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Functional response of the soil microbial community to biochar applications

Xu, Wenhuan and Whitman, William B. and Gundale, Michael and Chien, Chuan-Chi and Chiu, Chih‐Yu (2021). Functional response of the soil microbial community to biochar applications. GCB Bioenergy. 13 , 269-281
[Research article]

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Abstract

Biochar has the potential to mitigate the impacts of climate change and soil degradation by simultaneously sequestering C in soil and improving soil quality. However, the mechanism of biochar's effect on soil microbial communities remains unclear. Therefore, we conducted a global meta-analysis, where we collected 2,110 paired observations from 107 published papers and used structural equation modeling (SEM) to analyze the effects of biochar on microbial community structure and function. Our result indicated that arbuscular mycorrhizal fungal abundance, microbial biomass C, and functional richness increased with biochar addition regardless of loads, time since application, and experiment types. Results from mixed linear model analysis suggested that soil respiration and actinomycetes (ACT) abundance decreased with biochar application. With the increase of soil pH, the effect of biochar on fungal abundance and C metabolic ability was lessened. Higher biochar pH associated with higher pyrolysis temperatures reduced the abundance of bacteria, fungi, ACT, and soil microbes feeding on miscellaneous C from Biolog Eco-plate experiments. SEM that examined the effect of biochar properties, load, and soil properties on microbial community indicated that fungal abundance was the dominant factor affecting the response of the bacterial abundance to biochar. The response of bacterial abundance to biochar addition was soil dependent, whereas fungi abundance was mostly related to biochar load and pyrolysis temperature. Based on soil conditions, controlling biochar load and production conditions would be a direct way to regulate the effect of biochar application on soil microbial function and increase the capacity to sequester C.

Authors/Creators:Xu, Wenhuan and Whitman, William B. and Gundale, Michael and Chien, Chuan-Chi and Chiu, Chih‐Yu
Title:Functional response of the soil microbial community to biochar applications
Series Name/Journal:GCB Bioenergy
Year of publishing :2021
Volume:13
Page range:269-281
Number of Pages:13
Publisher:WILEY
ISSN:1757-1693
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Keywords:biochar, Biolog, C utilization, functional diversity, global meta‐analysis, PLFA, soil microbial community
URN:NBN:urn:nbn:se:slu:epsilon-p-109249
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109249
Additional ID:
Type of IDID
DOI10.1111/gcbb.12773
Web of Science (WoS)000588194200001
ID Code:19748
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:21 Dec 2020 10:43
Metadata Last Modified:21 Dec 2020 10:51

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