia (Ait.), Populus alba var. pyramidalis Bunge, Ulmus densa Litw., Fraxinus sogdiana Bunge at different functional areas of typical oasis city Aksu in Southern Xinjiang were examined under different weather conditions. Human factors, natural factors and tree's own factors which mainly determine the dust retention capacity of urban greening trees were quantitatively analyzed. The results showed that P. acerifolia (Ait.) performed strongest dust retention capacity (5.54 g·m-2) for the same functional area, followed by P. alba var. pyramidalis Bunge (2.93 g·m-2), U. densa Litw. (2.50 g·m-2), F. sogdiana Bunge. (1.36 g·m-2). For the different functional areas, urban trees in Cement Factory demonstrated highest dust retention capacities, followed by residential areas, parking areas, traffic areas, industrial areas, suburban shelterbelt areas. Among the three influencing factors, human factors was the greatest in contributing dust accumulation on tree leaves, contribution rate was 0.89, tree's own factors was the weakest, contribution rate was -0.13. This indicated that human-induced secondary dust pollution should be focused on dust prevention measurements.
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Received: 11 December 2013
Published: 20 March 2015
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2015, Vol. 35 
