Effects of the different structure of urban green belts on the air quality

ZHU Chunyang, JI Peng, LI Shuhua

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2013, Vol. 37 ›› Issue (01) : 18-24.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2013, Vol. 37 ›› Issue (01) : 18-24. DOI: 10.3969/j.issn.1000-2006.2013.01.003

Effects of the different structure of urban green belts on the air quality

  • ZHU Chunyang1, JI Peng2, LI Shuhua3*
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Abstract

Taking four green belts with different internal constitution and five green belts with different canopy density along the west fourth ring road of Beijing as test objects, and using small-scale quantitative measurement method, this paper studied the effects of the different structure of urban green belts on the air quality in Beijing to provide scientific basis for the construction of urban green belts. The air anion concentration and bacteria rate were measured every two hours from 8: 00 to 18: 00 every day for continuous seven days. The results showed:(1)The green belts with internal constitution of tree-shrub-herbage and tree-herbage had a significant effect on the increase of air anion concentration and had a significant effect on the decrease of bacteria rate with internal constitution of tree-herbage(width 42 m, p<0.05).(2)When the canopy density reached 0.44, green belts had a significant effect on the increase of air anion concentration and an obvious effect on the decrease of bacteria rate(p<0.05), and when the canopy density exceeded 0.67, the effect was obvious and stable(width 42 m).

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ZHU Chunyang, JI Peng, LI Shuhua. Effects of the different structure of urban green belts on the air quality[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2013, 37(01): 18-24 https://doi.org/10.3969/j.issn.1000-2006.2013.01.003

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