Suppression of methane emission from rice paddies by ferric iron fertilization

Jäckel, Udo; Schnell, Sylvia

doi:10.1016/s0038-0717(00)00094-8

Cited by 86 publications

(40 citation statements)

References 19 publications

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“…Seasonal CH 4 emissions showed strong negative correlations with the active iron, SO 4 2-, and ferrous iron concentrations in soil at harvesting stage (Table 3). This implies that the released iron oxides and sulfate from the applied soil amendments acted as electron acceptors and eventually suppressed CH 4 emissions as supported by Jackel and Schnell (2000). On the other hand, seasonal N 2 O emissions showed strong positive correlations with the soil porosity, NO 3 -, soil pH, and soil Eh (Table 3).…”

Section: Discussionmentioning

confidence: 72%

Mitigating Global Warming Potentials of Methane and Nitrous Oxide Gases from Rice Paddies under different irrigation regimes

Ali

Hoque

Kim

2012

AMBIO

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A field experiment was conducted in Bangladesh Agricultural University Farm to investigate the mitigating effects of soil amendments such as calcium carbide, calcium silicate, phosphogypsum, and biochar with urea fertilizer on global warming potentials (GWPs) of methane (CH 4 ) and nitrous oxide (N 2 O) gases during rice cultivation under continuous and intermittent irrigations. Among the amendments phosphogypsum and silicate fertilizer, being potential source of electron acceptors, decreased maximum level of seasonal CH 4 flux by 25-27 % and 32-38 % in continuous and intermittent irrigations, respectively. Biochar and calcium carbide amendments, acting as nitrification inhibitors, decreased N 2 O emissions by 36-40 % and 26-30 % under continuous and intermittent irrigations, respectively. The total GWP of CH 4 and N 2 O gases were decreased by 7-27 % and 6-34 % with calcium carbide, phosphogypsum, and silicate fertilizer amendments under continuous and intermittent irrigations, respectively. However, biochar amendments increased overall GWP of CH 4 and N 2 O gases.

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Section: Discussionmentioning

confidence: 72%

Mitigating Global Warming Potentials of Methane and Nitrous Oxide Gases from Rice Paddies under different irrigation regimes

Ali

Hoque

Kim

2012

AMBIO

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“…It is possible the effect was due to suppression of CH 4 production and then an apparent decrease in AOM as NO 4 availability is limiting in many peatlands, we wonder whether Fe(III) could fuel AOM because the reaction is energetically favorable (Table 1) and the process has been demonstrated in marine sediments (Beal et al, 2009). Fe(III) is an important electron acceptor in many wetland soils (Frenzel et al, 1999;Jäckel and Schnell, 2000;Roden and Wetzel, 1996;Küsel et al, 2008) and it functions in organic C re-mineralization Phillips, 1986, 1988). Moreover, a recent study of CH 4 cycling in ferruginous Lake Matano, Indonesia provides anecdotal evidence for AOM linked to Fe-oxides in the water column (Crowe et al, 2011).…”

Section: Biogeochemistry and Electron Acceptorsmentioning

confidence: 99%

Anaerobic oxidation of methane: an underappreciated aspect of methane cycling in peatland ecosystems?

2011

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Abstract.Despite a large body of literature on microbial anaerobic oxidation of methane (AOM) in marine sediments and saline waters and its importance to the global methane (CH 4 ) cycle, until recently little work has addressed the potential occurrence and importance of AOM in non-marine systems. This is particularly true for peatlands, which represent both a massive sink for atmospheric CO 2 and a significant source of atmospheric CH 4 . Our knowledge of this process in peatlands is inherently limited by the methods used to study CH 4 dynamics in soil and sediment and the assumption that there are no anaerobic sinks for CH 4 in these systems. Studies suggest that AOM is CH 4 -limited and difficult to detect in potential CH 4 production assays against a background of CH 4 production. In situ rates also might be elusive due to background rates of aerobic CH 4 oxidation and the difficulty in separating net and gross process rates. Conclusive evidence for the electron acceptor in this process has not been presented. Nitrate and sulfate are both plausible and favorable electron acceptors, as seen in other systems, but there exist theoretical issues related to the availability of these ions in peatlands and only circumstantial evidence suggests that these pathways are important. Iron cycling is important in many wetland systems, but recent evidence does not support the notion of CH 4 oxidation via dissimilatory Fe(III) reduction or a CH 4 oxidizing archaea in consortium with an Fe(III) reducer. Calculations based on published rates demonstrate that AOM might be a significant and underappreciated constraint on the global CH 4 cycle, although much about the process is unknown, in vitro rates may not relate well to in situ rates, and projections based on those rates are fraught with uncertainty. We suggest electron transfer mechanisms, C flow and pathways, and quantifying in situ peatland AOM rates as the highest priority topics for future research.

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“…Before administering the 13 C-labeled substrate, we preincubated microcosms for 14 days to allow for the activation and development of an anoxic rice field soil microbiota. Electron acceptors such as nitrate, sulfate, and iron(III) are typically reduced after 8 to 12 days in Vercelli rice field soil (23,26,32), which is an important prerequisite for the selective labeling of propionate-oxidizing syntrophs intended in this experiment. After 2 weeks of preincubation, methane in the headspace had accumulated to ϳ3.5 kPa, which is indicative of the reduction of sulfate and iron(III) in rice field soils (57).…”

Section: Consumption Of [mentioning

confidence: 99%

Stable-Isotope Probing of Microorganisms Thriving at Thermodynamic Limits: Syntrophic Propionate Oxidation in Flooded Soil

Lueders

Pommerenke

Friedrich

2004

Appl Environ Microbiol

185

142

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Propionate is an important intermediate of the degradation of organic matter in many anoxic environments. In methanogenic environments, due to thermodynamic constraints, the oxidation of propionate requires syntrophic cooperation of propionate-fermenting proton-reducing bacteria and H 2 -consuming methanogens. We have identified here microorganisms that were active in syntrophic propionate oxidation in anoxic paddy soil by rRNA-based stable-isotope probing (SIP). After 7 weeks of incubation with [ 13 C]propionate (<10 mM) and the oxidation of ϳ30 mol of 13 C-labeled substrate per g dry weight of soil, we found that archaeal nucleic acids were 13 C labeled to a larger extent than those of the bacterial partners. Nevertheless, both terminal restriction fragment length polymorphism and cloning analyses revealed Syntrophobacter spp., Smithella spp., and the novel Pelotomaculum spp. to predominate in "heavy" 13 C-labeled bacterial rRNA, clearly showing that these were active in situ in syntrophic propionate oxidation. Among the Archaea, mostly Methanobacterium and Methanosarcina spp. and also members of the yet-uncultured "rice cluster I" lineage had incorporated substantial amounts of 13 C label, suggesting that these methanogens were directly involved in syntrophic associations and/or thriving on the [13 C]acetate released by the syntrophs. With this first application of SIP in an anoxic soil environment, we were able to clearly demonstrate that even guilds of microorganisms growing under thermodynamic constraints, as well as phylogenetically diverse syntrophic associations, can be identified by using SIP. This approach holds great promise for determining the structure and function relationships of further syntrophic or other nutritional associations in natural environments and for defining metabolic functions of yet-uncultivated microorganisms.In many anoxic environments, which are low in electron acceptors such as oxygen, nitrate, sulfate, and iron or manganese oxides, complex organic matter is degraded to methane and CO 2 by the cooperation of anaerobic microorganisms of several metabolic guilds (47). An important intermediate of organic matter conversion under methanogenic conditions is propionate, which may account for up to 35% of methanogenesis in anaerobic digestors (35) and up to 30% in paddy soil (15,26). The degradation of propionate to acetate, CO 2 , and 3 H 2 is highly endergonic under standard conditions (⌬G°Ј ϭ ϩ76.1 kJ/mol), but it can be accomplished by syntrophic cooperation of propionate-oxidizing hydrogen-producing bacteria and hydrogen (or formate)-scavenging partner microorganisms (methanogens), which maintain a low hydrogen partial pressure (for a review, see reference 47). Only in such syntrophic associations does propionate degradation become feasible under methanogenic conditions. The process has been studied extensively in flooded rice field soil (26, 27, 58), in upflow anaerobic sludge blanket reactors (52), and sediments (46,49). In all environments studied, the methyl-malonyl-coenzyme...

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Suppression of methane emission from rice paddies by ferric iron fertilization

Cited by 86 publications

References 19 publications

Mitigating Global Warming Potentials of Methane and Nitrous Oxide Gases from Rice Paddies under different irrigation regimes

Mitigating Global Warming Potentials of Methane and Nitrous Oxide Gases from Rice Paddies under different irrigation regimes

Anaerobic oxidation of methane: an underappreciated aspect of methane cycling in peatland ecosystems?

Stable-Isotope Probing of Microorganisms Thriving at Thermodynamic Limits: Syntrophic Propionate Oxidation in Flooded Soil

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