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Effect of selected organic materials on soil humic acids chemical properties

机译：选定有机物对土壤腐殖酸化学性质的影响

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摘要

Environmental friendly agricultural management has an urgent need for finding a sustainable strategy for the usage of different by-products from bioenergy production. These are either used as soil amendments or fertilizers. This study is aimed at evaluating if and how soil organic matter changes after the application of biochar, compost, and digestate. A pot experiment was conducted with Haplic Cambisol (low range arable soil) in Phytotron CLF PlantMaster (Wertingen, Germany). The chemical composition of isolated humic acids (HA) was determined by an inductively coupled plasma-mass spectrometer (ICP-MS). FT-IR spectroscopy and CHNS analysis were used for detailed chemical and optical characterization. Soil magnetic properties - radical concentration, g-parameters of radicals, and iron ions were evaluated by EPR spectroscopy. The results showed that amending arable soil with biochar, digestate and compost results in chemical and structural changes of humic substances. The radicals originated in biochar and digestate are built-in to the structure of the humic acid, which was confirmed by EPR g-parameter values. Despite a relatively high concentration of paramagnetic metal ions Fe and Mn the effect of semiquinone radical quenching was not observed. That suggests a conclusion that metal ions of studied amendments are binding in HA structure and did not disturb natural radical processes in the soil. It was also concluded that the effect of applied material depends mainly on its chemical properties and the soil type.
机译：环境友好的农业管理迫切需要寻找可持续战略，从生物能源生产中使用不同的副产品。这些要么用作土壤修正或肥料。本研究旨在评估施用生物炭，堆肥和消化后的土壤有机质的变化。在Phytotron Clf Plantmaster（Wertingen，Germany）中，用锅副本（低范围植物土壤）进行了罐实验。通过电感耦合等离子体质谱仪（ICP-MS）测定分离的腐殖酸（HA）的化学成分。 FT-IR光谱和CHNS分析用于详细的化学和光学表征。土壤磁性性 - 通过EPR光谱评估基团浓度，自由基的G参数和铁离子。结果表明，用生物炭修改耕地，消化和堆肥导致腐殖质物质的化学和结构变化。源自生物炭和消化物的基团是由EPR G参数值证实的腐殖酸结构的基础上。尽管具有相对高的顺磁性金属离子Fe和Mn，但未观察到半醌自由基猝灭的效果。这表明所研究的金属离子在HA结构中具有结合，并且在土壤中没有干扰自然自由基过程。还得出结论，应用材料的影响主要取决于其化学性质和土壤类型。

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  • 来源
    《Environmental research》 |2020年第8期|109663.1-109663.5|共5页
  • 作者

    Lubica Pospisilova; Eva Horakova; Miroslav Fisera; Maria Jerzykiewicz; Ladislav Mensik;

  • 作者单位

    Mendel University in Brno Faculty of AgriSciences Department of Agrochemistry Soil Science Microbiology and Plant Nutrients Zemedelskd 1 613 00 Brno Czech Republic;

    Mendel University in Brno Faculty of AgriSciences Department of Agrochemistry Soil Science Microbiology and Plant Nutrients Zemedelskd 1 613 00 Brno Czech Republic;

    College of Business and Hotel Management Institute of Gastronomy Bosonozskd 9 625 00 Brno Czech Republic;

    Wroclaw University Faculty of Chemistry Wroclaw F. Joliot-Curie 14 50-383 Wroclaw Poland;

    Crop Research Institute Division of Crop Management Systems Drnovskd 507/73 161 06 Praha 6-Ruzyne Czech Republic;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biochar; Digestate; Compost; Soil humic acids; Metal ions; EPR spectroscopy;

    机译：生物炭;消化;堆肥;土壤腐殖酸;金属离子;EPR光谱学;

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