Interspecific Differences and Accumulative Characteristics of Cadmium and Lead About Seven Alfalfa(Medicago Sativa L) cultivars in a Lead-Zinc Mine of Yunnan, China

以云南某铅锌矿周边的农田为试验地，以7个紫花苜蓿（Medicago Sativa L）品种为植物材料开展田间大棚试验，研究各品种的株高、生物量、镉铅含量及累积量、富集系数和转移系数等指标，探讨不同紫花苜蓿对镉、铅的吸收累积特征及存在的品种差异。结果表明，从富集系数看，至开花期时（120 d），Cd富集能力最强的品种为游客，其Cd富集系数为0.054，地上部Cd含量为0.22 mg·kg-1，地上部Cd累积量为40.58 μg·m-2，分别为Cd富集能力最弱品种WL525HQ的245%、200%和245%。Pb富集能力最强的品种为国产，其Pb富集系数为0.035，地上部Pb含量为2.67 mg·...

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Bibliographic Details
Published in:Journal of agricultural resources and environment 2018-01, Vol.35 (3), p.222
Main Authors: Yang, Shu, Le, Jia, Yu-Fen, Bi, Fang-Dong, Zhan, Chen, Jian-Jun, Li, Bo, Yan-Qun, Zu, Li, Yuan
Format: Article
Language:Chinese
Subjects:
Accumulation
Alfalfa
Cadmium
Coefficients
Cultivars
Enrichment
Heavy metals
Interspecific
Lead
Science
Soil contamination
Soil sciences
Zinc
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Summary:以云南某铅锌矿周边的农田为试验地，以7个紫花苜蓿（Medicago Sativa L）品种为植物材料开展田间大棚试验，研究各品种的株高、生物量、镉铅含量及累积量、富集系数和转移系数等指标，探讨不同紫花苜蓿对镉、铅的吸收累积特征及存在的品种差异。结果表明，从富集系数看，至开花期时（120 d），Cd富集能力最强的品种为游客，其Cd富集系数为0.054，地上部Cd含量为0.22 mg·kg-1，地上部Cd累积量为40.58 μg·m-2，分别为Cd富集能力最弱品种WL525HQ的245%、200%和245%。Pb富集能力最强的品种为国产，其Pb富集系数为0.035，地上部Pb含量为2.67 mg·kg-1，地上部Pb累积量为282.2 μg·m-2，分别为Pb富集能力最弱品种WL525HQ的152%、153%和110%。多数受试品种对Cd、Pb具有较强的转运能力，其中对Cd转运能力最强的品种为三得利，其转运系数为1.545，是最弱品种国产的172%；对Pb转运能力最强的品种为国产，其转运系数为2.048，是最弱品种多叶的171%。综上，受试紫花苜蓿品种对Cd、Pb的吸收累积存在一定品种差异，若以地上部金属含量为指标，游客为Cd高累积品种，国产为Pb高累积品种，四季旺为Cd低累积品种，WL525HQ为Pb低累积品种。 For studying the interspecific differences and accumulation features of cadmium(Cd) and lead(Pb) about different alfalfa(Medicago Sativa L) varieties, greenhouse experiments were carried out in a lead-zinc mine of Yunnan and the indexes including plant height, biomass, content and accumulation of Cd and Pb, enrichment coefficient and transfer coefficient were measured. The results showed that from the enrichment coefficient, the variety having the stronge
ISSN:2095-6819
2095-6819
DOI:10.13254/j.jare.2017.0334