Biochar-induced negative carbon mineralization priming effects in a coastal wetland soil: Roles of soil aggregation and microbial modulation
Open accessAbstract
Biochar can sequestrate carbon (C) in soils and affect native soil organic carbon (SOC) mineralization via priming effects. However, the roles of soil aggregation and microbial regulation in priming effects of biochars on SOC in coastal wetland soils are poorly understood. Thus, a coastal wetland soil (δ 13 C -22‰) was separated into macro-micro aggregates (53-2000μm, MA) and silt-clay fractions (<53μm, SF) to investigate the priming effect using two 13 C enriched biochars produced from corn straw (δ 13 C -11.58‰) at 350 and 550°C. The two biochars induced negative priming effect on the native SOC mineralization in the both soil aggregate size fractions, attributed to the enhanced stability of the soil aggregates resulting from the intimate physico-chemical associations between the soil minerals and biochar particles. Additionally, biochar amendments increased soil microbial biomass C and resulted in a lower metabolic quotient, suggesting that microbes in biochar amended aggregates could likely incorporate biomass C rather than mineralize it. Moreover, the biochar amendments induced obvious shifts of the bacterial community towards low C turnover bacteria taxa (e.g., Actinobacteria and Deltaproteobacteria) and the bacteria taxa responsible for stabilizing soil aggregates (e.g., Actinobacteria and Acidobacteria), which also accounted for the negative priming effect. Overall, these results suggested that biochar had considerable merit for stabilizing SOC in the coastal soil and thus has potential to restore and/or enhance "blue C" sink in the degraded coastal wetland ecosystem.
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In a coastal wetland soil, biochar application boosted the soil microbial biomass carbon and resulted in a low metabolic quotient.
“For example, in a coastal wetland soil, biochar application boosted the soil microbial biomass C and resulted in a low metabolic quotient (Zheng et al. 2018).”
From Biochar and its importance on nutrient dynamics in soil and plant (2020) · cites this paper as Zheng et al. 2018
Biochar application shifted the bacterial community towards low carbon turnover bacterial taxa, which stabilised soil aggregates.
“Zheng et al. (2018) also found a shift of the bacterial community towards low C turnover bacterial taxa (e.g., Actinobacteria and Deltaproteobacteria), which stabilised soil aggregates.”
From Biochar and its importance on nutrient dynamics in soil and plant (2020) · cites this paper as Zheng et al. 2018
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Biochar and its importance on nutrient dynamics in soil and plant
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- Authors
- Zheng, H., Wang, X., Luo, X., Wang, Z., & Xing, B.
- Affiliations
- Ocean University of China (CN)
- Jiangnan University (CN)
- University of Massachusetts Amherst (US)
- Corresponding author
- Luo, Xianxiang
- Xing, Baoshan
- Venue
- Science of The Total Environment
- Publisher
- Elsevier BV
- Published
- 2018-01
- Volume
- 610-611
- Pages
- 951-960
- ISSN
- 0048-9697 (ISSN-L)
- OpenAlex
- W2748177257
- Cited by
- 277
- References
- 51
- Citations by year
- 2026: 27 · 2025: 38 · 2024: 41 · 2023: 42 · 2022: 28 · 2021: 38 · 2020: 29 · 2019: 26 · 2018: 7 · 2017: 1
- FWCI
- 18.90
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- The Science of The Total Environment (acceptedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (41573089)
- National Natural Science Foundation of China-Shandong Joint Fund for Marine Science Research Centers (U1406403)
- Taishan Scholars Program of Shandong Province (tshw20130955)
- Natural Science Foundation of Shandong Province (ZR2014DQ011)
- USDA NIFA McIntire-Stennis Program (MAS 00028)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Physical Sciences › Environmental Science › Ecology › Peatlands and Wetlands Ecology
- Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
- Keywords
- biochar, soil organic carbon mineralization, priming effect, coastal wetland soils, soil aggregation, soil aggregate size fractions, soil microbial biomass carbon, metabolic quotient, bacterial community composition, soil carbon sequestration, blue carbon, corn straw biochar, soil carbon stability
- MeSH terms
- Carbon, Charcoal, China, Soil, Soil Microbiology, Wetlands
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