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首页> 外文期刊>Environmental Pollution >The global warming potential of straw-return can be reduced by application of straw-decomposing microbial inoculants and biochar in rice-wheat production systems
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The global warming potential of straw-return can be reduced by application of straw-decomposing microbial inoculants and biochar in rice-wheat production systems

机译：通过在稻麦生产系统中使用分解秸秆的微生物接种剂和生物炭，可以降低秸秆还田的全球变暖潜力。

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摘要

Straw-return methods that neither negatively impact yield nor bring environmental risk are ideal patterns. To attain this goal, it is necessary to conduct field observation to evaluate the environmental influence of different straw-return methods. Therefore, we conducted a 2-year field study in 2015-2017 to investigate the emissions of methane (CH4) and nitrous oxide (N2O) and the changes in topsoil (0-20 cm) organic carbon (SOC) density in a typical Chinese rice-wheat rotation in the Eastern China. These measurements allowed a complete greenhouse gas accounting (net GWP and GHGI) of five treatments including: FP (no straw, plus fertilizer), FS (wheat straw plus fertilizer), FB (straw-derived biochar plus fertilizer), FSDI (wheat straw with straw-decomposing microbial inoculants plus fertilizer) and CK (control: no straw, no fertilizer). Average annual SOC sequestration rates were estimated to be 0.20, 0.97, 1.97 and 1.87 t C ha(-1) yr(-1) (0-20 cm) for the FP, FS, FB and FSDI treatments respectively. Relative to the FP treatment, the FS and FSDI treatments increased CH4 emissions by 12.4 and 17.9% respectively, but decreased N2O emissions by 19.1 and 26.6%. Conversely, the FB treatment decreased CH4 emission by 7.2% and increased N2O emission by 10.9% compared to FP. FB increased grain yield, but FS and FSDI did not. Compared to the net GWP (11.6 t CO2-eq ha(-1) yr(-1)) and GHGI (1.20 kg CO2-eq kg(-1) grain) of FP, the FS, FB and FSDI treatments reduced net GWP by 12.6, 59.9 and 34.6% and GHGI by 10.5, 65.8 and 37.7% respectively. In rice-wheat systems of eastern China, the environmentally beneficial effects of returning wheat straw can be greatly enhanced by application of straw-decomposing microbial inoculants or by applying straw-derived biochar. (C) 2019 Elsevier Ltd. All rights reserved.
机译：既不影响产量又不带来环境风险的秸秆还田方法是理想的模式。为了实现这一目标，有必要进行现场观察以评估不同秸秆还田方法对环境的影响。因此，我们在2015-2017年进行了为期2年的田间研究，以调查典型中国人的甲烷（CH4）和一氧化二氮（N2O）排放以及表土（0-20 cm）有机碳（SOC）密度的变化。中国东部的稻麦轮作。通过这些测量，可以对五种处理方法进行完整的温室气体核算（净GWP和GHGI），包括：FP（无秸秆，加肥料），FS（麦秸，加肥），FB（秸秆生物炭加肥料），FSDI（麦秸）含分解秸秆的微生物接种剂和肥料）和CK（对照：无秸秆，无肥料）。 FP，FS，FB和FSDI处理的平均年SOC封存率分别为0.20、0.97、1.97和1.87 t C ha（-1）yr（-1）（0-20 cm）。相对于FP处理，FS和FSDI处理分别增加了CH4排放量12.4和17.9％，但减少了N2O排放量19.1和26.6％。相反，与FP相比，FB处理将CH4排放降低了7.2％，将N2O排放增加了10.9％。 FB增加了谷物产量，但FS和FSDI没有增加。与FP的净GWP（11.6 t CO2-eq ha（-1）yr（-1））和GHGI（1.20 kg CO2-eq kg（-1）谷物）相比，FS，FB和FSDI处理降低了GWP分别增长12.6、59.9和34.6％，GHGI分别增长10.5、65.8和37.7％。在中国东部的稻麦系统中，通过使用可分解秸秆的微生物接种剂或通过使用源自秸秆的生物炭，可大大提高返回小麦秸秆的环境效益。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《Environmental Pollution》 |2019年第ptaa期|835-845|共11页
  • 作者

    Ma Yuchun; Liu De Li; Schwenke Graeme; Yang Bo;

  • 作者单位

    Nanjing Univ Informat Sci & Technol Coll Appl Meteorol Jiangsu Key Lab Agr Meteorol Nanjing Jiangsu Peoples R China|Chinese Acad Sci Inst Soil Sci State Key Lab Soil & Sustainable Agr Nanjing Jiangsu Peoples R China|Nanjing Univ Informat Sci & Technol Collaborat Innovat Ctr Forecast & Evaluat Meteoro Nanjing Jiangsu Peoples R China;

    Wagga Wagga Agr Inst NSW Dept Primary Ind Wagga Wagga NSW 2650 Australia|Univ New South Wales Climate Change Res Ctr Sydney NSW Australia|Univ New South Wales ARC Ctr Excellence Climate Extremes Sydney NSW Australia;

    Tamworth Agr Inst NSW Dept Primary Ind 4 Marsden Pk Rd Tamworth NSW Australia;

    Minist Agr Agroenvironm Protect Inst Tianjin Peoples R China;

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

    Biochar; Straw-decomposing microbial inoculants; Methane emission; Nitrous oxide emission; Net global warming potential;

    机译：生物炭分解秸秆的微生物接种剂;甲烷排放;一氧化二氮排放;净全球变暖潜力;

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