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首页> 外文期刊>The Science of the Total Environment >Influence of edaphic conditions and nitrogen fertilizers on cadmium and zinc phytoextraction efficiency of Noccaea caerulescens
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Influence of edaphic conditions and nitrogen fertilizers on cadmium and zinc phytoextraction efficiency of Noccaea caerulescens

机译：胶乳条件与氮肥对Noccaea Caerulcence的镉和锌植物萃取效率的影响

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摘要

The success of cadmium phytoextraction operations with Noccaea caerulescens varies by a factor of 70 between sites of trials. However, soil factors driving the efficiency of cadmium(Cd) and zinc (Zn) phytoextraction are still poorly understood, as are the effects of nitrogen fertilizers. We studied biomass production and Cd and Zn uptake by two contrasting populations of N. caerulescens, Ganges (metallicolous) and Wilwerwiltz (non-metallicolous) grown in pots on a range of 24 field contaminated soils for 20 weeks. The addition of KNO3 and NH4NO3 fertilizers was also tested. Using model averaging of multiple regression models, we show that the major drivers of N. caerulescens growth are physical soil factors such as organic matter and soil bulk density while trace metal accumulation mainly relies on soil Cd and Zn exchangeable concentrations. We confirm the negative effect of soil copper (Cu) on growth, even at exchangeable concentrations below 30 mg kg(-1), and therefore on uptake efficiency, while increasing soil lead (Pb) content was related to increased biomass probably due to a protective effect against soil pathogens. Finally, there is a small positive effect of nitrogen fertilization on biomass production only in soils with low initial nitrogen content (under 25 mu g g(-1) NO3-), while above this value, the positive impact of initial nitrogen content is offset by lower shoot Cd and Zn concentrations. Our data bring substantial information regarding the physico-chemical properties to ensure N. caerulescens growth: a soil bulk density under 1.05 kg/dm(3), organic matter above 7% and pH under 7.5. We show that phytoextraction efficiency is maximal for moderate soil contamination in Cd (2-10 mg kg(-1)) and Zn (300-1000 mg kg(-1)). (c) 2019 Elsevier B.V. All rights reserved.
机译：枸tExtractions与Noccaea的成功与Noccaea Caerulescens的成功变化在试验部位之间的70倍。然而，推动镉（CD）和锌（Zn）植物萃取效率的土壤因素仍然明白，因此氮肥的效果也是如此。我们将生物质生产和CD和Zn吸收通过在24个田间污染的土壤中成长为24个污染的土壤中的两种染色体，恒定群体，恒定的群体，恒定（金属色）和Wilwerwiltz（非金属溶解）。还测试了KNO3和NH4NO3肥料。利用多元回归模型的模型平均，我们表明N.Caerulescens生长的主要司机是有机质和土壤堆积密度等物理土壤因素，而痕量金属积聚主要依赖于土壤CD和Zn可交换浓度。我们确认土壤铜（Cu）对生长的负面影响，即使在低于30mg kg（-1）的可交换浓度，因此对吸收效率而言，在增加土壤铅（Pb）含量与增加的生物量有关，可能是由于a对土壤病原体的保护作用。最后，仅在初始氮含量的土壤中存在氮肥对生物质产生的浓度较小的积极作用（在25 mu gg（-1）下，虽然高于该值，但初始氮含量的阳性影响偏离降低芽CD和Zn浓度。我们的数据带来了有关物理化学性质的实质性信息，以确保N. CaErulcences的生长：在1.05kg / dm（3）下的土壤堆积密度，有机物以上7％和pH值为7.5。我们表明，植物萃取效率是CD中适度土壤污染的最大值（2-10mg kg（-1））和Zn（300-1000mg kg（-1））。 （c）2019 Elsevier B.v.保留所有权利。

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  • 来源
    《The Science of the Total Environment》 |2019年第may15期|649-659|共11页
  • 作者

    Jacobs Arnaud; Noret Nausicaa; Van Baekel Alexandre; Lienard Amandine; Colinet Gilles; Drouet Thomas;

  • 作者单位

    Univ Libre Bruxelles Fac Sci Lab Ecol Vegetale & Biogeochim CP 244 50 Av FD Roosevelt B-1050 Brussels Belgium;

    Univ Libre Bruxelles Fac Sci Lab Ecol Vegetale & Biogeochim CP 244 50 Av FD Roosevelt B-1050 Brussels Belgium;

    Univ Libre Bruxelles Fac Sci Lab Ecol Vegetale & Biogeochim CP 244 50 Av FD Roosevelt B-1050 Brussels Belgium;

    Univ Liege Gembloux Agrobio Tech BIOSE Dept Soil Water Plant Exchanges 2 Passage Deportes B-5030 Gembloux Belgium;

    Univ Liege Gembloux Agrobio Tech BIOSE Dept Soil Water Plant Exchanges 2 Passage Deportes B-5030 Gembloux Belgium;

    Univ Libre Bruxelles Fac Sci Lab Ecol Vegetale & Biogeochim CP 244 50 Av FD Roosevelt B-1050 Brussels Belgium;

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  • 正文语种 eng
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  • 关键词

    Nitrate; Fertilization; Hyperaccumulation; Phytoremediation; Lead; Copper;

    机译：硝酸盐;施肥;超剖视;植物化;铅;铜;

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