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首页> 外文期刊>Plant and Soil >Plant and soil effects on denitrification potential in agricultural soils
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Plant and soil effects on denitrification potential in agricultural soils

机译：农业土壤中抵抗潜力的植物与土壤影响

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摘要

Background and aimsMicrobial denitrification is the primary driver of nitrogen losses from the plant-soil system and the key process for the closure of the global N cycle. All major controls of denitrification might be directly or indirectly affected by plants. However, there is a lack of research of the direct effects of plants on soil denitrification and how this effect might be mediated by soil properties. This study assesses the effect of three common crop species and two agricultural soils on denitrification potentials.MethodsWe conducted a factorial experiment under controlled conditions to analyze the effects of (1) different plant species (barley, wheat or ryegrass), (2) two different soils (texture/ SOC) and (3) two different soil moisture levels on Denitrification Enzyme Activity (DEA) in bulk and rhizosphere soil.ResultsThe SOC richer clay loam soil showed on average higher DEA (+81%) compared to the SOC poorer silty loam soil. All three plants were found to stimulate denitrification with significant differences between certain species: rye grass (+92%14%)>= barley (+75%+/- 26%)>= wheat (+50%+/- 19%).Conclusions DEA in agricultural soils is interactively controlled by plant species and soil type with an overall stimulating effect of plants on the denitrification potential. Future research should focus on disentangling single mechanisms of plant control on actual denitrification rates and N gas product ratios.
机译：背景技术和AIMSMICIAL脱氮是植物 - 土壤系统的氮损耗的主要驱动器和全球N个循环的关键过程。脱氮的所有主要控制可能直接或间接地受植物的影响。然而，缺乏对植物对土壤反硝化的直接影响的研究以及如何通过土壤性质介导的这种效果。本研究评估了三种常见的作物物种和两种农业土壤对脱氮潜力的影响。近期在受控条件下进行了阶乘实验，分析了（1）不同植物物种（大麦，小麦或黑麦草）的影响，（2）两种不同土壤（纹理/ SOC）和（3）散装和根际土壤中脱氮酶活性（DEA）的两种不同的土壤水分水平。与SoC较贫穷的粉质相比，Soc Richer Clay Loam土壤的水平较高（+ 81％）显示泥土土壤。发现所有三种植物刺激脱氮，在某些物种之间存在显着差异：黑麦草（+ 92％14％）> =大麦（+ 75％+ / - 26％）>小麦（+ 50％+ / - 19％） 。Conclusions农业土壤中的DEA通过植物物种和土壤类型的互动控制，植物对脱硝潜力的整体刺激作用。未来的研究应专注于在实际脱氮率和N天然气产品比例上解散植物控制的单一机制。

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  • 来源
    《Plant and Soil》 |2019年第2期|共16页
  • 作者

    Malique Francois; Ke Piaopiao; Boettcher Juergen; Dannenmann Michael; Butterbach-Bahl Klaus;

  • 作者单位

    Karlsruhe Inst Technol Inst Meteorol &

    Climate Res Atmospher Environm Res LMK IFU D-82467 Garmisch Partenkirchen Germany;

    Tsinghua Univ Sch Environm State Key Lab Environm Simulat &

    Pollut Control Beijing 100084 Peoples R China;

    Leibniz Univ Hannover Inst Soil Sci D-30419 Hannover Germany;

    Karlsruhe Inst Technol Inst Meteorol &

    Climate Res Atmospher Environm Res LMK IFU D-82467 Garmisch Partenkirchen Germany;

    Karlsruhe Inst Technol Inst Meteorol &

    Climate Res Atmospher Environm Res LMK IFU D-82467 Garmisch Partenkirchen Germany;

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

    Denitrification potential; DEA; Plant stimulation; Soil texture;

    机译：反硝化潜力;DEA;植物刺激;土壤纹理;

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