Cited by 111Soil Carbon and Nitrogen DynamicsMicrobial Community Ecology and PhysiologyWastewater Treatment and Nitrogen Removal

Assessment of bacterial community composition, methanotrophic and nitrogen-cycling bacteria in three soils with different biochar application rates

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Abujabhah, Ibrahim S., Doyle, Richard B., Bound, Sally A., Bowman, John P.·2018·Journal of Soils and Sediments

Abstract

PurposeThe increased use of biochar as a soil amendment to alleviate the impact of agricultural practices on climate change has been a motivation for many studies to determine the effects of biochar on soil properties, particularly the abundance and activities of soil microbes and related biological processes. This study investigates the impact of different application rates of wood-derived biochar on community structure, nitrogen-cycling and methanotrophic bacteria in three soil types.Materials and methodsBiochar was added at 0, 2.5, 5 and 10% w/w to black clay loam (BCL, Vertosol), red loam (RL, Dermosol) and brown sandy loam (BSL, Kurosol) soils. Soil chemical analysis and 16S rRNA gene amplicon sequencing using the IIlumina Mi-Seq platform were conducted on initial samples and after 10-month incubation.Results and discussionThe results indicated that the addition of biochar loading levels to the different soils had a significant impact on NH4 and NO3, total C and N, pH, electrical conductivity (EC) and soil moisture content. These changes were reflected in significant differences in the bacterial diversity between biochar treatments in the BSL and RL soils, while the BCL soil was more resilient to change. Complete ammonia-oxidising (Nitrospira) and nitrite-oxidising bacteria (NOB) were more abundant than standard ammonia-oxidising bacteria (AOB) in all soils. Increased biochar loading raised the abundance of nitrifying bacteria in BCL soil while Nitrospira became more abundant in BSL soil. Biochar addition affected the abundance of certain N2 fixer groups in a soil-dependent manner. Strong positive correlations were observed in Rhizobium (r = 0.99) and Azospirillum abundance (r = 0.70) with increased biochar loading rates in BCL. Greater biochar loading also significantly increased the relative abundance of methanotrophs, especially in BCL soil.ConclusionsThe impact of biochar on community structure and nitrogen-cycling bacteria depended on soil types and biochar rates which correlated to the differences in soil properties. Overall, the abundance of nitrogen-cycling bacterial groups seemed to be most affected by the changes in soil conditions, including aeration, C/N ratio, nutrients and pH in relation to biochar application in different soils. These changes show that short-term biochar loading influences community structure and leads to increases in populations of methanotrophic and nitrifying bacteria.

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Crossref · 10.1007/s11368-017-1733-1

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  • The effects of biochar on soil microbial community structure and nitrogen-cycling bacteria depend on several factors, such as soil type, C/N ratio, nutrients, pH, and biochar addition rates.

    “The effects of biochar on soil microbial community structure and N-cycling bacteria depends on several factors, such as soil type, C/N ratio, nutrients, pH, and biochar addition rates (Abujabhah et al. 2018).”

    From Biochar and its importance on nutrient dynamics in soil and plant (2020) · cites this paper as Abujabhah et al. 2018

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Authors
Abujabhah, I. S., Doyle, R. B., Bound, S. A., & Bowman, J. P.
Affiliations
University of Tasmania (AU)
Corresponding author
Abujabhah, Ibrahim S.
Venue
Journal of Soils and Sediments
Published
2017-05-23
Volume
18
Issue
1
Pages
148-158
ISSN
  • 1439-0108 (ISSN-L)
  • 1614-7480
OpenAlex
W2617253024
Cited by
111
References
45
Citations by year
2026: 13 · 2025: 14 · 2024: 15 · 2023: 12 · 2022: 9 · 2021: 15 · 2020: 13 · 2019: 15 · 2018: 3 · 2017: 2
FWCI
9.89
Type
journal article
Language
en
Open access
Locations
  • Journal of Soils and Sediments (publishedVersion)
  • eCite Digital Repository (University of Tasmania) (submittedVersion)
  • UTAS Research Repository (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
  • Physical Sciences › Environmental Science › Pollution › Wastewater Treatment and Nitrogen Removal
Keywords
soil amendment, soil bacterial communities, methanotrophic bacteria, nitrogen-cycling bacteria, nitrifying bacteria, Nitrospira, ammonia-oxidizing bacteria, nitrification, nitrogen fixation, Rhizobium, Azospirillum, soil type, Vertosol, soil properties, 16S rRNA gene sequencing

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