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中文摘要：
通过土培试验,研究了铅添加量为0,350,700 mg/kg条件下,19种花卉植物（矮牵牛、八宝景天、八仙花、百日草、彩叶草、茶花凤仙、大丽花、金边天竺葵、君子兰、孔雀草、美人蕉、射干、蜀葵、四季海棠、万寿菊、一串红、银边天竺葵、月季、紫茉莉）对铅的富集特征。结果表明：供试花卉植物在试验的铅胁迫水平下都具有较强的耐性,但其地上部干重随铅处理浓度的增加通常都有所降低;紫茉莉、蜀葵、四季海棠和茶花凤仙对铅的富集能力较强,在最高的铅处理条件（700 mg/kg）下,它们的地上部铅含量都〉100 mg/kg,并且地上部铅富集系数均显著高于其他花卉植物;紫茉莉、银边天竺葵、金边天竺葵、八宝景天的铅转移系数最高值≥0.45,并且它们在铅添加量为700 mg/kg时的转移系数均显著高于铅添加量为350 mg/kg时的转移系数。综合本研究结果可知,紫茉莉不仅对铅胁迫具有较强的耐性,而且具有较高的铅富集能力和转移能力,在铅污染土壤的修复方面具有较大的应用价值。
英文摘要：
The Pb enrichment characteristics of nineteen ornamental plants were studied under soil culture with the addition of 0, 350 and 700 mg/kg. Results showed that all the tested ornamental plants had the high Pb tolerance under the experimental Pb levels, while the dry weight in the shoots generally decreased with the increase of Pb concentrations. The contents and bioaccumulation coefficients of Pb were higher inthe shoots of Mirabilis jalapa. , Althaea rosea, Begonia semperflorens, and Impatiens balsamina than in the shoots of the other tested ornamental plants. The Pb contents in the shoots of the above four ornamen-tal plants were all above 100 mg/kg under 700 mg/kg. The highest translocation factor of Pb for Mirabilis jalapa. , Pelargonium hortorum Bailey., Pelargonium hortorum Bailey. var. , and Sedum spectabile Boreau reached above 0.45, and the translocation factor of theirs was higher under 700 mg/kg than under 350 mg/kg. In conclusion, Mirabilis jalapa, have both strong tolerance and great ability of enrichment and translocation under Pb stress, and thus have large potential to restore Pb-contaminated soils.
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