【摘要】 随着城市的快速发展,人们对搬迁化工类企业原厂地土壤中重金属污染日趋重视。本文利用经济作物取原污染场地土壤进行箱体种植,试验表明,山药植物地上部分吸收系数随土壤铅含量升高呈现先增大后减小的趋势,且在轻度污染农田中,修复效果最好;山药吸收的铅主要聚集在块根表皮,中轻度铅污染农田中种植的山药去皮后仍可食用;观察表明土壤铅污染程度对山药的生长影响不明显,说明山药对土壤铅有一定的耐受性,可以在铅污染农田种植。更多还原

【Abstract】 With the rapid development of cities, the problem on heavy metal contamination in original factory sites of the removed chemical enterprises has attracted more and more concern among residents. Our research conducts on a cabinet growing experiment based on the soil from the original factory lands. According to empirical work, we summarize three main conclusions: the partial absorption coefficient of Chinese yam initially increases then decreases with soil lead levels and the soil restoration effect performs best in lightly polluted lands planted with Chinese yam; the lead absorbed by yam mainly accumulates in the root epidermis which means peeled yam in the mild contaminated lands is still edible; soil lead contamination has few influence on the growth of the Chinese yam which means yam has certain tolerance on lead pollution. In brief, Chinese yam can be planted in lead-contaminated land for soil restoration.更多还原