摘要
长江口滨岸潮滩芦苇与海三棱草根系、茎叶以及根际沉积物中Cu、Pb、Mn、Zn、Cr的含量分析发现,Cu、Pb、Zn、Cr在根系中的含量较高,而Mn在茎叶中的含量达到总量的55%以上。海三棱草比芦苇能更有效地累积重金属,两种植物根系 沉积物系统均表现出明显的重金属含量季节变化。植物体内重金属含量一般在冬季富集;芦苇根际沉积物中重金属的含量秋季较低,冬季富集,而海三棱草根际沉积物中Cu、Pb、Mn均在秋季含量较高,Zn、Cr冬季含量最高。
Based on the analysis of the contents of Cu, Pb, Mn, Zn, and Cr in the rhizosphere sediments of Phragmites australis and Scirpus mariqueter at tidal flat in Changjiang Estuary, the following conclusions can be drawn. Roots of the two plants have higher contents of Cu, Pb, Zn and Cr, while less content in the stems and leaves. The content of Mn in stems and leaves can account for up to 55%. Scirpus mariqueter can accumulate more heavy metals than Phragmites australis. And the heavy metal contents have seasonal changes in both of the plant and the sediments. Metals in plants are mainly accumulated in winter. Heavy metals in Phragmites australis rhizosphere sediment have lower contents in autumn, but are accumulated in winter. In Scirpus mariqueter rhizosphere sediment, Cu, Pb, Mn are mainly accumulated in winter, while Zn, Cr have the highest contents in winter.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2003年第1期38-41,共4页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金重点项目(40131020)
国家自然科学基金(40173030)
上海市青年科技启明星计划(97QA14023)
跟踪计划(01QMH1406)
国家教育部骨干教师计划资助
