The effects of diverse microbial community structures, driven by arbuscular mycorrhizal fungi inoculation, on carbon release from a paddy field

Xue Zhang, Xiaodong Yu, Yunxiao Cao, Jiani Yue, Shan Wang and Yunxia Liu
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Xue Zhang: Shenyang Academy of Environmental Sciences, Shenyang, P.R. China
Xiaodong Yu: Shenyang Academy of Environmental Sciences, Shenyang, P.R. China
Yunxiao Cao: Shenyang Academy of Environmental Sciences, Shenyang, P.R. China
Jiani Yue: Shenyang Academy of Environmental Sciences, Shenyang, P.R. China
Shan Wang: Shenyang Academy of Environmental Sciences, Shenyang, P.R. China
Yunxia Liu: Shenyang Academy of Environmental Sciences, Shenyang, P.R. China

Plant, Soil and Environment, 2024, vol. 70, issue 1, 48-59

Abstract: Arbuscular mycorrhizal fungi (AMF) play a key role in regulating the carbon cycle in terrestrial ecosystems. However, there is little information on how AMF inoculation affects the carbon fluxes of paddy fields, which are major sources of global carbon emissions. We, therefore, designed an experiment to study the effects of AMF inoculation on methane and carbon dioxide emissions from a paddy field. Results showed that: (1) Among the tested factors, the C/N ratio was the main environmental determinant of microbial community structure in the investigated soil; (2) compared with traditional fertilisation (control), the soil C/N ratio increased by 2.1~15.2% and 1.4~10.5% as a result of AMF application alone (M) or in combination with mineral fertiliser (FM) throughout the growing season, respectively. This change shifted microbial community composition to higher G+/G- bacterial and fungal/bacterial ratios; (3) the microbial community change favoured soil carbon retention. Methane (CH4) emission peaks were reduced by 59.4% and 76.0% versus control in the M treatment and by 52.5% and 29.4% in the FM treatment in the midseason and end-of-season drainage periods, and CO2 emission peaks were reduced by 70.1% and 52.3% in the M plots and by 55.4% and 66.4% in the FM plots.

Keywords: Rhizophagus irregularis; global warming; gram-positive bacteria; chemoautotroph; decomposition (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:70:y:2024:i:1:id:340-2023-pse

DOI: 10.17221/340/2023-PSE

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