Identification and verification of key functional groups of biochar influencing soil N2O emission

Yuan, Dan; Yuan, Huairui; He, Xiaodong; Hu, Huixian; Qin, Shuping; Clough, Tim J.; Wrage‐Mönnig, Nicole; Luo, Junyu; He, Xinhua; Chen, Man; Zhou, Shungui

doi:10.1007/s00374-021-01541-9

Cited by 29 publications

(11 citation statements)

References 45 publications

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“…The microbial reduction of N 2 O to N 2 could result from an increased expression of denitrification-associated functional genes (e.g., nosZ, nirK, nirK, and narG) (Deng et al 2021a;Liao et al 2021;Wu et al 2021b). Additionally, biochar could act as an electron shuttle to facilitate electron transfer and N 2 O reduction through biochar's O-containing functional groups and carbon matrices (Yuan et al 2021;Zhao et al 2021c). It is important to note that the positive effects of biochar on denitrification metabolism could be elucidated at the cellular level by integrating physiological and multi-omics (proteomic and metabolomics) analyses (Zhang et al 2021g).…”

Section: Biochar For Global Climate Change Mitigationmentioning

confidence: 99%

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Singh

Wang

et al. 2023

Biochar

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As a bioproduct from the thermal decomposition of biomass, biochar has various applications in diversified field. In this study, a bibliometric analysis was conducted to visualize the current research status and trends of biochar research. A total of 5535 documents were collected from the Web of Science Core Collection and subjected to visualization analysis for the biochar field's development in 2021 with CiteSpace software. The visual analysis results demonstrate that the number of publications expanded dramatically in 2021, and the growth trend would continue. China and USA were the most contributing countries in biochar research in terms of the number of publications. Based on the keyword co-occurrence analyses, “Biochar for toxic metal immobilization”, “Biochar-based catalyst for biofuel production”, “Biochar for global climate change mitigation”, “Biochar for salinity and drought stress amelioration”, “Biochar amendment in composting”, and “Biochar as additives in anaerobic digestion” were the main research trends and hotspots in this field in 2021. This indicates that the biochar research was multidisciplinary. Regarding the research hotspots, the employment of biochar as heterogeneous catalysts for biofuel production gained great attention in 2021. On the contrary, bioremediation using functional bacteria immobilized on biochar and biochar-assisted advanced oxidation process were well-studied but with less frequency than other topics in 2021. Furthermore, the future research was proposed for green and sustainable applications of biochar. This review provides a comprehensive overview of the research frontiers, the evolution of research hotspots, and potential future research directions in the biochar field. Graphical Abstract

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Section: Biochar For Global Climate Change Mitigationmentioning

confidence: 99%

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Singh

Wang

et al. 2023

Biochar

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“…30 The N 2 O concentration in the headspace was analyzed using a robotized system; the details of the procedures were described in a previous study. 31,32 The N 2 O in the aqueous phase was calculated based on Herry's Law. The total N 2 O concentration in the sample was obtained by dividing the total amount of N Real-Time Quantitative PCR Analysis.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…The concentration of NO 3 – was measured using a dual-wavelength method . The N 2 O concentration in the headspace was analyzed using a robotized system; the details of the procedures were described in a previous study. , The N 2 O in the aqueous phase was calculated based on Herry’s Law. The total N 2 O concentration in the sample was obtained by dividing the total amount of N 2 O in both the gas and liquid phases by the total weight of the soil/sediment.…”

Section: Methodsmentioning

confidence: 99%

“…These samples were collected at day 6, immediately frozen at −80 °C, and sent to Ovison Gene Technology Co. (Beijing, China) for the microbial community structure and denitrification gene expression ( narG and nosZ ) analysis. The 16S V3–V4 region was amplified using the primers 319F (5′-GTACTCCTACGGAGGCAGCA-3′) and 806R (5′GTGGACTACHVGGGTWTCTAAT-3′) …”

Section: Methodsmentioning

confidence: 99%

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Reactive Oxygen Species Promote Nitrous Oxide (N₂O) Emissions from Soil/Sediment during the Anoxic–Oxic Transition

Chen

Yang

Zeng

et al. 2022

Environ. Sci. Technol.

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Reactive oxygen species (ROS)-induced element/pollutant geochemical processes in fluctuating anoxic−oxic areas have received increasing attention in recent years. Nitrous oxide (N 2 O) is a strong greenhouse gas; however, the relationship between ROS and N 2 O emissions in these areas has not been established. This work revealed the essential role of ROS in promoting N 2 O emissions in soil/sediment during the anoxic−oxic transition. ROS decreased the rate of nitrate reduction by 26−31% and increased N 2 O emissions by 8.8−31.3% (at 48 h). ROS-induced N 2 O emission was via inhibiting the step of N 2 O reduction. During the anoxic−oxic transition, the contribution of ROS to inhibit the step of N 2 O reduction was higher than 52.6%, demonstrating the important role of ROS. The downregulated relative transcription of the NosZ gene demonstrated inhibition at the gene level. Hydrogen peroxide was the dominant ROS species inhibiting N 2 O reduction, while the role of hydroxyl radicals was negligible, suggesting a different behavior of N 2 O emission with common pollutant conversion induced by ROS during the anoxic− oxic transition. This study demonstrated an overlooked factor in promoting N 2 O emission in the soil/sediment and appealed to a reexamination of the mechanism of N 2 O emissions in fluctuating anoxic−oxic areas.

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“…Biochar research needs to move from descriptive to mechanistic. For example, linking the effects of biochar on nitrous oxide (N 2 O) emissions to changes in the composition of bacteria communities responsible for denitrification (Lévesque et al 2020) to the composition of functional groups of biochar (Yuan et al 2021), or to variations in N 2 O-producing processes and related functional microbes (Duan et al 2018), provides an understanding of the mechanisms involved in changes in N 2 O emissions. Mechanistic understanding gained from biochar research will allow us to extrapolate findings from one site to another.…”

Section: Biochar Research As With Any Other Line Of Researchmentioning

confidence: 99%

Recommendations for stronger biochar research in soil biology and fertility

Cai

Lehmann

et al. 2021

Biol Fertil Soils

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Research on biochar, a product from the pyrolysis of biomass under limited or no oxygen conditions, has gained momentum in developing applications in areas ranging from improvement of soil fertility to pollution remediation, and from mitigation of climate change to use in the manufacturing of healthcare products such as supercapacitors (Ok et al. 2015; Wu et al. 2019). The burgeoning interest in biochar applications followed some of the early work on using biochar as a soil amendment (the current use of the biochar concept) (Woods et al. 2006). The number of publications with the term "biochar" (whether biochar as a soil amendment or a fuel) in the title, abstract, or keywords has gone from just one publication in 1998 to 3210 in 2020, based on a search on Web of Science (accessed on February 1, 2021). Glaser et al. (2002), published in Biology and Fertility of Soils (BFSO), provided one of the earliest studies on the subject by reviewing the effect of combustion procedures on the physical and chemical properties of biochar (using the term "charcoal" at the time). Five papers published in 2007 that dealt with biochar's environmental applications stood out as highly influential; those papers dealt with biochar as a soil amendment (Chan et al. 2007; Rondon et al. 2007; Warnock et al. 2007), or as a carbon-negative

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Identification and verification of key functional groups of biochar influencing soil N2O emission

Cited by 29 publications

References 45 publications

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Reactive Oxygen Species Promote Nitrous Oxide (N₂O) Emissions from Soil/Sediment during the Anoxic–Oxic Transition

Recommendations for stronger biochar research in soil biology and fertility

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Identification and verification of key functional groups of biochar influencing soil N2O emission

Cited by 29 publications

References 45 publications

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Bibliometric analysis of biochar research in 2021: a critical review for development, hotspots and trend directions

Reactive Oxygen Species Promote Nitrous Oxide (N2O) Emissions from Soil/Sediment during the Anoxic–Oxic Transition

Recommendations for stronger biochar research in soil biology and fertility

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Reactive Oxygen Species Promote Nitrous Oxide (N₂O) Emissions from Soil/Sediment during the Anoxic–Oxic Transition