Intervention effectmodel-written summary

Biochar reduced CH4 and N2O emissions by 20%.

A claim from Potential and promisingness of technical options for mitigating greenhouse gas emissions from rice cultivation in Southeast Asian countries · 2019

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Biochar reduced CH4 and N2O emissions by 20%.

Treatment
biochare0
Outcome
CH4 and N2O emissionse0
Direction
reducede0
Value
20%e0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Application of biochar reduced both CH4 and N2O emissions by 20% (40% to −7%), while significantly increased rice yield by 28% (8–52%).”

✓ located verbatim in the source · abstract, characters 1011–1146

Title

Potential and promisingness of technical options for mitigating greenhouse gas emissions from rice cultivation in Southeast Asian countries

Kazuyuki Yagi; Patikorn Sriphirom; Nittaya Cha-un; et al. Soil Science & Plant Nutrition 2019. doi:10.1080/00380768.2019.1683890

Other claims from this paper (5)

Record rev-f4a8dee7e9ccf67efe8a4a6a11755a55e3f4264e16fd4d132792323100f5c335 · schema claims-v0.9 · position 4 in the model’s answer

biochar · environment: emissions · Oryza sativa (rice)Positive and negative results

25 papers: 23 positive, 2 negative or no effect

22 papers in the same direction as this claim · 2 in the opposite direction

  1. positive
    Biochar application reduced seasonal CH4 emissions by 40.6% relative to control (CT).

    Evaluation of biochar applications combined with alternate wetting and drying (AWD) water management in rice field as a methane mitigation option for farmers’ adoption · 2019 · compared with control (CT)

    Same directionCites this paper

  2. positive
    Biochar reduced annual GHG emissions by 8.01% in rice cultivation in Thailand.

    Assessment of greenhouse gas mitigation from rice cultivation using alternate wetting and drying and rice straw biochar in Thailand · 2023

    Same directionCites this paper

  3. negative
    Biochar increased methane emissions by 38% relative to controls under both regimes.

    Organic matter and water management strategies to reduce methane and nitrous oxide emissions from rice fields in Vietnam · 2014 · compared with control treatments

    Opposite direction

  4. negative
    NLB alone increased ammonia volatilization.

    Closing the rice production trilemma: AWD and nitrogen-loaded biochar synergy achieves co-benefits in yield improvement, water saving, and ammonia mitigation · 2026

    Opposite direction

  5. positive
    One-time biochar application reduced nitrogen leaching by 23.1%.

    Biochar application mode influences nitrogen leaching and NH3 volatilization losses in a rice paddy soil irrigated with N-rich wastewater · 2017

    Same direction

  6. positive
    Fertilizer N leaching was significantly reduced by 75.69% in biochar versus non-biochar treatments in the early season.

    An approach to sustainable agriculture by untangling the fate of contrasting nitrogen sources in double‐season rice grown with and without biochar · 2020 · compared with non-BC treatments

    Same direction

  7. positive
    Biochar reduced CH4 emissions by 25.8-38.9% under both irrigation regimes.

    Biochar incorporation increases grain yield, net ecosystem CO2 exchange, and decreases CH4 emissions in an alternate wetting and drying paddy ecosystem · 2024

    Same direction

  8. positive
    Biochar inhibited N 2 O emissions by 31% over three years.

    Soil carbon sequestration increment and carbon-negative emissions in alternate wetting and drying paddy ecosystems through biochar incorporation · 2024

    Same direction

16 papers more in this group

See all 25 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.