Methane flux from irrigated rice fields in relation to crop growth and N-fertilization

Singh, Sunil Kumar; Singh, Jaya; Kashyap, A. K.

doi:10.1016/s0038-0717(99)00027-9

Cited by 213 publications

(63 citation statements)

References 26 publications

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“…A second, more detailed study focused on the effect of placing a sediment MFC in the rhizosphere of rice plants on greenhouse gas emissions. (Gogoi et al 2005;Singh et al 1999;Xu et al 2007)). The microcosm that was not supplemented with straw was the configuration that came close to natural CH 4 fluxes in the order of 35 mgCH 4 m -2 h -1 .…”

Section: Resultsmentioning

confidence: 99%

“…Therefore a promising route for mitigation of CH 4 emissions is to prevent the formation of CH 4 in the rhizosphere. Next to introduction of alternative electron acceptors, other mitigation strategies include fertilizer management, water management, biochar addition to the soil and choosing crop varieties with little aerenchyma or little rhizodeposition (Aulakh et al 2001;Aulakh et al 2000;Conrad 2002;Majumdar 2003;Singh et al 1999;Zhang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Methane emissions from rice paddies can be estimated to range from 0 up to 60 mgCH 4 m -2 h -1 (Gogoi et al 2005;Singh et al 1999;Xu et al 2007). This corresponds to the equivalent of an electrical current of 0 to 804 mA m -2 (See supplementary information for calculations).…”

Section: Introductionmentioning

confidence: 99%

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Greenhouse gas emissions from rice microcosms amended with a plant microbial fuel cell

Arends

Speeckaert

Blondeel

et al. 2013

Appl Microbiol Biotechnol

118

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Methane (CH 4 ) release from wetlands is an important source of greenhouse gas emissions. Gas exchange occurs mainly through the aerenchyma of plants and production of greenhouse gases is heavily dependent on rhizosphere biogeochemical conditions (i.e. substrate availability and redox potential). It is hypothesized that by introducing a biocatalyzed anode electrode in the rhizosphere of wetland plants, a competition for carbon and electrons can be invoked between electrical current generating bacteria and methanogenic archaea. The anode electrode is part of a bioelectrochemical system (BES) capable of harvesting electrical current from microbial metabolism. In this work, the anode of a BES was introduced in the rhizosphere of rice plants (Oryza sativa) and the impact on methane emissions was monitored.Microbial current generation was able to outcompete methanogenic processes when the bulk matrix contained low concentrations of organic carbon, provided that the electrical circuit with the effective electro-active microorganisms was in place. When interrupting the electrical circuit or supplying an excess of organic carbon, methanogenic metabolism was able to outcompete current generating metabolism. The qPCR results showed hydrogenotrophic methanogens were the most abundant methanogenic group present, while mixotrophic or acetoclastic methanogens were hardly detected in the bulk rhizosphere or on the electrodes. Competition for electron donor and acceptor were likely the main drivers to lower methane emissions. Overall, electrical current generation with BESs is an interesting option to control CH 4 emissions from wetlands but needs to be applied in combination with other mitigation strategies to be successful and feasible in practice.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Greenhouse gas emissions from rice microcosms amended with a plant microbial fuel cell

Arends

Speeckaert

Blondeel

et al. 2013

Appl Microbiol Biotechnol

118

View full text Add to dashboard Cite

show abstract

“…Seasonal CH 4 , CO 2 , or N 2 O flux for crop growing period was computed as reported by Singh et al (1999).…”

Section: Estimation Of Ch 4 Co 2 and N 2 O Emissionsmentioning

confidence: 99%

Intermittent drainage in paddy soil: ecosystem carbon budget and global warming potential

Haque

Biswas

Kim

et al. 2016

Paddy Water Environ

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Intermittent drainage of rice fields alters soil redox potential and contributes to the reduction of CH 4 emission and thus may reduce net global warming potential (GWP) during rice cultivation. Incorporation of green biomass helps maintaining soil organic matter, but may increase CH 4 emission. We investigated net ecosystem carbon budget (NECB) and net GWP under two water management regimes-continuous flooding and intermittent drainage-having four biomass incorporation levels (0, 3, 6 and 12 Mg ha -1 ). Water management and biomass incorporation level demonstrated significant (P \ 0.05) interaction effect on the NECB and GWP. Intermittent drainage decreased the NECB by ca. 6-46 % than continuous flooding under same rates of cover crop biomass (CCB) incorporation. Moreover, intermittent drainage reduced seasonal CH 4 -C fluxes by ca. 54-58 % and net GWP by 35-58 % compared to continuous flooding. There was also no significant reduction in rice yield because of intermittent drainage under similar CCB. This implies that incorporation of 3 Mg ha -1 CCB and intermittent drainage could be a good option for reducing net GWP and higher grain yield.

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“…The total CH 4 emission for the entire cultivation period was computed by the formula of Singh et al (1999): …”

mentioning

confidence: 99%

Effect of seedling transplanting date on methane emission from rice paddy soil during cultivation

Kim

Gutierrez

Kim

2013

Soil Science and Plant Nutrition

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In most temperate mono-rice cultivation systems like Korea, the local recommended transplanting date of rice (Oryza sativa L.) seedlings is proposed by the government agency considering climate, rice cultivar, rice productivity and quality, etc. Recently the transplanting of rice seedlings earlier than the recommended transplanting date (RTD) has been adopted by the local farmers to get high yield and to harvest earlier for higher market value. Earlier transplanting than RTD might influence methane (CH 4 ) emission due to the prolonged cultivation period, but its effect was not evaluated well so far. In this study, the effects of seedling transplanting date on CH 4 emission and rice productivity were investigated for two years in a general paddy soil. The 30-day old seedlings were transplanted on the local RTD (every June 15) as the control, and at 30 and 15 days before and 15 days after the RTD for comparison. There was no difference on CH 4 flux pattern among the treatments, but the earlier transplanting before the RTD significantly (P 0.05) increased total CH 4 emissions during rice cultivation due to the extended soil flooding period and improved plant growth. Rice grain yield was increased by earlier transplanting, but the values were not significantly different from those of transplanting practices on RTD and 15 days before RTD. Therefore, among all the treatments, the lowest total CH 4 emission per grain yield was observed in the RTD treatment. Conclusively, rice transplanting following the RTD, rather than early or late transplanting, could be more effective to minimize CH 4 emission without significantly decreasing the rice productivity.

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Methane flux from irrigated rice fields in relation to crop growth and N-fertilization

Cited by 213 publications

References 26 publications

Greenhouse gas emissions from rice microcosms amended with a plant microbial fuel cell

Greenhouse gas emissions from rice microcosms amended with a plant microbial fuel cell

Intermittent drainage in paddy soil: ecosystem carbon budget and global warming potential

Effect of seedling transplanting date on methane emission from rice paddy soil during cultivation

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