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首页> 外文期刊>The Science of the Total Environment >Effects of biochars combined with ferrous sulfate and pig manure on the bioavailability of Cd and potential phytotoxicity for wheat in an alkaline contaminated soil
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Effects of biochars combined with ferrous sulfate and pig manure on the bioavailability of Cd and potential phytotoxicity for wheat in an alkaline contaminated soil

机译：生物脉管结合硫酸亚铁和猪粪对碱性污染土壤CD和潜在植物植物的生物利用性的影响

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摘要

Reducing the content of Cd in wheat grains is necessary for human health, especially in alkaline farmland in northern China where a large area of soils is heavily polluted with Cd. A field experiment was conducted to investigate the effects of wheat straw biochar (WB) and maize straw biochar (MB) combined solely with ferrous sulfate (FeSO_4) or combined with FeSO_4 and pig manure (PFWB and PFMB) on Cd bioavailability in soil and the phytotoxicity of Cd in wheat in an alkaline contaminated soil. The results showed that the application of these treatments decreased the concentrations of CaCl_2-extractable Cd by 32.8-60.5% and increased the soil organic matter by 36.8-106.7% compared with those of the control treatment. The acid-soluble fraction of Cd was decreased by 3.7-16.8% but the residual fraction was increased by 1.7-13.7%. Furthermore, the addition of WB and MB increased the soil pH by 0.29 and 0.16 units, respectively, while the other treatments decreased the soil pH by 0.16-0.37 units. The concentrations of Cd in different wheat tissues were decreased in amended soils, and these decreases were positively correlated with CaCl_2-extractable Cd and the acid-soluble fraction of Cd. The ability to accumulate Cd was in the order of root＞straw＞grain. In addition, there was a downward trend in the bio-concentration and translocation factors under different amendments. The amendments of PFWB and PFMB had better efficiency in the immobilization of Cd in soil and the inhibition of Cd uptake of wheat than WB and MB. In addition, the treatments of PFWB and PFMB increased the wheat yield by 14.3-16.2%, and thus have a great application prospect based on the cost-benefit analysis.
机译：减少小麦颗粒中CD的含量是人类健康所必需的，特别是在中国北方的碱土中，大面积的土壤受到CD严重污染。进行了田间实验，以研究小麦秸秆生物炭（WB）和玉米秸秆生物炭（MB）的影响，仅用硫酸亚铁（FeSO_4），或与FeSO_4和猪粪（PFWB和PFMB）联合土壤中的CD生物利用度碱性污染土壤中小麦的CD植物毒性。结果表明，这些处理的应用降低了CaCl_2-可提取的Cd的浓度，并将土壤有机物质与对照治疗相比增加了36.8-106.7％。 Cd的酸可溶性级分降低3.7-16.8％，但残留级分增加1.7-13.7％。此外，将WB和MB的添加分别将土壤pH增加0.29和0.16单位，而其他处理将土壤pH降低0.16-0.37单位。在修复的土壤中降低了不同小麦组织中的Cd浓度，并且这些降低与CaCl_2可提取的Cd和Cd的酸可溶性级分具有正相关。累积CD的能力按根>秸秆>谷物的顺序。此外，在不同修正案下的生物浓度和易位因子下存在下降趋势。 PFWB和PFMB的修正案在土壤中的CD固定中具有更好的效率，并抑制小麦的CD摄取而不是WB和MB。此外，PFWB和PFMB的处理将小麦产量增加14.3-16.2％，因此基于成本效益分析具有良好的应用前景。

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  • 来源
    《The Science of the Total Environment》 |2021年第20期|141832.1-141832.7|共7页
  • 作者

    Zhenyan Chen; Zhiwei Lu; Yaping Zhang; Beibei Li; Chunhong Chen; Kai Shen;

  • 作者单位

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 210096 China;

    JSTI Group Co. Ltd. Nanjing 210000 China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 210096 China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 210096 China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 210096 China;

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing 210096 China;

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  • 正文语种 eng
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  • 关键词

    Cadmium; Biochar; Fraction; Alkaline contaminated soils; Bioavailability;

    机译：镉;生物炭;分数;碱性受污染的土壤;生物利用度;

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