Characterization of methane emissions from rice fields in Asia. III. Mitigation options and future research needs

Waßmann, Reiner; Lantin, R. S.; Neue, H. U.; Buendia, L. V.; Corton, T. M.; Lu, Yahai

doi:10.1007/978-94-010-0898-3_3

Cited by 88 publications

(126 citation statements)

References 26 publications

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“…tillage, seeding, and weeding practices) (USEPA, 2011(USEPA, , 2016Kai et al, 2011;Yan et al, 2009;Conrad et al, 2000). For instance, methane emissions from rice paddies increase with organic amendments (Cai et al, 1997) but can be mitigated by applying other types of fertilizers (mineral, composts, biogas residues, wet seeding) (Wassmann et al, 2000). Some studies have suggested that decreases in microbial emissions, particularly due to changes in the practice of rice cultivation, could be responsible for a ∼ 15 Tg CH 4 yr −1 decrease over the period from 1980s to 2000s (Kai et al, 2011).…”

Section: Rice Cultivationmentioning

confidence: 99%

The global methane budget 2000–2012

Saunois

Bousquet

Poulter

et al. 2016

Earth Syst. Sci. Data

906

733

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Abstract. The global methane (CH 4 ) budget is becoming an increasingly important component for managing realistic pathways to mitigate climate change. This relevance, due to a shorter atmospheric lifetime and a stronger warming potential than carbon dioxide, is challenged by the still unexplained changes of atmospheric CH 4 over the past decade. Emissions and concentrations of CH 4 are continuing to increase, making CH 4 the second most important human-induced greenhouse gas after carbon dioxide. Two major difficulties in reducing uncertainties come from the large variety of diffusive CH 4 sources that overlap geographically, and from the destruction of CH 4 by the very short-lived hydroxyl radical (OH). To address these difficulties, we have established a consortium of multi-disciplinary scientists under the umbrella of the Global Carbon Project to synthesize and stimulate research on the methane cycle, and producing regular (∼ biennial) updates of the global methane budget. This consortium includes atmospheric physicists and chemists, biogeochemists of surface and marine emissions, and socio-economists who study anthropogenic emissions. Following Kirschke et al. (2013), we propose here the first version of a living review paper that integrates results of top-down studies (exploiting atmospheric observations within an atmospheric inverse-modelling framework) and bottom-up models, inventories and data-driven approaches (including process-based models for estimating land surface emissions and atmospheric chemistry, and inventories for anthropogenic emissions, data-driven extrapolations). . Top-down inversions consistently infer lower emissions in China (∼ 58 Tg CH 4 yr −1 , range 51-72, −14 %) and higher emissions in Africa (86 Tg CH 4 yr −1 , range 73-108, +19 %) than bottom-up values used as prior estimates. Overall, uncertainties for anthropogenic emissions appear smaller than those from natural sources, and the uncertainties on source categories appear larger for top-down inversions than for bottom-up inventories and models.The most important source of uncertainty on the methane budget is attributable to emissions from wetland and other inland waters. We show that the wetland extent could contribute 30-40 % on the estimated range for wetland emissions. Other priorities for improving the methane budget include the following: (i) the development of process-based models for inland-water emissions, (ii) the intensification of methane observations at local scale (flux measurements) to constrain bottom-up land surface models, and at regional scale (surface networks and satellites) to constrain top-down inversions, (iii) improvements in the estimation of atmospheric loss by OH, and (iv) improvements of the transport models integrated in top-down inversions.

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Section: Rice Cultivationmentioning

confidence: 99%

The global methane budget 2000–2012

Saunois

Bousquet

Poulter

et al. 2016

Earth Syst. Sci. Data

906

733

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“…Previous research has demonstrated that midseason aeration of rice paddy fields can reduce CH4 emission by about 50% (Kimura et al, 1992;Kanno et al, 1997;Yagi et al, 1997;Wassmann et al, 2000;Cai et al, 2003). Sass et al (1992) and Kimura et al (1991) observed that a single midseason drainage may reduce seasonal emission rates by about 50%.…”

Section: Water Management Strategiesmentioning

confidence: 99%

“…1. These options include: managing water regime and straw addition, establishing an adequate fertilization program, using nitrification inhibitors, changing tillage practices, including crop rotation and selecting less vigorous rice varieties (Aulakh et al, 2000;Wassmann et al, 2000;Majumdar, 2003;Minamikawa et al, 2006;Yan et al, 2009). However, mitigation strategies should be effective, technically and economically applicable and easily understood and accepted by farmers.…”

Section: Mitigation Strategies Based On Water and Straw Management Prmentioning

confidence: 99%

“…Although the relationship between CH4 emissions and straw application has been reported in several studies carried out in Italy (Schütz et al, 1989), Japan (Yagi and Minami, 1990;Naser et al, 2007;Xu and Hosen2010), United States (Cicerone et al, 1992;Bossio et al, 1999;Kongchum et al, 2006), China (Hou et al, 2000;Lu et al, 2000;Zou et al, 2005;Wang et al, 2010;Zhang et al, 2011), Thailand (Chareonsilp et al, 2000Vibol and Towprayoon, 2010), India (Jain et al, 2000;Khosa et al, 2010), and Philippines (Neue et al, 1994;Denier Van der Gon and Neue, 1995); knowledge gaps related with the combined effect of the type, dose, and quality of rice straw with varying water regimes still remain.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Water and Straw Management Practices on Methane Emissions from Rice Fields: A Review Through a Meta-Analysis

Sanchís

Ferrer

Torres

et al. 2012

Environmental Engineering Science

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Running titleRice management practices and methane emissions 2 AbstractRice fields contribute substantially to global warming of the atmosphere through the emission of methane (CH4). This paper reviews the state-of-the-art of factors affecting CH4 emissions in rice fields, focusing on soil organic matter content and water management practices. It establishes a quantitative relationship between these factors based on a literature survey through a meta-analysis, useful to update the emission factors used to estimate CH4 in National Emission Inventories. Methane emissions in rice fields can be as much as 90% higher in continuously flooded rice fields compared with other water management systems, independent from straw addition. Water management systems which involve absence of flooding in total or part of the growing period such as midseason drainages, intermittent flooding and percolation control can reduce CH4 emissions substantially. Moreover, CH4 emissions increase with the amount of straw added until 7.7 t/ha for continuously flooded soils and until 5.1 t/ha for other water regimes. Above these levels, no further increase is produced with further addition of straw. As regards to rice straw management mitigation strategies, recommended practices are: composting rice straw, straw burning under controlled conditions, recollecting rice straw for biochar production, generation of energy, to be used as a substrate, or to obtain other by-products with added value. This review improves the understanding of the relationship between straw application rate, water regimes and CH4 emissions from rice fields to date. This relationship can help to select the most appropriate management practices to improve current mitigation strategies to reduce atmospheric CH4.

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“…CH 4 fluxes in rice fields are strongly regulated by levels of organic fertilizer input 27 . Chemical fertilizer application in China and India increased substantially from 1970 to 2005 (Fig.…”

mentioning

confidence: 99%