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Current inventory and changes of the input/output balance of trace elements in farmland across China

机译:中国农田中微量元素的当前清单和投入产出平衡的变化

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摘要

The inventory and input/output balance of trace elements in farmland play an important role in risk assessment and soil management, but there is little information about nationwide changes of the input/output balance of trace elements in farmland in China. In the present study, the inventory of trace element inputs to farmland was updated based on the dataset from the literature published during 2006–2015, and changes of the input/output balance were investigated. Compared with 1999–2006, net inputs of Cr, Ni, and Zn increased by 52.9%, 59.7%, and 20.6%, respectively. The increases in fossil fuel derived energy consumption, industrial manufacture, municipal solid waste incineration, and transportation were the predominant contributors to these increases. Net inputs of Cd, Cu, and Hg decreased dramatically by 46.7%, 25.2%, and 50.4%, respectively. The decreases are due to the strict management of feed additives, fertilizers, and emissions of atmospheric pollutants. Net inputs of As and Pb still remained relatively stable. These results demonstrated that better achievements have been gained by administration of air, water and soil in China. Regulation of atmospheric emission for Cr, Ni, and Zn was recommended as atmospheric deposition was the predominant source for increases of Cr, Ni, and Zn inputs to farmland across China.
机译:农田中微量元素的存量和投入/产出平衡在风险评估和土壤管理中起着重要作用,但是关于全国农田中微量元素的投入/产出平衡变化的信息很少。在本研究中,根据2006-2015年间发表的文献中的数据集更新了农田中微量元素输入的清单,并调查了输入/输出平衡的变化。与1999-2006年相比,铬,镍和锌的净投入分别增长了52.9%,59.7%和20.6%。化石燃料产生的能源消耗,工业生产,城市固体废物焚化和运输的增加是这些增加的主要原因。镉,铜和汞的净输入量分别大幅下降了46.7%,25.2%和50.4%。减少的原因是饲料添加剂,肥料的严格管理以及大气污染物的排放。砷和铅的净投入仍然保持相对稳定。这些结果表明,通过管理空气,水和土壤在中国取得了更好的成就。建议对大气中的Cr,Ni和Zn进行排放调节,因为大气沉积是中国农田中Cr,Ni和Zn投入增加的主要来源。

著录项

  • 期刊名称 PLoS Clinical Trials
  • 作者

    Runxiang Ni; Yibing Ma;

  • 作者单位
  • 年(卷),期 2012(13),6
  • 年度 2012
  • 页码 e0199460
  • 总页数 14
  • 原文格式 PDF
  • 正文语种
  • 中图分类
  • 关键词

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