不同土地利用方式对城市土壤质量的影响

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Abstract

320 topsoil samples(0~10cm)were collected from five different land-use sites(i.e.industrial areas,roadsides,agricultural areas,residential areas and parks)in Xigu District of Lanzhou city,northwest China.Physical-chemical properties and contents of Pb、Zn、Cu、Cd and Hg in these samples were analyzed to examine the effects of the different land-use types on quality of urban soils.The results showed that(1)soil samples from the industrial areas had the lowest pH but the highest electric conductivity among the five sites;(2)the contents of organic carbon in the roadside soil samples were significantly higher than those in the agricultural,residential and park soils;(3)the contents of Pb,Zn,Cu,Cd and Hg varied significantly between the five sites but were consistently higher than the background values of local soils;and(4)the calculated Nemerow integrated pollution indices were 4.9,3.7,4.0,2.4 and 2.2 for the industrial areas,roadsides,agricultural areas,residential areas and parks,respectively.This study suggests the differential effects of the five different land-use types on the physical-chemical properties and accumulation of heavy metals in urban soils,with the strongest influence by industrial activities,followed by traffic activities,agricultural activities and inhabitant living activities.

Key words： Urban soils Land-use types Physical-chemical properties Heavy metal accumulation Overall evaluation of pollution

Received: 25 February 2006

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	Articles by authors
	KANG Ling-fen
	LI Feng-rui
	HUA Wei
	TAN Jian-an
	YANG Fa-wang
	HEI Wen-long

Cite this article:

KANG Ling-fen,LI Feng-rui,HUA Wei, et al. The effects of different land-use types on quality of urban soils[J]. , 2006, 25(1): 59-63.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2006/V25/I1/59

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