DenNit – Experimental analysis and modelling of soil N2O efflux in response on changes of soil water content, soil temperature, soil pH, nutrient availability and the time after rain event

Reth, Sascha; Hentschel, Kerstin; Drösler, Matthias

doi:10.1007/s11104-004-5978-2

Cited by 28 publications

(24 citation statements)

References 71 publications

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“…But we also found negative correlations. This is in contrast to the expectations for denitrification processes: Higher soil temperatures should enable higher formation of N 2 O via denitrification, but could also lead to a reduced nitrification (Reth et al 2005). Apparently, other parameters not considered in this study influence the production and consumption of N 2 O in the four lysimeters.…”

Section: Discussioncontrasting

confidence: 77%

See 1 more Smart Citation

Whole-year-round Observation of N2O Profiles in Soil: A Lysimeter Study

Reth

Graf

Gefke

et al. 2007

Water Air Soil Pollut: Focus

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Despite many studies of the N 2 O emission, there is a lack of knowledge on the role of subsoil for N 2 O emission, particularly in sandy soils. To obtain insight into the entrapment, diffusion, convection and ebullition of N 2 O in the soil, the N 2 O concentration in the soil atmosphere was measured over a period of 1 year in 4 lysimeters (agricultural soil monoliths of 1 m2 × 2 m) at 30, 50, 80, 155, and 190 cm depth with altogether 86 gas probes. Additionally the N 2 O emission into the atmosphere was measured in 20 closed chambers at the soil surface. Concurrently the soil temperature and soil water content were recorded in order to quantify their effects on the fate of N 2 O in the soil. Results of the continuous measurements between January and December 2006 were: N 2 O concentrations were highest in the deeper soil; maximum concentration was found at a depth of 80 cm, where the water content was high and the gas transport reduced. The highest N 2 O concentration was recorded after 'special events' like snowmelt, heavy rain, fertilization, and grubbing. The combination of fertilization and heavy rain led to an increase of up to 2,700 ppb in the subsoil.

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Section: Discussioncontrasting

confidence: 77%

“…reviews of Clough et al 2001;Heincke and Kaupenjohann 1999). This applies also for the N 2 O fluxes from the soil to the atmosphere (Reth et al 2005;Schürmann et al 2002). It is essential to characterize and to model the processes involved in the production and consumption, and the transport of N 2 O.…”

Section: Introductionmentioning

confidence: 99%

Whole-year-round Observation of N2O Profiles in Soil: A Lysimeter Study

Reth

Graf

Gefke

et al. 2007

Water Air Soil Pollut: Focus

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“…The most critical factor determining the reliability of the method in hot environmental conditions seems to be the length of the gas accumulation period. In the literature reported accumulation periods range from 2 to 3 min (Hans et al 2005;Reth et al 2005) until 1 h (Velthof et al 2003;van Groenigen et al 2005). Because in our study the rapid increase in gas concentration, the raise in temperature and the built-up of humidity in the cuvette, especially during the midday measurements, influenced emission fluxes (feed back mechanisms), we have shortened the accumulation period to 1 min.…”

Section: Discussionmentioning

confidence: 88%

Nitrogen and carbon losses from dung storage in urban gardens of Niamey, Niger

Předotová

Schlecht

Buerkert

2009

Nutr Cycl Agroecosyst

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Intensive vegetable production in urban and peri-urban agriculture (UPA) of West African cities is characterized by high nutrient inputs. However, little is known about nitrogen (N) and carbon (C) losses in these systems, in particular during the storage of manure, the main organic fertilizer in these systems. We therefore aimed at quantifying gaseous emissions of ammonia (NH 3 ), nitrous oxide (N 2 O), carbon dioxide (CO 2 ) and methane (CH 4 ) as well as leaching losses of C, N, phosphorus (P) and potassium (K) from animal manure stored in vegetable gardens of Niamey, Niger. During a first 3.5-month experiment in the hot dry season, cumulative gaseous N losses, measured with a closed-chamber system, were with 0.11 g kg -1 manure DM highest (P \ 0.05) in the uncovered control treatment accounting for 1.8% of total manure N. Nitrogen losses decreased by 72% under plastic sheet roofing and by 50% under roofing ? ground rock phosphate (RP) application at 333 g kg -1 manure DM. Carbon losses from manure amounted to 73 g kg -1 DM in the control and to 92 g kg -1 DM and 68 g kg -1 DM under roofing and under roofing ? RP, respectively. In a second 3.5-month experiment conducted in the rainy season, C losses from the control were 164 g kg -1 manure DM and reduced to 77 and 65% of the control by roofing and roofing ? RP, respectively. Leaching losses during the rainy season were only observed for the unroofed control and averaged 2.1 g C, 0.05 g N, 0.07 g P and 1.8 g K kg -1 manure DM.

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“…It is combined with other reduction functions related to soil nitrate content or soil temperature, which are used together to estimate N 2 O fluxes. For example, the DenNit (Reth et al 2005), ECOSSE (Smith et al 2010), and NOE (Hénault et al 2005) models used such functions. The F W function can be described as a continuous exponential curve starting at a WFPS value of 0.62 in the NOE and ECOSSE models, an arctangent function with a level off for WFPS [ 0.7-0.9 in DAYCENT (Del Grosso et al 2000), a sigmoid curve with half maximum N 2 O emissions at 60 % of the field capacity in DenNit, or a linear growing function starting at the drained upper limit in APSIM (Keating et al 2003).…”

Section: Introductionmentioning

confidence: 99%

A modeling approach of the relationship between nitrous oxide fluxes from soils and the water-filled pore space

2014

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International audienceNitrous oxide (N2O) fluxes can increase significantly following small increases in soil water-filled pore space (WFPS). Thus, it is essential to improve our knowledge of this crucial relationship to better model N2O emissions by soils. We studied how much the addition of a gas transport and a gas–liquid equilibrium module to the model of N2O emissions NOE could improve simulation results. A sensitivity analysis of the modified model (NOEGTE: gas transport and equilibrium) was first performed, and then the model was tested with published data of a wetting–drying experiment. Simulated N2O fluxes plotted against WFPS appeared to be bell-shaped during the 7 days simulated, combining the effects of the low N2O production for WFPS < 0.62, and the slow gas diffusion for WFPS > 0.95. The WFPS generating the maximum simulated N2O fluxes shifted with time, from 0.76 after 12 h, to 0.79 after 168 h, because of an increase over time of the gas concentration gradient between the soil surface and the atmosphere. NOEGTE appeared able to capture the pattern of N2O emissions monitored in the experimental data. In particular, N2O peaks during drying were well reproduced in terms of timing, but their magnitudes were often overestimated. They were attributed to the increasing gas diffusivity and N2O exchanges from the liquid phase to the gaseous phase

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DenNit – Experimental analysis and modelling of soil N2O efflux in response on changes of soil water content, soil temperature, soil pH, nutrient availability and the time after rain event

Cited by 28 publications

References 71 publications

Whole-year-round Observation of N2O Profiles in Soil: A Lysimeter Study

Whole-year-round Observation of N2O Profiles in Soil: A Lysimeter Study

Nitrogen and carbon losses from dung storage in urban gardens of Niamey, Niger

A modeling approach of the relationship between nitrous oxide fluxes from soils and the water-filled pore space

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