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Influences of charcoal and bamboo charcoal amendment on soil-fluoride fractions and bioaccumulation of fluoride in tea plants

机译:木炭和竹炭改性剂对茶树中土壤中的氟含量和氟生物累积的影响

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摘要

High levels of fluoride in tea plants pose a potential health risk to humans who drink tea. It has been demonstrated that tea plant fluoride is closely related to the available fluoride in soil. But approaches that could be used to regulate the availability of fluoride in soil have been rarely seen. This study aims to investigate how the addition of charcoal and bamboo charcoal affected soil fluoride availability and bioaccumulation of fluoride in tea plants. In a microcosm experiment, tea plants were grown in the tea garden soil mixed with different amounts of charcoal and bamboo charcoal [that is, 0.5, 1.0, 2.5, and 5.0 % (w/w)]. Soil-fluoride fractions and fluoride accumulated in tea plants were determined using the sequential extraction and ion selective electrode method. Obtained results showed that both charcoal and bamboo charcoal additions significantly enhanced the concentrations of Fe/Mn oxide-bound fluoride, but significantly reduced the concentrations of water-soluble and exchangeable fluoride (p < 0.05) in soil. Charcoal and bamboo charcoal additions also significantly decreased the amounts of fluoride in tea roots and tea leaves (p < 0.05). However, the additions of charcoal and bamboo charcoal had no impacts on the tea quality, as indexed by the concentrations of polysaccharides, polyphenols, amino acids, and caffeine in tea leaves. These results suggested that application of charcoal and bamboo charcoal may provide a useful method to reduce the availability of fluoride in soil and the subsequent fluoride uptake by tea plants.
机译:茶树中的氟化物含量高会对喝茶的人造成健康隐患。已经证明茶树中的氟化物与土壤中的有效氟化物密切相关。但是很少有可用于调节土壤中氟化物有效性的方法。这项研究旨在调查添加木炭和竹炭如何影响土壤氟的有效性以及茶树中氟的生物积累。在微观实验中,茶树种植在茶园土壤中,混合了不同量的木炭和竹炭(即0.5、1.0、2.5和5.0%(w / w))。使用顺序萃取和离子选择电极法测定茶树中土壤中的氟化物含量和累积的氟化物。获得的结果表明,木炭和竹炭的添加均显着增加了与Fe / Mn氧化物结合的氟化物的浓度,但显着降低了土壤中水溶性和可交换的氟化物的浓度(p <0.05)。添加木炭和竹炭还可以显着减少茶根和茶叶中的氟化物含量(p <0.05)。但是,以茶叶中多糖,多酚,氨基酸和咖啡因的浓度为指标,添加木炭和竹炭对茶的品质没有影响。这些结果表明,使用木炭和竹炭可能会提供一种有用的方法,以减少土壤中氟化物的利用率以及随后茶树对氟化物的吸收。

著录项

  • 来源
    《Environmental Geochemistry and Health》 |2012年第5期|p.551-562|共12页
  • 作者单位

    Key Laboratory of Tea Biochemistry and Biotechnology,Ministry of Education, Anhui Agricultural University,Hefei 230036, China,State Key Lab of Soil and Sustainable Agriculture,Institute of Soil Science, Chinese Academy of Sciences,Nanjing 210008, China;

    Key Laboratory of Tea Biochemistry and Biotechnology,Ministry of Education, Anhui Agricultural University,Hefei 230036, China;

    Key Laboratory of Tea Biochemistry and Biotechnology,Ministry of Education, Anhui Agricultural University,Hefei 230036, China;

  • 收录信息 美国《科学引文索引》(SCI);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

    charcoal; bamboo charcoal; soil-fluoride fractions; tea plants; bioaccumulation; translocation;

    机译:木炭;竹炭土壤氟化物部分;茶树;生物蓄积易位;
  • 入库时间 2022-08-17 13:27:48

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