Interactions between N application rate, CH4 oxidation and N2O production in soil

Acton, Stuart David; Baggs, Elizabeth M.

doi:10.1007/s10533-010-9442-5

Cited by 49 publications

(28 citation statements)

References 49 publications

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“…The CH 4 oxidation of the CT V/M system (-162 ± 71 g C ha -1 ) was quite similar to that the O/M and V/M cropping systems under NT management (combined average of -161 ± 151 g C ha -1 ), despite having different NH 4 + -N content (peaking at 16.6 and 5.6 mg N kg -1 of soil, respectively; Figure 5). Thus, the results indicate that NH 4 + -N does not have a suppressive effect on soil CH 4 oxidation during the postmanagement period under both tillage systems, which contrasts with the findings widely reported in the published literature (POWLSON et al, 1997;CHEBII;NDUFA, 2006;ACTON;BAGGS, 2011). However, because a thick soil layer was sampled (0-30 cm) in the current study, some possible effects of NH 4 + -N could have been masked (i.e., a dilution effect).…”

Section: Source: Elaboration Of the Authorscontrasting

confidence: 97%

“…Soils are the only biological sink for CH 4 (SMITH et al, 2000); yet, the cultivation of undisturbed soils causes a significant decrease in soil CH 4 sink strength (POWLSON et al, 1997;LAL, 2005;LAL, 2006;MOJEREMANE;REES;MENCUCCINI, 2010). Ploughing and disking appear to be the main causes for this decline, in addition to artificial N fertilization practices (HÜTSCH, 1998;SUWANWAREE;ROBERTSON, 2005;ACTON;BAGGS, 2011;STIEHL-BRAUN et al, 2011). Soil disturbance by conventional tillage (CT) systems creates an inhospitable environment for methanotrophic organisms (WILLISON et al, 1995;HÜTSCH, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Soil methane oxidation in a long-term no-tillage system in Southern Brazil

et al. 2013

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Conservation management systems are usually suggested as alternative to restore the soil methane (CH 4 ) oxidation capacity of degraded soils; however, little information is available on tropical and subtropical soils. Our objective was to evaluate the long-term (19 years) effect of no-tillage (NT) versus conventional tillage (CT) management systems on CH 4 fluxes in a formerly degraded Acrisol in Southern Brazil. Annual CH 4 fluxes of two cropping systems [O/M-black oat (Avena strigosa)/maize and V/M-vetch (Vigna sativa)/maize] were measured in NT and CT soils. Static chambers were used for air sampling, while chromatography was used for CH 4 analysis. Analysis of the historical dataset at this experimental site indicated improvements in soil quality under the NT system, especially in legumebased cropping system (V/M) that exhibited the highest annual biomass input. CH 4 fluxes ranged from −42 ± 2 to 38 ± 16 µg C m -2 h -1 , and annual CH 4 emissions ranged from −825 ± 117 (CT V/M) to 453 ± 185 g C ha -1 (NT O/M). Thus, the annual CH 4 oxidation capacity of the soil was not related to the soil quality produced by the soil management systems. On the basis of our results and published literature, we postulate that conservation management systems improve the methane oxidation and soil quality in distinct soil layers, which result in a slow effect of these management systems on the methane oxidation capacity. Key words: Global warming, tillage systems, tropical soils, cropping systems ResumoSistemas conservacionistas de manejo de solo são considerados usualmente uma alternativa para restaurar a capacidade de solos agrícolas degradados em oxidar metano (CH 4 ), mas escassa informação é disponível para solos tropicais e subtropicais. O objetivo do presente estudo foi avaliar o efeito de longo prazo (19 anos) do plantio direto (PD) nos fluxos de CH 4 em um Argissolo Vermelho (Classificação Brasileira) degradado da região Sul do Brasil, em comparação ao preparo convencional (PC). Fluxos anuais de CH 4 do solo foram avaliados nos sistemas PD e PC sob dois sistemas de cultura (aveia/ milho-A/M e ervilhaca/milho-E/M). Amostragem do ar foi conduzida utilizando o método da câmara

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Section: Source: Elaboration Of the Authorscontrasting

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Soil methane oxidation in a long-term no-tillage system in Southern Brazil

et al. 2013

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“…This turnover time is much longer than the average NO 3 − turnover time of about 1 day found by Booth et al (2005) based on 100 studies in agricultural, grassland and woodland soils. The N 2 O emission rates measured in our experiment (0.17-0.70 ng N 2 O g −1 soil h −1 ) were well within the (Acton and Baggs 2010;Stevens et al 1997).…”

Section: Forsupporting

confidence: 77%

Effects of elevated CO2 and O3 on N-cycling and N2O emissions: a short-term laboratory assessment

Decock

Six

2011

Plant Soil

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Background and aims Elevated atmospheric CO 2 (eCO 2 ) and tropospheric O 3 (eO 3 ) can alter soil microbial processes, including those underlying N 2 O emissions, as an indirect result of changes in plant inputs. In this study, effects of eCO 2 and eO 3 on sources of N 2 O in a soybean (Glycine max (L.) Merr.) agroecosystem in Illinois (SoyFACE) were investigated. We hypothesized that increases in available C and anaerobic microhabitat under eCO 2 would stimulate N 2 O emissions, with a proportionally larger increase in denitrification derived N 2 O (N 2 O D ) compared to nitrification plus nitrifier denitrification derived N 2 O (N 2 O N+ND ). We expected opposite effects under eO 3 . Methods Isotopically labeled 15 NH 4 14 NO 3 and 14 NH 4 15 NO 3 were used to evaluate mineral N transformations, N 2 O D , and N 2 O N+ND in a 12-day incubation experiment. Results We observed minimal effects of eCO 2 and eO 3 on N 2 O emissions, movement of 15 N through mineral N pools, soil moisture content and C availability. Possibly, altered C and N inputs by eCO 2 and eO 3 were small relative to the high soil organic C content and N-inputs via biological N 2 -fixation, minimizing potential effects of eCO 2 and eO 3 on N-cycling. Conclusion We conclude that eCO 2 and eO 3 did not affect N 2 O emissions in the short term. However, it remains to be tested whether N 2 O emissions in SoyFACE will be unaltered by eCO 2 and eO 3 on a larger temporal scale under field conditions.

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“…() who showed that CH 4 uptake may recover slowly if disturbance intensity is weakening, although a full recovery to rates of CH 4 uptake observed for natural systems may take decades up to a century. The observed slight inhibition CH 4 uptake by fertilization, turning plots of maize and Miscanthus from weak net sinks to weak net sources may be explained by a switching of function of the CH 4 mono‐oxygenase to oxidize ammonia rather than CH 4 in the presence of N as discussed by Acton & Baggs () or Bedard & Knowles ().…”

Section: Discussionmentioning

confidence: 95%

Soil‐derived trace gas fluxes from different energy crops – results from a field experiment in Southwest Germany

et al. 2011

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Willow coppice, energy maize and Miscanthus were evaluated regarding their soil-derived trace gas emission potential involving a nonfertilized and a crop-adapted slow-release nitrogen (N) fertilizer scheme. The N application rate was 80 kg N ha À1 yr À1 for the perennial crops and 240 kg N ha À1 yr À1 for the annual maize. A replicated field experiment was conducted with 1-year measurements of soil fluxes of CH 4 , CO 2 and N 2 O in weekly intervals using static chambers. The measurements revealed a clear seasonal trend in soil CO 2 emissions, with highest emissions being found for the N-fertilized Miscanthus plots (annual mean: 50 mg C m). Significant differences between the cropping systems were found in soil N 2 O emissions due to their dependency on amount and timing of N fertilization. N-fertilized maize plots had highest N 2 O emissions by far, which accumulated to 3.6 kg N 2 O ha À1 yr À1 . The contribution of CH 4 fluxes to the total soil greenhouse gas subsumption was very small compared with N 2 O and CO 2 . CH 4 fluxes were mostly negative indicating that the investigated soils mainly acted as weak sinks for atmospheric CH 4 . To identify the system providing the best ratio of yield to soil N 2 O emissions, a subsumption relative to biomass yields was calculated. N-fertilized maize caused the highest soil N 2 O emissions relative to dry matter yields. Moreover, unfertilized maize had higher relative soil N 2 O emissions than unfertilized Miscanthus and willow. These results favour perennial crops for bioenergy production, as they are able to provide high yields with low N 2 O emissions in the field.

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Interactions between N application rate, CH4 oxidation and N2O production in soil

Cited by 49 publications

References 49 publications

Soil methane oxidation in a long-term no-tillage system in Southern Brazil

Soil methane oxidation in a long-term no-tillage system in Southern Brazil

Effects of elevated CO2 and O3 on N-cycling and N2O emissions: a short-term laboratory assessment

Soil‐derived trace gas fluxes from different energy crops – results from a field experiment in Southwest Germany

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