Biochar's role as an electron shuttle for mediating soil N2O emissions

Yuan, Huairui; Zhang, Zhijun; Li, Mengya; Clough, Tim J.; Wrage‐Mönnig, Nicole; Qin, Shuping; Ge, Tida; Liao, Hanpeng; Zhou, Shungui

doi:10.1016/j.soilbio.2019.03.002

Cited by 66 publications

(36 citation statements)

References 17 publications

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“…During soil weathering, BC undergoes a wide range of physical and chemical transformations that differ from those obtained by chemical treatments (such as our modified BC (BC-OlvM) or H 2 O 2 -treated BCs (Yuan et al . 2019 ). Therefore, caution needs to be taken when extrapolating the results from chemically-altered BCs to aged BCs.…”

Section: Resultsmentioning

confidence: 99%

“…2019 ; Yuan et al . 2019 ). When applied to soils, BC can affect N 2 O dynamics through abiotic and/or biotic mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the role of BC redox reactions for influencing N 2 O emissions has not been experimentally verified with pure cultures of denitrifying bacteria or soil matrices yet (Yuan et al . 2019 ). The main difficulty in determining the role of BC during denitrification processes lies in its complex properties.…”

Section: Introductionmentioning

confidence: 99%

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Biochar as electron donor for reduction of N2O by Paracoccus denitrificans

Pascual

Sánchez-Monedero

Cayuela

et al. 2020

FEMS Microbiology Ecology

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Biochar (BC) has been shown to influence microbial denitrification and mitigate soil N2O emissions. However, it is unclear if BC is able to directly stimulate the microbial reduction of N2O to N2. We hypothesized that the ability of BC to lower N2O emissions could be related not only to its ability to store electrons, but to donate them to bacteria that enzymatically reduce N2O. Therefore, we carried out anoxic incubations with Paracoccus denitrificans, known amounts of N2O, and nine contrasting BCs, in the absence of any other electron donor or acceptor. We found a strong and direct correlation between the extent and rates of N2O reduction with BC's EDC/EEC (electron donating capacity/electron exchange capacity). Apart from the redox capacity, other BC properties were found to regulate the BC's ability to increase N2O reduction by P. denitrificans. For this specific BC series, we found that a high H/C and ash content, low surface area and poor lignin feedstocks favored N2O reduction. This provides valuable information for producing tailored BCs with the potential to assist and promote the reduction of N2O in the pursuit of reducing this greenhouse gas emissions.

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Section: Resultsmentioning

confidence: 99%

“…2019 ; Yuan et al . 2019 ). When applied to soils, BC can affect N 2 O dynamics through abiotic and/or biotic mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Biochar as electron donor for reduction of N2O by Paracoccus denitrificans

Pascual

Sánchez-Monedero

Cayuela

et al. 2020

FEMS Microbiology Ecology

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“…The examples include the stimulated microbial reduction of Fe(III) oxyhydroxide mineral ferrihydrite by biochar (Kappler et al 2014) and the suppression of N 2 O emission in biochar-amended soils (Harter et al 2014). The oxidized biochar by H 2 O 2 increased soil N 2 O emission rates, again indicating the suppressive effect of biochar redoxactive moieties on N 2 O emissions from soil denitrification (Yuan et al 2019).…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Association of biochar properties with changes in soil bacterial, fungal and fauna communities and nutrient cycling processes

Dai

Xiong

Zhu

et al. 2021

Biochar

135

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Soil microorganisms play crucial roles in soil nutrient cycling, carbon sequestration, fertility maintenance and crop health and production. To date, the responses of microorganisms, such as microbial activity, diversity, community structure and nutrient cycling processes, to biochar addition have been widely reported. However, the relationships between soil microbial groups (bacteria, fungi and microscopic fauna) and biochar physicochemical properties have not been summarized. In this review, we conclude that biochar affects soil microbial growth, diversity and community compositions by directly providing growth promoters for soil biota or indirectly changing soil basic properties. The porous structure, labile C, high pH and electrochemical properties of biochar play an important role in determining soil microbial abundance and communities, and their mediated N and P cycling processes, while the effects and underlying mechanisms vary with biochar types that are affected by pyrolysis temperature and feedstock type. Finally, we highlight some issues related to research methodology and subjects that are still poorly understood or controversial, and the perspectives for further research in microbial responses to biochar addition.

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“…Furthermore, the electrical conductivity structure of biochar produced at high-temperature promoted N 2 O reduction. The biochar function as an electron shuttle tends to decrease or even suppress soil N 2 O emission inversely to the biochar ageing [41]. However, the mechanisms involved in the modification of nitrification and denitrification genes caused by biochar application to soil are not fully elucidated [42].…”

Section: Biochar As An Electron Shuttle and Its Influence On N 2 O Emmentioning

confidence: 99%

Role of biochar in promoting circular economy in the agriculture sector. Part 1: A review of the biochar roles in soil N, P and K cycles

Jindo

Audette

Higashikawa

et al. 2020

Chem. Biol. Technol. Agric.

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Recently, biochar has been widely used for versatile applications in agriculture and environment sectors as an effective tool to minimise waste and to increase the efficiency of circular economy. In the present work, we review the current knowledge about biochar role in N, P and K cycles. Ammonia volatilisation and N 2 O emission can be reduced by biochar addition. The content of available P can be improved by biochar through enhancement of solubilisation and reduction in P fixation on soil mineral, whilst high extractable K in biochar contributes to K cycle in soil. Liming effect and high CEC are important properties of biochars improving beneficial interactions with N, P and K soil cycle processes. The effectiveness of biochar on N, P and K cycles is associated with biochar properties which are mainly affected by feedstock type and pyrolysis condition.

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Biochar's role as an electron shuttle for mediating soil N2O emissions

Cited by 66 publications

References 17 publications

Biochar as electron donor for reduction of N2O by Paracoccus denitrificans

Biochar as electron donor for reduction of N2O by Paracoccus denitrificans

Association of biochar properties with changes in soil bacterial, fungal and fauna communities and nutrient cycling processes

Role of biochar in promoting circular economy in the agriculture sector. Part 1: A review of the biochar roles in soil N, P and K cycles

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