| 三峡库区云阳消落带土壤重金属形态及其在植物中的富集和转移 |
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| 引用本文： | 谌金吾,孙一铭,杨占南,张显强,孙敏.三峡库区云阳消落带土壤重金属形态及其在植物中的富集和转移[J].中国岩溶,2012,31(4):415-422. |
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| 作者姓名： | 谌金吾 孙一铭 杨占南 张显强 孙敏 |
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| 作者单位： | 西南大学生命科学学院/三峡库区生态环境教育部重点实验室,重庆,400715 |
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| 基金项目： | 三峡库区生态环境与生物资源省部共建国家重点实验室培育基地开放基金项目 |
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| 摘 要： | 三峡大坝建成蓄水以来,其夏涨秋消的调度方式使得每年5-10月份在海拔145～175 m范围内形成291.1 km2的消落带.本文通过分析云阳消落带土壤重金属含量及其形态和重金属在消落带植物体根、茎、叶的分布,以及植物对重金属的生物富集和转移系数,来研究消落带重金属污染情况及重金属在土壤-植被的富集和转移规律.研究结果表明,云阳消落带存在较为严重的Cd污染,单因子污染指数为5.02,内梅罗综合污染指数为3.637；Cd和Cr主要是生物毒性不强残渣态；Cu形态主要是金属可交换态和碳酸盐结合态,生物毒性比较强；Mn的形态主要是铁锰结合态；Pb的形态分配比例均匀,生物毒性较弱.可交换态与转移系数极显著正相关,相关系数为0.981；有机及硫化物结合态与富集系数显著正相关,相关系数为0.905；铁锰结合态、碳酸盐结合态和残渣晶格结合态对富集和转移系数贡献都不大.三峡库区消落带重金属在植物体内的富集、转移主要由土壤中重金属可交换态和有机及硫化物结合态的性质决定.
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| 关 键 词： | 土壤-植物 重金属 富集 转移 相关分析 三峡库区消落带 |
| 收稿时间： | 5/2/2012 12:00:00 AM |
Soil heavy metal's form and their enrichment and transfer in plants in the water level fluctuating zone at Yunyang in Three Gorge reservoir area |
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| CHEN Jin-wu,SUN Yi-ming,YANG Zhan-nan,ZHANG Xian-qiang and SUN Min.Soil heavy metal's form and their enrichment and transfer in plants in the water level fluctuating zone at Yunyang in Three Gorge reservoir area[J].Carsologica Sinica,2012,31(4):415-422. |
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| Authors: | CHEN Jin-wu SUN Yi-ming YANG Zhan-nan ZHANG Xian-qiang and SUN Min |
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| Institution: | School of Life Science, Southwest University, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region(MOE);School of Life Science, Southwest University, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region(MOE);School of Life Science, Southwest University, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region(MOE);School of Life Science, Southwest University, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region(MOE);School of Life Science, Southwest University, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region(MOE) |
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| Abstract: | |
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| Keywords: | soil-plant heavy metal enrichment transfer correlation analysis water level fluctuating zone in the |
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