Contrasting emissions of carbon-based greenhouse gases from two paddy soils under submerged conditions as affected by biochar addition

Nguyen, Binh Thanh; Dong, Hao; Le, Long Ba; Thai, Nam Van

doi:10.1007/s12665-023-10874-7

Environ Earth Sci

2023

DOI: 10.1007/s12665-023-10874-7

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Contrasting emissions of carbon-based greenhouse gases from two paddy soils under submerged conditions as affected by biochar addition

Binh Thanh Nguyen

Hao Dong

Long Ba Le

et al.

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2024

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Cited by 2 publications

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Potential of biochar to mitigate methane production in paddy soils—application of a new incubation and modelling approach

Middelanis,

Looschelders,

Mueller

et al. 2024

Biogeochemistry

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Paddy soils are a significant source of methane (CH4) affecting the global climate. Therefore, it is important to investigate both emission mitigation strategies and the underlying biogeochemical processes. The application of biochar into paddy soils has emerged as a promising measure to mitigate CH4 emissions. However, it has not yet been clarified why such effects are usually weaker in field studies than in laboratory incubations and which properties of biochar specifically decrease the production of CH4. We conducted two incubation experiments, one with 1.5% addition of untreated biochars and one with same amounts, but pH-levelled, rinsed biochars. According to the common experimental design of existing incubation studies (experiment 1) biochar addition induced a mean soil pH increase of 0.28 after anaerobic incubation compared to the contro. In these treatments, biochar significantly extended the pre-methanogenic stage (mean 24.23%). However, this effect was weakened or even reversed when pH-levelled, rinsed biochars were amended in experiment 2, which was intended to mimic the persistent long-term effects in the field. This indicated that the provision of electron accepting capacities to suppress methanogenesis may be less important than previously thought. The addition of biochar significantly lowered CH4 production rates m in both experiments with no significant influence of the pH (mean 25.89%), though. Our study demonstrated that incubation studies on CH4 production in paddy soils can be improved by separating the pre-methanogenic and the methanogenic stage. This facilitates future research to compare characteristics of biochar, but also combinations of measures to optimise CH4 mitigation strategies.

show abstract

Potential of biochar to mitigate methane production in paddy soils—application of a new incubation and modelling approach

Middelanis,

Looschelders,

Mueller

et al. 2024

Biogeochemistry

View full text Add to dashboard Cite

show abstract

Effects of Sediment Microbial Fuel Cells on CH<sub>4</sub> and CO<sub>2</sub> Emissions from Straw Amended Paddy Soil

Bekele,

Maeda,

Akao

et al. 2024

J. of Wat. & Envir. Tech.

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Contrasting emissions of carbon-based greenhouse gases from two paddy soils under submerged conditions as affected by biochar addition

Cited by 2 publications

References 51 publications

Potential of biochar to mitigate methane production in paddy soils—application of a new incubation and modelling approach

Potential of biochar to mitigate methane production in paddy soils—application of a new incubation and modelling approach

Effects of Sediment Microbial Fuel Cells on CH<sub>4</sub> and CO<sub>2</sub> Emissions from Straw Amended Paddy Soil

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