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首页> 外文期刊>Journal of Environmental Management >Sorption, leaching and persistence of metribuzin in Mediterranean soils amended with olive mill waste of different degrees of organic matter maturity
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Sorption, leaching and persistence of metribuzin in Mediterranean soils amended with olive mill waste of different degrees of organic matter maturity

机译：在不同土壤有机质成熟度的橄榄磨坊废料的作用下，美特津在地中海土壤中的吸附，浸出和持续存在

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摘要

Metribuzin is a widely used herbicide, and worldwide is one of the most important contaminants in ground and surface waters. The aim of this study was to evaluate the impact amendment with fresh, composted, and field-aged olive mill waste (OW, COW, and AOW, respectively) had on the behaviour of this herbicide in four typical Mediterranean soils. A batch equilibration method was used to determine metribuzin adsorption-desorption. Leaching experiments were studied in hand-packed soil columns. Half-lives were calculated with incubation studies. Soil dehydrogenase activity (DHA) was also monitored. Metribuzin adsorption in the soils increased not only with increasing amounts of amendment, but especially with increasing degree of organic matter humification. Compared to unamended soils, the adsorption capacity increased by between 81% and 216%, 135% and 193%, and by 363% for the OW, COW, and AOW amended soils, respectively, at a 5% rate of application. The addition of COW enhanced metribuzin degradation in all the soils. In contrast, OW addition increased metribuzin persistence, attributable mainly to the inhibitory effect of this amendment on microbial activity, especially in the acidic soils. The AOW-amended soils, which had the smallest labile fraction of soil organic matter and greatest degree of humification, showed the shortest herbicide persistence. The OW and COW amendments significantly reduced the amount of metribuzin leached. This was especially so in the latter case because of the higher sorption capacity and the faster degradation of the pesticide. The use of OW as organic amendment, especially when it has a high degree of organic matter humification, may be a useful management practice for reducing the risk of groundwater contamination by metribuzin in soils with low organic matter content.
机译：Metribuzin是一种广泛使用的除草剂，在世界范围内是地下水和地表水中最重要的污染物之一。这项研究的目的是评估在新鲜的，堆肥的和田间陈年的橄榄碾磨机废料（分别为OW，COW和AOW）对这种除草剂在四种典型的地中海土壤中的行为的影响。分批平衡法被用来测定甲曲嗪的吸附-解吸。在手工填充的土壤柱中研究了浸出实验。通过孵育研究计算半衰期。还监测了土壤脱氢酶活性（DHA）。二甲双胍在土壤中的吸附不仅随着修正量的增加而增加，而且随着有机物腐殖化程度的增加而增加。与未改良土壤相比，在5％的施用量下，OW，COW和AOW改良土壤的吸附能力分别提高了81％和216％，135％和193％和363％。 COW的添加增强了所有土壤中的metribuzin降解。相反，OW的添加增加了metribuzin的持久性，这主要归因于该修饰物对微生物活性的抑制作用，尤其是在酸性土壤中。经AOW改良的土壤，其有机物的不稳定部分最小，腐殖化程度最高，其除草剂持久性最短。 OW和COW修正案大大减少了美沙津的浸出量。在后一种情况下尤其如此，因为农药具有更高的吸附能力和更快的降解速度。 OW作为有机改良剂的使用，尤其是当有机质的增湿程度很高时，可能是一种有用的管理实践，可降低甲羟嗪对低有机质含量土壤中地下水污染的风险。

著录项

  • 来源
    《Journal of Environmental Management》 |2013年第15期|76-84|共9页
  • 作者

    Antonio Lopez-Pineiro; David Pena; Angel Albarran; Daniel Becerra; Javier Sanchez-Llerena;

  • 作者单位

    Department of Plant Biology, Ecology and Earth Sciences, Faculty of Sciences, University of Extremadura, Avda. de Elvas s, 06071 Badajoz, Spain;

    Department of Plant Biology, Ecology and Earth Sciences, Faculty of Sciences, University of Extremadura, Avda. de Elvas s, 06071 Badajoz, Spain;

    Department of Forest and Agricultural Engineering, University of Extremadura, Ctra, de Caceres, 06071 Badajoz, Spain;

    Department of Forest and Agricultural Engineering, University of Extremadura, Ctra, de Caceres, 06071 Badajoz, Spain;

    Department of Plant Biology, Ecology and Earth Sciences, Faculty of Sciences, University of Extremadura, Avda. de Elvas s, 06071 Badajoz, Spain;

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

    Metribuzin; Dehydrogenase activity; Leaching; Persistence; Olive mill waste; Organic matter maturity;

    机译：Metribuzin;脱氢酶活性;浸出坚持不懈橄榄厂废料;有机物成熟度;

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