兰州市是以石油、化工、冶炼、制造、毛纺及电子制造业为主的综合型工业城市。随着改革开放的深入,工业和乡镇企业发展迅速,工业“三废”物质排放量也逐年增多。这不仅严重影响了环境质量,也影响了农作物的产品质量。我们通过对纳污灌溉区粮食、蔬菜、瓜果等主要农作物中有害重金属等元素的采样分析,明确了目前兰州市主要农作物中重金属等 Lanzhou is an integrated industrial city dominated by petroleum, chemical industry, smelting, manufacturing, wool spinning and electronics manufacturing. With the deepening of reform and opening up, the industrial and township and village enterprises have been developing rapidly, and the emission of industrial wastes has also increased year by year. This not only seriously affects the quality of the environment, but also affects the quality of crops. By sampling and analyzing the harmful heavy metals and other elements in the main crops such as grain, vegetables and fruits in the sewage-contaminated irrigation area, we have made clear that the present heavy metals in the main crops in Lanzhou