Statistical analysis of the major variables controlling methane emission from rice fields
Abstract
Rice cultivation is an important anthropogenic source of atmospheric methane (CH 4), the emission of which is affected by management practices. Many field measurements have been conducted in major rice‐producing countries in Asia. We compiled a database of CH 4 emissions from rice fields in Asia from peer‐reviewed journals. We developed a statistical model to relate CH 4 flux in the rice‐growing season to soil properties, water regime in the rice‐growing season, water status in the previous season, organic amendment and climate. The statistical results showed that all these variables significantly affected CH 4 flux, and explained 68% of the variability. Organic amendment and water regime in the rice‐growing season were the top two controlling variables; climate was the least critical variable. The average CH 4 fluxes from rice fields with single and multiple drainages were 60% and 52% of that from continuously flooded rice fields. The flux from fields that were flooded in the previous season was 2.8 times that from fields previously drained for a long season and 1.9 times that from fields previously drained for a short season. In contrast to the previously reported optimum soil pH of around neutrality, soils with pH of 5.0–5.5 gave the maximum CH 4 emission. The model results demonstrate that application of rice straw at 6 t ha−1 before rice transplanting can increase CH 4 emission by 2.1 times; when applied in the previous season, however, it increases CH 4 emission by only 0.8 times. Default emission factors and scaling factors for different water regimes and organic amendments derived from this work can be used to develop national or regional emission inventories.
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Methane emissions from rice cultivation and GHGs from the burning of rice straw were calculated following the methodology outlined by Yan et al.
“We follow the methodology outlined by Yan ([14](#r14), [51](#r51)) to calculate methane emissions from rice cultivation and GHGs from the burning of rice straw.”
From Greenhouse gas mitigation by agricultural intensification (2010) · cites this paper as [51]
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“, 2000), 71 methane emissions from paddy rice production and livestock (Yan et al., 2005), and the loss of 72 stored biomass and soil carbon, all of which may in part be attributed to management.”
Background
- Authors
- Yan, X., Yagi, K., Akiyama, H., & Akimoto, H.
- Affiliations
- Japan Agency for Marine-Earth Science and Technology (JP)
- National Institute for Agro-Environmental Sciences (JP)
- Corresponding author
- Yan, Xiaoyuan
- Venue
- Global Change Biology
- Publisher
- Wiley
- Published
- 2005-07
- Volume
- 11
- Issue
- 7
- Pages
- 1131-1141
- ISSN
- 1354-1013 (ISSN-L)
- 1365-2486
- OpenAlex
- W2113028642
- Cited by
- 382
- References
- 48
- Citations by year
- 2026: 21 · 2025: 27 · 2024: 24 · 2023: 23 · 2022: 19 · 2021: 21 · 2020: 28 · 2019: 22 · 2018: 36 · 2017: 21 · 2016: 19 · 2015: 21 · 2014: 22 · 2013: 18 · 2012: 15
- FWCI
- 4.07
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Global Change Biology (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Ecology › Peatlands and Wetlands Ecology
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Keywords
- methane emissions, paddy fields, greenhouse gas emissions, water regime, soil drainage, soil pH, organic amendments, rice straw, emission factors, emission inventory, Asia
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