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Quantitative analysis of soil sustainability after applying stabilizing amendments in long-term Cd-contaminated paddy soils

机译：在长期CD污染水稻土中施用稳定修正后土壤可持续性的定量分析

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摘要

Considering the biomagnification in food chains, cadmium (Cd) contamination in paddy fields has become concerning. The remediation of soil cadmium by the addition of amendments is a common agricultural practice. However, it remains ambiguous whether amendment use decreases soil environmental quality (SEQ) and sustainability. In this study, five compound amendments with different pH were utilized in long-term Cd-contaminated paddy soils. The SEQ of all treatments was quantitatively assessed according to a comprehensive evaluation mathematical model (Criteria Importance Through Inter-criteria Correlation (CRITIC)-Technique for Order Preference by Similarity to Ideal Solution (TOPSIS)), and the indicators involved in microbial functional gene (MFG) abundance, soil physicochemical and microbiological properties (CMP) and soil microbial function (N-related enzyme and transformation rate, N-ET) were measured. The results show that the SQE and remediation effect (expressed by the decrease in available Cd (ACd), %) in our treatments were alkaline natural acidic except for D alkaline treatment. The significant contradiction between soil SQE and remediation effect in D treatment attribute to its dose effects, which inhibiting microbial nitrogen assimilation and dissimilation and therefore counteracts the promoting effect of the decrease in ACd. Based on this discussion, three alkaline amendments (A, B and D) with similar effective remediation effect were employed in four other Cd-contaminated soils. Results indicated that both negative effect (D treatment) and promoting effect (A and B treatment) existed in the next 3 years.
机译：考虑到食品链中的生物磁化，稻田中的镉（CD）污染已经有所了解。通过添加修改来修复土壤镉是一种常见的农业实践。但是，仍然存在修正使用的含糊不清，是否会降低土壤环境质量（SEQ）和可持续性。在这项研究中，在长期CD污染的水稻土中使用了具有不同pH的五种复合修正。定量评估所有治疗的SEQ根据综合评估数学模型（通过标准际关系标准重要性（评论家） - 通过相似性与理想解决方案（TOPSIS）的顺序偏好，以及参与微生物功能基因的指标（测量MFG）丰度，土壤理疗细胞和微生物特性（CMP）和土壤微生物功能（N相关酶和转化率，N-ET）。结果表明，我们治疗中的SQE和修复效应（表达可用CD（ACD），％）的治疗中的碱性＆天然＆除了D碱性处理外的酸性。 D治疗属性对其剂量效应的土壤SQE与修复效应的重大矛盾，抑制微生物氮同化和偏析，因此抵消了ACD降低的促进效应。基于该讨论，在四个其他CD污染的土壤中使用具有类似有效修复效果的三种碱性修正案（A，B和D）。结果表明，未来3年内存在负效应（D治疗）和促进效果（A和B治疗）。

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  • 来源
    《Environmental Pollution》 |2021年第10期|117205.1-117205.10|共10页
  • 作者

    Chen Yi; Zhang Zhe; Gao Cheng; Deng Wenyang; Chen Wenqing; Ao Tianqi;

  • 作者单位

    Sichuan Univ Coll Architecture & Environm Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture & Environm Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture & Environm Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture & Environm Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture & Environm Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Water Resource & Hydropower Chengdu 610065 Sichuan Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cadmium-contaminated paddy field; Soil environmental quality; Evaluation methodology; Sustainability;

    机译：镉污染的稻田;土壤环境质量;评价方法;可持续性;

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