Effects of biochar on soil microbial communities: A meta-analysis

Deshoux, Maëlle; Sadet-Bourgeteau, Sophie; Gentil, Solène; Prévost-Bouré, Nicolas Chemidlin

doi:10.1016/j.scitotenv.2023.166079

Cited by 27 publications

(3 citation statements)

References 280 publications

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“…Biochar application also directly modulates soil microbial activity and community structure through serving as a habitat or indirectly by altering soil redox processes and physico-chemical properties (e.g., biochar adsorptive characteristics can increase soil porosity and water-holding capacity) (Jaafar et al 2014;Azeem et al 2022). Indirect biochar or straw effects on microorganisms also depend on their feedstock and formation conditions (Deshoux et al 2023;Luo et al 2013). Consequently, the indirect effects of substances on microorganisms should be considered.…”

Section: Microbial Mechanisms Of Som Mineralization Induced By Straw ...mentioning

confidence: 99%

Microbial mechanisms of organic matter mineralization induced by straw in biochar-amended paddy soil

Liu,

Wu,

Wei

et al. 2024

Biochar

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Combined straw and straw-derived biochar input is commonly applied by farmland management in low-fertility soils. Although straw return increases soil organic matter (SOM) contents, it also primes SOM mineralization. The mechanisms by which active microorganisms mineralize SOM and the underlying factors remain unclear for such soils. To address these issues, paddy soil was amended with 13C-labeled straw, with and without biochar (BC) or ferrihydrite (Fh), and incubated for 70 days under flooded conditions. Compound-specific 13C analysis of phospholipid fatty acids (13C-PLFAs) allowed us to identify active microbial communities utilizing the 13C-labeled straw and specific groups involved in SOM mineralization. Cumulative SOM mineralization increased by 61% and 27% in soils amended with Straw + BC and Straw + Fh + BC, respectively, compared to that with straw only. The total PLFA content was independent of the straw and biochar input. However, 13C-PLFAs contents increased by 35–82% after biochar addition, reflecting accelerated microbial turnover. Compared to that in soils without biochar addition, those with biochar had an altered microbial community composition-increased amounts of 13C-labeled gram-positive bacteria (13C-Gram +) and fungi, which were the main active microorganisms mineralizing SOM. Microbial reproduction and growth were susceptible to nutrient availability. 13C-Gram + and 13C-fungi increased with Olsen P but decreased with dissolved organic carbon and $${\text{NO}}_{3}^{ - }$$ NO 3 - contents. In conclusion, biochar acts as an electron shuttle, stimulates iron reduction, and releases organic carbon from soil minerals, which in turn increases SOM mineralization. Gram + and fungi were involved in straw decomposition in response to biochar application and responsible for SOM mineralization. Graphical Abstract

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Section: Microbial Mechanisms Of Som Mineralization Induced By Straw ...mentioning

confidence: 99%

Microbial mechanisms of organic matter mineralization induced by straw in biochar-amended paddy soil

Liu,

Wu,

Wei

et al. 2024

Biochar

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“…Biochar's influence on soil microorganisms is primarily due to its ability to alter the soil environment [287], leading to increased species diversity and soil fertility [288,289]. This could impact soil ecological health and agricultural productivity [290].…”

Section: Role Of Soil Microbes In Carbon Sequestrationmentioning

confidence: 99%

Soil Microbiome: Diversity, Benefits and Interactions with Plants

Chauhan,

Sharma,

Tapwal

et al. 2023

Sustainability

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Plant roots aid the growth and functions of several kinds of microorganisms such as plant growth-promoting rhizobacteria, mycorrhizal fungi, endophytic bacteria, actinomycetes, nematodes, protozoans which may impart significant impacts on plant health and growth. Plant soil–microbe interaction is an intricate, continuous, and dynamic process that occurs in a distinct zone known as the rhizosphere. Plants interact with these soil microbes in a variety of ways, including competitive, exploitative, neutral, commensal, and symbiotic relationships. Both plant and soil types were found to have an impact on the community diversity and structure of the rhizosphere, or vice versa. The diversity of microorganisms in soil is thought to be essential for the management of soil health and quality because it has different plant growth-promoting or biocontrol effects that could be very advantageous for the host plant and alter plant physiology and nutrition. The composition of microbial community is influenced by soil and plant type. Besides these beneficial microbes, the soil also harbors microorganisms that are detrimental to plants, competing for nutrients and space, and causing diseases. Numerous microorganisms have antagonistic activity and the ability to defend plants from soil-borne diseases. The study of the soil microbiome is essential for formulating strategies for transforming the rhizosphere to the benefit of the plants. This review pays special emphasis on the types of microbial populations in the soil and how they influence plant growth, nutrient acquisition, inter-relationships between soil microbes and plants, stress resistance, carbon sequestration, and phytoremediation.

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“…Furthermore, biochar aging in the soil leads to alterations in soil properties, which has either positive or negative effects on the soil (Wang et al 2021;Yang et al 2022bYang et al , 2022aQiu et al 2023). Soil microorganisms dominate the carbon cycle (Yu et al 2022), and their composition, structure, and characterization are interfered by biochar (Cai et al 2021;Deshoux et al 2023). Besides, periodic high and low tides keep the salt marshes in alternating wet and dry conditions, which affects the microbial community (Yin and Yan 2020).…”

Section: Introductionmentioning

confidence: 99%

Biochar mitigates the mineralization of allochthonous organic matter and global warming potential of saltmarshes by influencing functional bacteria

Zhang,

Huang,

et al. 2024

Carbon Res.

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Saltmarshes are suffering from severe degradation due to anthropogenic activities, leading to the loss of blue carbon and greenhouse gas (GHG) emissions. Given the significant potential of biochar in mitigating climate change, adding biochar to saltmarshes would alleviate this situation. This study investigated the effects of different biochar (made from Spartina alterniflora, corn straw, and Laminaria japonica) and their aged biochar on the carbon fraction contents, GHG emissions, and microbial community structure of saltmarsh soils with allochthonous organic matter (Enteromorpha prolifera) addition. After 60 days of incubation, total organic carbon (TOC) loss and global warming potential (GWP) of biochar-amended soils were reduced by 67.29–124.33% and 4.91–123.24%, respectively (p < 0.05). Biochar reduced the proportion of labile carbon (dissolved organic carbon (DOC) and microbial biomass carbon (MBC)) in organic carbon by 61.92–86.15% (p < 0.05). In addition, biochar reduced the relative abundance of specific functional bacteria (inc. cellulolysis, aromatic compound degradation, and xylanolysis) involved in organic carbon decomposition by 20.02–37.82% (p < 0.05). These results suggest that even in the presence of high levels of liable organic matter, the application of biochar to saltmarshes has a sustained effect in promoting carbon accumulation and reducing GHG emissions, and this effect is regulated by a decrease of functional bacteria associated with carbon metabolism. Therefore, the in situ study of biochar on restoring carbon sink function of saltmarshes is proposed for practical engineering in future. Graphical Abstract

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Effects of biochar on soil microbial communities: A meta-analysis

Cited by 27 publications

References 280 publications

Microbial mechanisms of organic matter mineralization induced by straw in biochar-amended paddy soil

Microbial mechanisms of organic matter mineralization induced by straw in biochar-amended paddy soil

Soil Microbiome: Diversity, Benefits and Interactions with Plants

Biochar mitigates the mineralization of allochthonous organic matter and global warming potential of saltmarshes by influencing functional bacteria

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