Testing a Conceptual Model of Soil Emissions of Nitrous and Nitric Oxides

Davidson, Eric A.; Keller, Michael; Erickson, Heather E.; Verchot, Louis V.; Veldkamp, Edzo

doi:10.1641/0006-3568(2000)050[0667:tacmos]2.0.co;2

Cited by 846 publications

(740 citation statements)

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“…Because of this soil physical property, WFPS at AM3 was high and provided ideal conditions for denitrification. This difference in pore space might also affect the proportion of gaseous species; for example, N 2 O is dominant at relatively high WFPS (70 -90% [Davidson et al, 2000]). The low microbial biomass nitrogen and low nitrate content in AM3 soil (Table 2) indicates that nitrogen cycling at AM3 may be lower than that at the other acacia sites, but the proportion of nitrogen coming out as N 2 O might be larger at AM3 due to the high WFPS.…”

Section: Conversion To Acacia Plantations Might Boost N 2 O Flux Frommentioning

confidence: 99%

“…[3] N 2 O is emitted from soils by nitrification and denitrification processes [Davidson et al, 2000]. The nitrification rate is a primary factor regulating N 2 O emissions, as it both directly controls N 2 O emissions from nitrification and the rate of nitrate supply for the denitrification process.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore N 2 O flux is correlated with the nitrification rate in many types of forest ecosystems [Ishizuka et al, 2002[Ishizuka et al, , 2005a. The soil water condition, including water-filled pore spaces (WFPS), is another important factor regulating N 2 O emission from soils [Davidson et al, 2000]. Theoretically, 60% WFPS is optimal for N 2 O emissions; at <60% WFPS, nitric oxide is dominant, whereas at >60% WFPS, nitrogen gas is dominant.…”

Section: Introductionmentioning

confidence: 99%

“…For example, nitrogen fertilizer input stimulates nitrification, resulting in increased N 2 O emission rates [GarciaMontiel and Binkley, 1998;Davidson et al, 2000;Erickson et al, 2001]. Erickson et al [2001] found a high correlation between the amount of nitrogen input from leaf litter and annual nitrogen oxide (N 2 O + NO) fluxes among six forests of different ages.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Potential N₂O emissions from leguminous tree plantation soils in the humid tropics

Arai

Ishizuka

Ohta

et al. 2008

Global Biogeochemical Cycles

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[1] We compared nitrous oxide (N 2 O) emissions over 1 year from soils of plantations growing acacia, which is a leguminous plant capable of symbiotic nitrogen fixation in root nodules, and secondary forests in Sumatra, Indonesia. N 2 O emissions from acacia plantation soils fluctuated seasonally, from high in the wetter season to low in the drier season, whereas N 2 O emissions from secondary forest soils were low throughout the year. Water-filled-pore-space data showed that denitrification contributed substantially to N 2 O emissions from soils at acacia sites. The average annual N 2 O flux in acacia plantations was 2.56 kg N ha À1 a À1 , which was eight times higher than that from secondary forest soils (0.33 kg N ha À1 a À1 ). In secondary forests, NH 4 + was the dominant form of inorganic nitrogen. However, in acacia plantations, the NH 4 + : NO 3 À ratio was relatively lower than that in secondary forests. These results suggest that secondary forests were nitrogen limited, but acacia plantations were less nitrogen limited. Leguminous tree plantations may increase nitrogen cycling, resulting in greater N 2 O emissions from the soil. However, on a global warming potential basis, N 2 O emissions from acacia plantation soils accounted for less than 10% of the carbon uptake by plants. Nevertheless, because of the spread of leguminous tree plantations in Asia, the importance of N 2 O emissions from leguminous tree stands will increase in the coming decades.

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Section: Conversion To Acacia Plantations Might Boost N 2 O Flux Frommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Potential N₂O emissions from leguminous tree plantation soils in the humid tropics

Arai

Ishizuka

Ohta

et al. 2008

Global Biogeochemical Cycles

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“…NO production in soils depends on soil water content [5], temperature and N availability [2]. Forest soils with high N availability emit greater amounts of NO than N limited soils [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Rhizospheric NO interacts with the acquisition of reduced N sources by the roots of European beech (Fagus sylvatica L.)

et al. 2009

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a b s t r a c tThe gas phase of the soil plays an important role in plant growth and development. We investigated the effect of rhizospheric NO as a signalling compound for N uptake of beech roots. Following exposure to NO, ammonium and glutamine uptake into roots were determined using 15 N-labelling, and gene expression of selected transporters was analysed by quantitative real-time PCR. Uptake of both N sources increased significantly with elevated NO concentration. However, with one exception, this increase was not reflected in up-regulation of expression of the respective transporters.

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Separate effects of flooding and anaerobiosis on soil greenhouse gas emissions and redox sensitive biogeochemistry

McNicol

Silver

2014

J. Geophys. Res. Biogeosci.

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Soils are large sources of atmospheric greenhouse gases, and both the magnitude and composition of soil gas emissions are strongly controlled by redox conditions. Though the effect of redox dynamics on greenhouse gas emissions has been well studied in flooded soils, less research has focused on redox dynamics without total soil inundation. For the latter, all that is required are soil conditions where the rate of oxygen (O 2 ) consumption exceeds the rate of atmospheric replenishment. We investigated the effects of soil anaerobiosis, generated with and without flooding, on greenhouse gas emissions and redox-sensitive biogeochemistry. We collected a Histosol from a regularly flooded peatland pasture and an Ultisol from a humid tropical forest where soil experiences frequent low redox events. We used a factorial design of flooding and anaerobic dinitrogen (N 2 ) headspace treatments applied to replicate soil microcosms. An N 2 headspace suppressed carbon dioxide (CO 2 ) emissions by 50% in both soils. Flooding, however, led to greater anaerobic CO 2 emissions from the Ultisol. Methane emissions under N 2 were also significantly greater with flooding in the Ultisol. Flooding led to very low N 2 O emissions after an initial pulse in the Histosol, while higher emission rates were maintained in control and N 2 treatments. We conclude that soil greenhouse gas emissions are sensitive to the redox effects of O 2 depletion as a driver of anaerobiosis and that flooding can have additional effects independent of O 2 depletion. We emphasize that changes to the soil diffusive environment under flooding impacts transport of all gases, not only O 2 , and changes in dissolved solute availability under flooding may lead to increased mineralization of C.

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Testing a Conceptual Model of Soil Emissions of Nitrous and Nitric Oxides

Cited by 846 publications

References 53 publications

Potential N₂O emissions from leguminous tree plantation soils in the humid tropics

Potential N₂O emissions from leguminous tree plantation soils in the humid tropics

Rhizospheric NO interacts with the acquisition of reduced N sources by the roots of European beech (Fagus sylvatica L.)

Separate effects of flooding and anaerobiosis on soil greenhouse gas emissions and redox sensitive biogeochemistry

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Testing a Conceptual Model of Soil Emissions of Nitrous and Nitric Oxides

Cited by 846 publications

References 53 publications

Potential N2O emissions from leguminous tree plantation soils in the humid tropics

Potential N2O emissions from leguminous tree plantation soils in the humid tropics

Rhizospheric NO interacts with the acquisition of reduced N sources by the roots of European beech (Fagus sylvatica L.)

Separate effects of flooding and anaerobiosis on soil greenhouse gas emissions and redox sensitive biogeochemistry

Contact Info

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Potential N₂O emissions from leguminous tree plantation soils in the humid tropics

Potential N₂O emissions from leguminous tree plantation soils in the humid tropics