Responses of soil microbial community structure changes and activities to biochar addition: A meta-analysis

Zhang, Leiyi; Jing, Yiming; Xiang, Yangzhou; Zhang, Renduo; Lü, Haibo

doi:10.1016/j.scitotenv.2018.06.231

Cited by 177 publications

(108 citation statements)

References 74 publications

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“…It is well-acknowledged that soil microorganisms play crucial roles in the plant-soil system via supporting the stability, sustainability, and productivity of soil ecosystems [16][17][18]. On the one hand, straw input can directly provide an improved habitat and effective energy source to stimulate soil microbial growth and reproduction [2].…”

Section: Introductionmentioning

confidence: 99%

Straw input can parallelly influence the bacterial and chemical characteristics of maize rhizosphere

Jun

et al. 2020

Environmental Pollutants and Bioavailability

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The effects of straw input, including three strategies: chopped straw, straw-derived compost and biochar, on bacterial communities and chemical composition in maize rhizosphere were investigated according to a three-year field experiment. Illumina MiSeq sequencing showed that biochar input increased bacterial richness but decreased bacterial diversity in rhizosphere when compared with the results from no straw control. The functional prediction of Kyoto Encyclopedia of Genes and Genome pathways confirmed that soil subjected to straw input changed the abundance of microbiomes involved in carbohydrate metabolism significantly. Metabolomics analysis showed that straw input changed the metabolite profile of the rhizosphere soil of maize, which was most evident in the treatment of chopped-straw input. The match between the global metabolic profiles and bacterial distribution patterns was weak by performing Procrustes analysis (m 2 = 0.851, R = 0.386, P < 0.05). However, the associations between the special members of genera, predicted function involved in carbohydrate metabolism, and rhizosphere metabolites, including sugars and organic acid, were significant (P < 0.05).

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Section: Introductionmentioning

confidence: 99%

Straw input can parallelly influence the bacterial and chemical characteristics of maize rhizosphere

Jun

et al. 2020

Environmental Pollutants and Bioavailability

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“…At the genus level (Fig., 2B), the soil samples showed similar bacterial community compositions, with the dominant genera being Mucilaginibacter (9.4–13.8%), Rhodanobacter (6.7–12.3%), Massilia (7.2–10.7%), Dyella (6.4–8.8%), Sphingomonas (4.9–5.9%), Rhizomicrobium (3.1–6.5%), Paraburkholderia (2.8–5.1%), Gemmatimonas (2.6–2.8%) and Pseudarthrobacter (1.1–2.2%). Although their relative abundances shifted in response to the additives probably because of soil property alteration and competition between exogenous bacteria and native microbiota (Zhang et al ., ), these taxa still dominated under all treatments, suggesting that the additives had a limited impact on the ecological niche of the bacterial community in the soils.…”

Section: Resultsmentioning

confidence: 93%

“…Microbial community structure is critical for the maintenance of the health and stability of soil ecosystems because of the key role of various microorganisms in matter cycling and ecosystem service supply in soil (Wu et al ., ; Fischer et al ., ). Additionally, the microbial community can serve as a bioindicator of environmental variation (Castro et al ., ; Zhang et al ., ). Hg pollution and the introduction of exogenous biomaterials for remediation such as biochar and microorganisms may influence and even disturb the soil microecosystem by changing soil properties and breaking the original microbial niche (Mahbub et al ., ; Zhang et al ., ).…”

Section: Introductionmentioning

confidence: 97%

“…Additionally, the microbial community can serve as a bioindicator of environmental variation (Castro et al ., ; Zhang et al ., ). Hg pollution and the introduction of exogenous biomaterials for remediation such as biochar and microorganisms may influence and even disturb the soil microecosystem by changing soil properties and breaking the original microbial niche (Mahbub et al ., ; Zhang et al ., ). Thus, the function and stability of the soil ecosystem may be adversely impacted, leading to some ecological risk.…”

Section: Introductionmentioning

confidence: 97%

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Reduction in Hg phytoavailability in soil using Hg‐volatilizing bacteria and biochar and the response of the native bacterial community

Chang

Qinye

Dong

et al. 2019

Microbial Biotechnology

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Summary Biological approaches are considered promising and eco‐friendly strategies to remediate Hg contamination in soil. This study investigated the potential of two ‘green’ additives, Hg‐volatilizing bacteria (Pseudomonas sp. DC‐B1 and Bacillus sp. DC‐B2) and sawdust biochar, and their combination to reduce Hg(II) phytoavailability in soil and the effect of the additives on the soil bacterial community. The results showed that the Hg(II) contents in soils and lettuce shoots and roots were all reduced with these additives, achieving more declines of 12.3–27.4%, 24.8–57.8% and 2.0–48.6%, respectively, within 56 days of incubation compared to the control with no additive. The combination of DC‐B2 and 4% biochar performed best in reducing Hg(II) contents in lettuce shoots, achieving a decrease of 57.8% compared with the control. Pyrosequencing analysis showed that the overall bacterial community compositions in the soil samples were similar under different treatments, despite the fact that the relative abundance of dominant genera altered with the additives, suggesting a relatively weak impact of the additives on the soil microbial ecosystem. The low relative abundances of Pseudomonas and Bacillus, close to the background levels, at the end of the experiment indicated a small biological disturbance of the local microbial niche by the exogenous bacteria.

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“…Application of biochar, a soil amendment created by pyrolyzing biomass at a range of temperatures (350-1000 • C), resulting in a carbon-rich, recalcitrant material that can persist in the soil for centuries [12,13], has been shown to reduce SIN [3], potentially forcing alfalfa to rely more on BNF for N requirements and thus leading to increased input of biologically-fixed N. The pathways for lower SIN with biochar addition include both biotic and abiotic mechanisms. Biochar-induced increases in microbial activity [3] and in the bacterial to fungal ratio, which is more often found in high pH soils and with low biochar application rates [14], may lead to higher immobilization of inorganic N, due to greater N requirements by larger microbial communities, and by bacteria relative to fungi due to bacteria's lower biomass C:N ratio. Additionally, the high surface area and porous nature of biochar allows for chemi-and physi-sorption of N compounds, respectively [3,12].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Dynamics in an Established Alfalfa Field under Low Biochar Application Rates

et al. 2019

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Sustainable nitrogen (N) management in agroecosystems is crucial for supporting crop production and reducing deleterious N losses. Biochar application with N-fixing legumes offers promise for increasing soil N retention and input. Strategic, low application rates (112 kg ha−1) of pine and coconut feedstock biochars were tested in an established alfalfa (Medicago sativa) field. Soil inorganic N and plant growth, N concentrations, and δ15N were monitored over a growing season to follow mineral N availability, and plant N uptake and sourcing. Microbial and gene abundance and enzyme activity were measured to assess the potential for N cycling processes to occur. Biochar application had minimal effects on measured parameters. However, significant temporal dynamics in N cycling and correlations between alfalfa δ15N and soil N availability indicate differing plant N sourcing over time. Our findings indicate that low application rates of biochar in established alfalfa fields do not significantly affect N cycling, and that managing alfalfa to maximize N fixation, for example by intercropping, may be a better solution to increase N stocks and retention in this system. To determine when biochar can be beneficial for alfalfa N cycling, we need additional research to assess various economically-feasible biochar application rates at different alfalfa growth stages.

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Responses of soil microbial community structure changes and activities to biochar addition: A meta-analysis

Cited by 177 publications

References 74 publications

Straw input can parallelly influence the bacterial and chemical characteristics of maize rhizosphere

Straw input can parallelly influence the bacterial and chemical characteristics of maize rhizosphere

Reduction in Hg phytoavailability in soil using Hg‐volatilizing bacteria and biochar and the response of the native bacterial community

Nitrogen Dynamics in an Established Alfalfa Field under Low Biochar Application Rates

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