华南农业大学学报2024，Vol.45Issue(3)：336-343,8.DOI:10.7671/j.issn.1001-411X.202305032
水体镉铅铜复合污染对玉蕊生长及元素吸收的影响
Effect of combined pollution of Cd,Pb and Cu on growth and element absorption of Barringtonia racemosa
摘要
Abstract
[Objective]To explore the effects of Cd-Pb-Cu combined heavy metal pollution on the growth and element absorption of Barringtonia racemosa,and provide a theoretical basis for the application of B.racemosa in the remediation of heavy metal combined pollution wetland.[Method]The effects of Cd-Pb-Cu compound pollution on the growth,nutrient uptake,and heavy metal uptake and distribution of B.racemosa were investigated by an indoor pot experiment which simulated wetland environment.[Result]The plant height was significantly inhibited under 20 mg·L-1 Cd + 200 mg·L-1 Pb + 400 mg·L-1 Cu,decreasing by 14.20%compared with CK(no pollution),while the growth of ground diameter was not affected under all pollution treatments.Comparing with CK,the total biomass of B.racemosa increased significantly under 5 mg·L-1 Cd + 100 mg·L-1 Cu + 50 mg·L-1 Pb.The contents of N,P and K were not significantly different from CK under all pollution treatments,however,the accumulation of all three nutrient elements in whole plant were significantly higher than that of CK.The contents and accumulations of Cd,Pb,Cu in whole plant were improved under Cd-Pb-Cu compound pollution conditions.With the increase of pollution concentration,the contents and accumulations of Cd,Pb,Cu all showed a trend of increasing first and then decreasing.The correlation analysis showed that K and Cu had more pronounced effects on plant growth and environmental adaptability of B.racemosa than other elements.The integrated transfer coefficient and cluster analysis showed that B.racemosa demonstrated stronger enrichment and transfer ability for heavy metals under 10 mg·L-1 Cd + 100 mg·L-1 Pb + 200 mg·L-1 Cu.[Conclusion]B.racemosa has strong adaptability and restoration ability to Cd-Pb-Cu compound pollution water,which can be used for ecological restoration of Cd,Pb,Cu polluted wetlands.关键词
重金属/复合污染/玉蕊/元素吸收/湿地/生态修复Key words
Heavy metal/Combined pollution/Barringtonia racemosa/Element absorption/Wetland/Ecological restoration分类
农业科技引用本文复制引用
彭远航,朱洁怡,陆洁,阮可瑾,冯嘉仪,黎炜彬,刘颂颂,曾曙才..水体镉铅铜复合污染对玉蕊生长及元素吸收的影响[J].华南农业大学学报,2024,45(3):336-343,8.基金项目
广东省林业科技创新项目(2019KJCX035) （2019KJCX035）
国家自然科学基金(31971629) （31971629）
