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Microbially Driven Iron Cycling Facilitates Organic Carbon Accrual in Decadal Biochar-Amended Soil.
He, Haohua; Liu, Jie; Shu, Zhipeng; Chen, Yalan; Pan, Zezhen; Peng, Chao; Wang, Xingxing; Zhou, Fengwu; Zhou, Ming; Du, Zhangliu; Sun, Ke; Xing, Baoshan; Wang, Zimeng.
Afiliación
  • He H; Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
  • Liu J; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
  • Shu Z; Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
  • Chen Y; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
  • Pan Z; Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
  • Peng C; National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Eco-Chongming, Shanghai 200062, China.
  • Wang X; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200433, China.
  • Zhou F; College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China.
  • Zhou M; Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
  • Du Z; Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
  • Sun K; Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
  • Xing B; Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
  • Wang Z; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
Environ Sci Technol ; 58(28): 12430-12440, 2024 Jul 16.
Article en En | MEDLINE | ID: mdl-38968084
ABSTRACT
Soil organic carbon (SOC) is pivotal for both agricultural activities and climate change mitigation, and biochar stands as a promising tool for bolstering SOC and curtailing soil carbon dioxide (CO2) emissions. However, the involvement of biochar in SOC dynamics and the underlying interactions among biochar, soil microbes, iron minerals, and fresh organic matter (FOM, such as plant debris) remain largely unknown, especially in agricultural soils after long-term biochar amendment. We therefore introduced FOM to soils with and without a decade-long history of biochar amendment, performed soil microcosm incubations, and evaluated carbon and iron dynamics as well as microbial properties. Biochar amendment resulted in 2-fold SOC accrual over a decade and attenuated FOM-induced CO2 emissions by approximately 11% during a 56-day incubation through diverse pathways. Notably, biochar facilitated microbially driven iron reduction and subsequent Fenton-like reactions, potentially having enhanced microbial extracellular electron transfer and the carbon use efficiency in the long run. Throughout iron cycling processes, physical protection by minerals could contribute to both microbial carbon accumulation and plant debris preservation, alongside direct adsorption and occlusion of SOC by biochar particles. Furthermore, soil slurry experiments, with sterilization and ferrous iron stimulation controls, confirmed the role of microbes in hydroxyl radical generation and biotic carbon sequestration in biochar-amended soils. Overall, our study sheds light on the intricate biotic and abiotic mechanisms governing carbon dynamics in long-term biochar-amended upland soils.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Microbiología del Suelo / Carbono / Hierro Idioma: En Revista: Environ Sci Technol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Microbiología del Suelo / Carbono / Hierro Idioma: En Revista: Environ Sci Technol Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos