首页> 外文期刊>Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes >Distribution of the herbicide atrazine in a microcosm with riparian forest plants
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Distribution of the herbicide atrazine in a microcosm with riparian forest plants

机译:除草剂forest去津在河岸林植物的缩影中的分布

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摘要

Pesticides applied on sugarcane reach the subsoil of riparian forests and probably contaminate the river water. This work was conducted to learn about the phytoremediation of atrazine and subsoil contamination using the common riparian forest species of Cecropia hololeuca Miq. and Trema micranta (L.) Blum. These plants were grown in soil microcosms where 14C-atrazine at 1/10 of the field-recommended dose was applied at the bottom of the microcosm simulating the movement from contaminated ground water to the upper soil layers and into plants. Residues of 14C-atrazine were detected in all parts of the microcosm including soil, rhizosphere and the roots in different layers of the microcosm, stem and leaves. Atrazine mineralization was higher (10.2%) in the microcosms with plants than the control microcosms without plants (1.2%). The upward movement of this pesticide from deeper to more superficial soil layers occurred in all the microcosms with plants, powered by evapotranspiration process. From the atrazine applied in this study about 45% was taken up by C. hololeuca and 35% by T. micrantha. The highest amount of radioactivity (%) was found in the fine roots and the specific radioactivity (% g−1) showed that thick, fine roots and leaves bioaccumulate atrazine. The enhanced mineralization of atrazine as well the phytostabilization effect of the tree biomass will reduce the bioavailability of these residues and consequently decrease the hazardous effects on the environment.
机译:甘蔗上施用的农药到达河岸森林的土壤中,并可能污染河水。进行这项工作的目的是了解使用常见的沿岸小夜蛾Cecropia hololeuca Miq进行阿特拉津和底土污染的植物修复的方法。和Trema micranta(L.)Blum。这些植物生长在土壤微观世界中,在微观世界的底部模拟田间推荐剂量的1/10的 14 C-ulating去津,模拟从受污染的地下水向上层土壤的运动,进入植物。在微观世界的各个部分(包括土壤,根际和微观世界的不同根,茎和叶中的根)都检测到了 14 C--去津残留。有植物的微观世界中去津的矿化度较高(10.2%),而没有植物的对照微观世界中为1.2%。在蒸散作用的驱动下,这种杀虫剂从较深的土壤层向上移动到更浅的土壤层都发生在植物的所有微观世界中。从这项研究中使用的the去津中,约有45%的茶被C. hololeuca吸收,而3%的被T. micrantha吸收。在细根中发现最高的放射性(%),比放射性(%g â1’s )表明,粗细的根和叶会生物积累阿特拉津。阿特拉津的矿化作用增强以及树木生物量的植物稳定作用将降低这些残留物的生物利用度,从而减少对环境的有害影响。

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    Departamento de Microbiologia Geral, Instituto de Microbiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil;

    Inst. de Microbiologia/PPMR Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil;

  • 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);
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  • 正文语种 eng
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  • 入库时间 2022-08-18 00:57:58

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