[目的] 比较旱柳无性系的生长以及对水体中氮、磷去除效果, 以筛选出处理富营养化水体效果较好的无性系。[方法] 利用8个旱柳无性系在富营养化水体中进行静态培养试验, 研究各无性系的形态特征、叶绿素相对含量指数、对营养元素的吸收以及对废水中氮、磷的去除效率。[结果] 旱柳无性系在整个试验期间生长良好, 无死亡现象。各无性系最终生物量、苗高和相对生长率有显著差异, 其中, 旱59和旱97整体表现最好。旱柳无性系对富营养化水体中氮、磷吸收较好, 地上部分营养元素浓度较高。旱柳各无性系对总氮、氨氮和硝态氮的去除效率分别为87.17%96.94%、90.35%99.33%和66.66%88.19%, 对总磷的去除效率为76.59%83.15%, 无性系旱13总的去除效率最高。[结论] 参试8个旱柳无性系均能在富营养化水体中正常生长, 但各无性系在富营养化水体中的生长响应有较大差异。综合多个指标并结合长期野外试验观察, 旱13、旱59、旱97是适合修复富营养化水体的较好材料。

[Objective]A greenhouse pot experiment was conducted to evaluate the potential of Rhus chinensis Mill for phytoremediation of lead-contaminated soil.[Method]The response of container seedlings to Pb concentrations (0, 400 and 1 000 mg·kg-1) in the soil was studied. Seedling growth, chlorophyll, carotenoid, chlorophyll fluorescence, malondialdehyde (MDA), nutrient elements, Pb accumulation and translocation were assessed.[Result]The results showed that R. chinensis did not show visual symptoms of Pb toxicity. Compared to the control, the biomass increased slightly at low concentration (400 mg·kg-1). Under Pb stress conditions, the root elongation was restrained, while the radial growth of root was promoted and the fine root was developed better. No differences were observed in photosynthetic pigments, chlorophyll fluorescence, and MDA. During the experiment, only small quantity of Pb were uptake by R. chinensis, and most of the Pb absorbed by plants was retained in the roots. However, at the high concentration (1 000 mg·kg-1), R. chinensis transported metal to the shoots better, and the translocation factor (TF) value was 0.66. Under the Pb stress, oxalic acid of root exudates was increased significantly; while the root could be induced malic acid and citric acid, and the concentration increased with Pb concentration in soil. [Conclusion]R. chinensis was found to have Pb tolerance and phytoremediation potential in Pb-contaminated soils.