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中文摘要：
乌鲁木齐城市土壤中Cr、Cu、PB、Zn含量很高,超出相应土壤背景值1.65-2.84倍,Mn、Fe含量与背景值差别不大.除Mn、Fe以外,其他重金属空间分布差异都很大,Cr、Pb含量较高区域沿西北-东南走向交通干线分布,主要的影响因素可能是交通运输、工业布局和风向;Cu、Zn含量较高区域主要分布在北部,工业布局可能是主要的影响因素;中部商业区内Cu、Pb、Zn含量也较高,交通流量大、人类活动强度大、植被覆盖率低可能是主要影响因素.乌市城市土壤重金属主要有三个来源：工业生产污染源、原土壤母质、交通运输污染源.
英文摘要：
The paper was focused on the urban area of Urumqi and analyzed the contents, distribution and influence mechanisms of the heavy metals in urban soils. Heavy mentals of chromium, copper, plumbum, zinc, manganese and iron were mainly studied. The experiments were carried out by means of atomic absorption flame spectro- photometry, and HNO3 - HF - HCIO4 was used for pre-treatment of samples. The following conclusions can be drawn that Cr,Cu,Pb and Zn have higher contents which have gone beyond background value by 1.65 -2.84 times except for Mn and Fe. Spatial distribution of Cr,Cu,Zn and Pb has obvious character except for Mn and Fe. Cr,Pb of higher contents are distributed along the main northwest - southeast traffic line. This kind of distribution is related with heavy traffic, industry distribution, wind direction and landform; Cu ,Zn of higher contents are distributed in north area of the city and industry distribution may be the main reason; there are Cu,Pb and Zn of higher contents in central downtown district because of heavy traffic, high strength activity coming from human being, less cover of vegetation. Industrial pollution, parent soil materials loading and transport pollution were the main sources of the heavy metals in soils in Urumqi.
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