CAJ | 학술논문

本研究通过采样，对拉萨市城郊纳金乡、蔡公堂乡、夺底乡和羊达乡农田土壤所含重金属元素铜（Cu）、锌（Zn）、铅（Pb）、铬(Cr)、钴（Co）含量进行测量。利用单因子污染指数法和内梅罗综合污染指数法，并结合拉萨市土壤pH背景值及《中国土壤环境质量标准》（GB15618-1995）进行重金属污染评估。结论：①拉萨市城郊农田土壤除蔡公堂乡外，夺底乡、羊达乡和纳金乡均受到重金属铅、锌的轻度污染，铬元素维持在稳定的低水平。②除纳金乡外，其余各乡农田土壤钴含量超出全国平均水平，夺底乡已超出全国平均水平3倍多，纳金乡已接近全国平均水平。③拉萨市城郊农田土壤中重金属含量总体情况是：夺底乡＞羊达乡＞纳金乡＞蔡公堂乡。
본연구통과채양，대랍살시성교납금향、채공당향、탈저향화양체향농전토양소함중금속원소동（Cu）、자（Zn）、연（Pb）、락(Cr)、고（Co）함량진행측량。이용단인자오염지수법화내매라종합오염지수법，병결합랍살시토양pH배경치급《중국토양배경질량표준》（GB15618-1995）진행중금속오염평고。결론：①랍살시성교농전토양제채공당향외，탈저향、양체향화납금향균수도중금속연、자적경도오염，락원소유지재은정적저수평。②제납금향외，기여각향농전토양고함량초출전국평균수평，탈저향이초출전국평균수평3배다，납금향이접근전국평균수평。③랍살시성교농전토양중중금속함량총체정황시：탈저향＞양체향＞납금향＞채공당향。
In the current paper, the contents heavy metals (Cu, Zn, Pb, Cr, Co) in the suburban farmland soil col?lected from Najin, Caigongtang, Duodi and Duodi in the outskirt of Lhasa City were measured. The heavy metal pollution in the farmland soil was evaluated by using single factor pollution index and Nemero comprehensive pollution index method combining with the background of pH value in the soil in Lhasa and“China's soil envi?ronmental quality standards ”(GB15618- 1995). The results showed that the suburban farmland soil in Lhasa have lightly been polluted by lead and zinc except Caigongtang, and the content of chromium is maintained at a stable low level;in addition to Najin township, cobalt content in the farmland soil of the other villages was ex?ceeded national average and cobalt content in the farmland soil samples collected from Duodi township has been exceeded more than three times that of the national average. the overall situation of heavy metal content in the farmland soil in Lhasa was Duodi>Duodi>Najin>Caigongtang.