Biochar decreases methanogenic archaea abundance and methane emissions in a flooded paddy soil

Qi, Le; Ma, Zilong; Chang, Scott X.; Zhou, Peng; Huang, Rong; Wang, Yingyan; Wang, Zifang; Gao, Ming

doi:10.1016/j.scitotenv.2020.141958

Cited by 44 publications

(13 citation statements)

References 51 publications

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“…Biochar has been well-reported to mitigate CH 4 emissions from paddy soil (Dong et al 2021;Jiang et al 2021;Qi et al 2021b). The mechanisms of CH 4 emission mitigation by biochar mainly included: (i) biochar inhibited the activity and abundance of methanogens but stimulated those of methanotrophs (Nan et al 2021); (ii) biochar increased the adsorption of CH 4 in soil .…”

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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“…For example, when the gasification chamber temperature, the detector temperature and the make-up gas flow were 100 • C, 200 • C and 22 mL min −1 , respectively, the column chamber temperature was increased from 60 • C to 100 • C at 10 • C intervals (including 80 • C). The variables involved in the four parameters were as follows: column chamber temperature (60, 70, 80, 90 and 100 • C); gasification chamber temperature (80, 90, 100, 110 and 120 • C); detector temperature (180,190,200, 210 and 220 • C); make-up flow rate (24,23,22,21,20 and 19 mL min −1 ).…”

Section: Exploring the Conditions In The Splitless Modementioning

confidence: 99%

“…Therefore, with the increase of rice cultivation, how to effectively reduce the GHG emissions in the process of rice cultivation has gradually become a hot concern for scholars all over the world [23]. For example, Qi Le et al [24] concluded that the application of biochar would reduce the abundance of methanogenic archaea in flooded paddy soil, thus reducing the emission of CH 4 . In that research, the GC was connected to an automatic air intake device, allowing direct measurement of methane gas collected by the automatic intake device.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Detection of Methane Gas in Rice Cultivation by Gas Chromatography-Flame Ionization Detector Based on Manual Injection and Split Pattern

et al. 2022

Molecules

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Rice cultivation is one of the most significant human-created sources of methane gas. How to accurately measure the methane concentration produced by rice cultivation has become a major problem. The price of the automatic gas sampler used as a national standard for methane detection (HJ 38-2017) is higher than that of gas chromatography, which greatly increases the difficulty of methane detection in the laboratory. This study established a novel methane detection method based on manual injection and split pattern by changing the parameters of the national standard method without adding any additional automatic gas samplers. The standard curve and correlation coefficient obtained from the parallel determination of methane standard gas were y = 2.4192x + 0.1294 and 0.9998, respectively. Relative standard deviation (RSD, <2.82%), recycle rate (99.67–102.02%), limit of detection (LOD, 0.0567 ppm) and limit of quantification (LOQ, 0.189 ppm) of this manual injection method are satisfying, demonstrating that a gas chromatography-flame ionization detector (GC-FID), based on manual injection at a split ratio (SR) of 5:1, could be an effective and accurate method for methane detection. Methane gases produced by three kinds of low-methane rice treated with oxantel pamoate acid, fumaric acid and alcohol, were also collected and detected using the proposed manual injection approach Good peak shapes were obtained, indicating that this approach could also be used for quantification of methane concentration.

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“…Expect for India (about 7.4 Tg yr -1 ), the largest CH 4 emissions are found in China (about 6.2 Tg yr -1 ), which contributes to about 21% of the total global budget from paddy fields (Carlson et al, 2016). Therefore, paddy fields in China play a critical role in the global carbon cycle (Qi et al, 2021), and exploring the mechanism of CH 4 production and CH 4 emission reduction from paddy fields is an important part of the current carbon neutrality in China.…”

Section: Introductionmentioning

confidence: 99%

Differences in methanogenic pathways and methanogenic communities in paddy soils under three typical cropping modes

Shen

Huang

et al. 2023

Preprint

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Microbial methane (CH4) production varies among different cropping modes,which has important implications for how to reduce CH4 emissions from paddy fields.However,little is known about the values of anaerobically produced δ13CH4,methanogenic pathways,and their dominant communities in different paddy soils.Through anaerobic incubation experiments and the stable carbon isotope with fluoromethane inhibitor method,CH4 production potential (MPP), the relative contribution of acetoclastic methanogenesis(fac),and the abundance and community composition of methanogens in paddy soils were measured under three typical cropping modes (Rice-Wheat,RW;Rice-Fallow,RF;Double-Rice,DR) in China. The results showed that MPP was 30.7 μg CH4 g–1 d–1 in DR soil,57% and 66% higher than that in RW and RF soils,respectively,possibly due to the lower pH and higher abundance of mcrA genes. Moreover,RF soil had the highest produced δ13CH4 value(–43.9‰) and the lowest produced δ13CO2 value(–26.3‰). Based on the carbon isotope fractionations associated with H2/CO2-dependent methanogenesis(1.049–1.062), the values of fac estimated in RF soil(80–98%)were much higher than that in RW(39–60%) and DR(52–75%) soils. It might be supported by that the Methanosarcina (acetoclastic methanogens) were dominant in RF soil while Methanosarcina and Methanobacterium(hydrogenotrophic methanogens) dominated in RW and DR soils. Redundancy analysis revealed that the community structure of methanogens was significantly affected by soil pH,indicating that the differences in methanogenic pathways under the three typical cropping modes might be caused by the changes in community composition driven by soil pH. The findings suggest that soil pH-induced methanogenic abundance and community composition drive paddy MPP and methanogenic pathways, which would provide important insights into the CH4 reduction in paddies.

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Biochar decreases methanogenic archaea abundance and methane emissions in a flooded paddy soil

Cited by 44 publications

References 51 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

Low-Cost Detection of Methane Gas in Rice Cultivation by Gas Chromatography-Flame Ionization Detector Based on Manual Injection and Split Pattern

Differences in methanogenic pathways and methanogenic communities in paddy soils under three typical cropping modes

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