Methane efflux in rice paddy field under different irrigation managements

Moterle, Diovane Freire; Silva, Leandro Souza da; Moro, Vagner João; Bayer, Cimélio; Zschornack, Tiago; Avila, Luis Antônio de; Bundt, Angela Da Cas

doi:10.1590/s0100-06832013000200014

Cited by 25 publications

(20 citation statements)

References 22 publications

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“…Reports from continuously irrigated systems include the following values of kg CH 4 ha −1 : 634 (Hadi et al, 2010); 250 (Cicerone et al, 1992); 112-404 (Schütz et al, 1989); 200-500 (Gutierrez et al, 2013) from Japan, California, Italy and South Korea, respectively. Two continuously irrigated systems (direct-seeded, delayed flood) similar to ours have reported values of 270 kg CH 4 ha −1 (Rogers et al, 2012) and 340-423 kg CH 4 ha −1 (Moterle et al, 2013) from rice fields in Arkansas, USA, and southern Brazil, respectively.…”

Section: Discussionsupporting

confidence: 74%

Yield-scaled global warming potential of two irrigation management systems in a highly productive rice system

Tarlera

Capurro

Irisarri

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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, 55 % lower compared to CF30, while no differences in nitrous oxide emissions were observed between treatments (p > 0.05). No yield differences between irrigation systems were observed in two of the rice seasons (p > 0.05) while AWDI promoted yield reduction in one of the seasons (p < 0.05). When rice yield and greenhouse gases (GHG) emissions were considered together, the AWDI irrigation system allowed for lower yield-scaled total global warming potential (GWP). Higher irrigation water productivity was achieved under AWDI in two of the three rice seasons. These findings suggest that AWDI could be an option for reducing GHG emissions and increasing irrigation water productivity. However, AWDI may compromise grain yield in certain years, reflecting the importance of the need for fine tuning of this irrigation strategy and an assessment of the overall tradeoff between relationships in order to promote its adoption by farmers.

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Section: Discussionsupporting

confidence: 74%

Yield-scaled global warming potential of two irrigation management systems in a highly productive rice system

Tarlera

Capurro

Irisarri

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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“…Such strategies include no-tillage (Bayer et al, 2014), anticipated tillage (Bayer et al, 2015), and intermittent irrigation (Moterle et al, 2013;Zschornack et al, 2016), none of which decrease rice yields relative to traditional soil and water management practices. However, the high variability of soils, climate, and production systems encompassed by the 1.3 million ha of cropland in southern Brazil would make on-site quantification of CH 4 to assess site-specific variables a costly, labor-intensive task.…”

Section: Introductionmentioning

confidence: 99%

Daycent Simulation of Methane Emissions, Grain Yield, and Soil Organic Carbon in a Subtropical Paddy Rice System

Weiler

Tornquist

Zschornack

et al. 2018

Rev. Bras. Ciênc. Solo

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ABSTRACT:The DayCent ecosystem model, widely tested in upland agroecosystems, was recently updated to simulate waterlogged soils. We evaluated the new version in a paddy rice experiment in Southern Brazil. DayCent was used to simulate rice yield, soil organic carbon (SOC), and soil CH 4 fluxes. Model calibration was conducted with a multiple-year dataset from the conventional tillage treatment, followed by a validation phase with data from the no-tillage treatment. Model performance was assessed with statistics commonly used in modeling studies: root mean square error (RMSE), model efficiency (EF), and mean difference (M). In general, DayCent slightly underestimated rice yields under no-tillage (by 0.07 Mg ha -1 , or 9.2 %) and slightly overestimated soil C stocks, especially in the first years of the experiment. A comparison of observed and simulated CH 4 daily fluxes showed that DayCent could simulate the general patterns of soil CH 4 fluxes with slight discrepancies. Daily soil CH 4 fluxes were overestimated by 0.43 kg ha -1 day -1 (12 %). Growth-season CH 4 emissions under no-tillage were also somewhat overestimated (11 % or 45.29 kg ha -1). We conclude that DayCent simulated SOC, rice yield, and CH 4 with some inaccuracies, but the overall performance was considered adequate. However, the model failed to represent the observed potential of no-tillage to mitigate CH 4 emissions, possibly because model algorithms could not capture the actual field conditions derived from no-tillage management, such as soil redox potential, plant senescence, and surface placement of plant residue.

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“…The CH 4 concentration in air samples was analyzed through gas chromatography (GC-2014 mod. "Greenhouse") in a FID detector, operating at 250°C from one mL auto-sampler and using N 2 as carrier gas (MOTERLE et al, 2013).…”

Section: Methodsmentioning

confidence: 99%

Effect of organic acids or monensin-sodium addition on fatty acid production of short chain and methane through the ruminal fermentation “in vitro”

et al. 2016

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Food additives may increase food and animal production efficiency, as well as reduce the production of enteric methane (CH 4 ). With the aim to evaluate the influence of organic additives in two concentrations (250 and 500 ppm) in the production of CH4 (mL), short chain fatty acids (SCFA), ammonia nitrogen (N-NH3) and pH, an experiment "in vitro" gas was conducted, having two control groups, one as a negative control without the presence of additive and another as a positive control, with the addition of monensin-sodium (30ppm). The experiment was arranged in a completely randomized design with three replications. The treatment with monensin-sodium increased the propionate production (p<0.05) and decreased (p<0.05) CH 4 , acetate, butyrate, valerate, isobutyrate, isovalerate production, the acetate/ propionate ratio and total SCFA production compared to treatment without additive, the N-NH 3 concentration being unchanged. Among CTX 250 and 500 organic acids treatments, only 500 CTX showed a trend (p<0.10) to decrease in N-NH 3 concentrations, with no significant changes (p>0.05) in the remaining parameters related to treatment without additives. In this sense, monensin-sodium shows characteristics of modulation of rumen environment. Key words: Food additives, ionophores, ammonia nitrogen, pH ResumoAditivos alimentares podem aumentar a eficiência dos alimentos e a produção animal, bem como reduzir a produção de metano (CH 4 ) entérico. Com objetivo de avaliar a influência de aditivos orgânicos em duas concentrações (250 e 500ppm) na produção de CH 4 (mL), ácidos graxos de cadeia curta (AGCC), nitrogênio amoniacal (N-NH 3 ) e no pH, foi conduzido um experimento "in vitro" gás, tendo dois controles, um negativo sem a presença de aditivo e outro positivo, com à adição de monensina sódica (30ppm). O experimento foi organizado em um delineamento inteiramente casualizado, com três repetições. O tratamento com monensina sódica aumentou (p<0.05) a produção de propionato e diminuiu (p<0.05) a produção de CH 4 , acetato, butirato, valerato, isobutirato, isovalerato, a relação de acetato/propionato e a produção total AGCC em relação ao tratamento sem aditivo, não alterando a concentração de N-NH 3 . Dos tratamentos com ácidos orgânicos CTX 250 e 500, somente o CTX 500 mostrou tendência (p<0.10) a diminuição nas concentrações de N-NH 3 , sem alterações significativas (p>0.05) nos demais parâmetros avaliados em relação ao tratamento sem aditivos. Neste sentido a monensina sódica apresenta características de modulação do ambiente ruminal.

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Methane efflux in rice paddy field under different irrigation managements

Abstract: SUMMARYIndex terms: greenhouse gas, flooding irrigation, intermittent irrigation, redox potential.(

Cited by 25 publications

References 22 publications

Yield-scaled global warming potential of two irrigation management systems in a highly productive rice system

Yield-scaled global warming potential of two irrigation management systems in a highly productive rice system

Daycent Simulation of Methane Emissions, Grain Yield, and Soil Organic Carbon in a Subtropical Paddy Rice System

Effect of organic acids or monensin-sodium addition on fatty acid production of short chain and methane through the ruminal fermentation “in vitro”

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