The content of Cr, Cd, Pb, Zn, Cu and Hg in apple orchard soil in Tianshui City was determined and their distribution law was analyzed in our paper. The results showed that the apple orchard soil in Tianshui City was not polluted by Hg,Pb and Cd, while Zn content was beyond soil background value; the variation coefficient of Cd, Hg, Cu and Pb was higher,while Cu and Cr had lower variation coefficient,and it revealed that there was great difference of (Cd, Hg. Cu and Pb pollution in different sampling points;there was significant correlation among Hg, Cu and Pb, and the correlation coefficient of Cu and Pb was highest (0.764 7);the maximum value of heavy metal content occurred most frequently in Qin'an County, while the occurrence frequency of minimum value was highest in Qinzhou District and Maiji District.%测定甘肃天水市苹果园土壤中铬(Cr)、镉(Cd)、铅(Pb)、锌(Zn)、铜(Cu)和汞(Hg)的含量,并分析了其分布规律.结果表明,天水市苹果园土壤未遭受Hg、Pb、Cd的污染,而Zn含量已超过土壤背景值;Cd、Hg、Cu和Pb的变异系数较大,而Cu和Cr的变异系数较小,说明不同样点Cd、Hg、Cu和Pb的污染差异较大;Hg、Cu、Pb之间具有显著的相关性,其中Cu和Pb的相关系数最大(0.764 7);秦安县出现重金属舍量最大值的几率最高,而秦州区和麦积区出现最小值的几率最高.
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