Simplified denitrification models: Overview and properties

Heinen, M.

doi:10.1016/j.geoderma.2005.06.010

Cited by 193 publications

(173 citation statements)

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“…Denitrification is an electron-consuming and heterotrophic process (McLain and Martens 2006). Organic matter provides not only electrons for the reaction through mineralization, but also substrates for the growth and activity of denitrifiers (Heinen 2006). Thus, the amount of available organic matter is an important controlling factor (Tiedje 1988).…”

Section: Release Of the Intermediate Products Of Denitrificationmentioning

confidence: 99%

“…Thus, the amount of available organic matter is an important controlling factor (Tiedje 1988). Soil pH also affects denitrification (Heinen 2006), since it influences many physical, chemical and biological properties and processes in the soil (Š imek et al 2002). However, the effect of soil pH on denitrification is a source of contention.…”

Section: Release Of the Intermediate Products Of Denitrificationmentioning

confidence: 99%

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Soil pH was the main controlling factor of the denitrification rates and N₂/N₂O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)

Sun

Zhuge

Zhang

et al. 2012

Soil Science and Plant Nutrition

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Section: Release Of the Intermediate Products Of Denitrificationmentioning

confidence: 99%

Section: Release Of the Intermediate Products Of Denitrificationmentioning

confidence: 99%

Soil pH was the main controlling factor of the denitrification rates and N₂/N₂O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)

Sun

Zhuge

Zhang

et al. 2012

Soil Science and Plant Nutrition

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“…The values derived for dnit lim ranged from 0.80 to 0.93 (Fig. 4), which are at the upper end of the range 0.5-0.9 that was found for this threshold in reviews of denitrification models (Heinen 2006) and observations (Barton et al 1999). In all cases, dnit lim was close to WFPS DUL , although generally higher (average 5%) than WFPS DUL (Fig.…”

Section: Model Evaluationmentioning

confidence: 65%

Nitrous oxide emissions from grain production systems across a wide range of environmental conditions in eastern Australia

et al. 2016

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Abstract. Nitrous oxide (N 2 O) emissions from Australian grain cropping systems are highly variable due to the large variations in soil and climate conditions and management practices under which crops are grown. Agricultural soils contribute 55% of national N 2 O emissions, and therefore mitigation of these emissions is important. In the present study, we explored N 2 O emissions, yield and emissions intensity in a range of management practices in grain crops across eastern Australia with the Agricultural Production Systems sIMulator (APSIM). The model was initially evaluated against experiments conducted at six field sites across major grain-growing regions in eastern Australia. Measured yields for all crops used in the experiments (wheat, barley, sorghum, maize, cotton, canola and chickpea) and seasonal N 2 O emissions were satisfactorily predicted with R 2 = 0.93 and R 2 = 0.91 respectively. As expected, N 2 O emissions and emissions intensity increased with increasing nitrogen (N) fertiliser input, whereas crop yields increased until a yield plateau was reached at a site-and crop-specific N rate. The mitigation potential of splitting N fertiliser application depended on the climate conditions and was found to be relevant only in the southern grain-growing region, where most rainfall occurs during the cropping season. Growing grain legumes in rotation with cereal crops has great potential to reduce mineral N fertiliser requirements and so N 2 O emissions. In general, N management strategies that maximise yields and increase N use efficiency showed the greatest promise for N 2 O mitigation.

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“…Oxygen diffusion coefficients are non-5 linear in relation to the air-filled pore space, so a steep non-linear relationship is used for the water content 6 reduction function (Grundmann and Rolston, 1987;Heinen, 2006), as shown in Fig. 6a …”

Section: Soil Organic Nitrogenmentioning

confidence: 99%

Analysis of carbon and nitrogen dynamics in riparian soils: Model development

Brovelli¹,

Batlle-Aguilar²,

Barry³

2012

Science of The Total Environment

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1The quality of riparian soils and their ability to buffer contaminant releases to aquifers and streams are 2 connected intimately to moisture content and nutrient dynamics, in particular of carbon (C) and nitrogen (N). 3A multi-compartment model -named the Riparian Soil Model (RSM) -was developed to help investigate 4 the influence and importance of environmental parameters, climatic factors and management practices on 5 soil ecosystem functioning in riparian areas. The model improves existing tools, in particular regarding its 6 capability to simulate a wide range of temporal scales, from days to centuries, along with its ability to predict 7 the concentration and vertical distribution of dissolved organic matter (DOM). It was found that DOM 8 concentration controls the amount of soil organic matter (SOM) stored in the soil as well as the respiration 9 rate. The moisture content was computed using a detailed water budget approach, assuming that within each 10 time step all the water above field capacity drains to the layer underneath, until it becomes fully saturated. A 11 mass balance approach was also used for nutrient transport, whereas the biogeochemical reaction network 12 was developed as an extension of an existing C and N turnover model. Temperature changes across the soil 13 profile were simulated analytically, assuming periodic temperature changes in the topsoil. Sustainable management of riparian soils is of primary importance to preserve natural ecosystem 3 functioning. Riparian zones are sources of ecosystem functions and services including biodiversity hotspots, 4 water quality enhancement, and recreation sites (Brinson et al., 1981;Naiman and Decamps, 1997). 5Throughout the world, the ecological condition of natural riparian systems has declined due to a number of 6 factors, including streamflow regulation, floodplain development, channelization, and the spread of non-7 native species (Naiman and Decamps, 1997;Naiman et al., 2005). Consequently, restoration of riparian areas 8 has become a global management priority (Hughes et al., 2005;Hughes and Rood, 2003; Webb and Erskine, 9 2003). 10 Soil ecosystem functioning is connected intimately to soil organic matter (SOM) turnover, a set of complex 11 and intertwined biological processes that recycle biotic residues (such as plant litter, dead organisms, etc.) to 12 inorganic molecules. Environmental and climatic factors affect decomposition rates, the biological activity of 13 the soil and ultimately SOM cycling (Laio et al., 2001;Porporato et al., 2003). Soil moisture has a direct 14 influence on the processes mediated by the soil biota (pedofauna, bacteria, fungi, etc.) because optimal 15 decomposition rates are achieved only in a narrow saturation range (Bell et al., 2008; Ju et al., 2006; 16 Porporato et al., 2003;Van Gestel et al., 1992). Owing to the strong dependence of ecological processes on 17 soil moisture, linear and non-linear interactions and feedbacks exist between hydrological processes and soil 18 ecosystem functionin...

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Simplified denitrification models: Overview and properties

Cited by 193 publications

References 69 publications

Soil pH was the main controlling factor of the denitrification rates and N₂/N₂O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)

Soil pH was the main controlling factor of the denitrification rates and N₂/N₂O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)

Nitrous oxide emissions from grain production systems across a wide range of environmental conditions in eastern Australia

Analysis of carbon and nitrogen dynamics in riparian soils: Model development

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Simplified denitrification models: Overview and properties

Cited by 193 publications

References 69 publications

Soil pH was the main controlling factor of the denitrification rates and N2/N2O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)

Soil pH was the main controlling factor of the denitrification rates and N2/N2O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)

Nitrous oxide emissions from grain production systems across a wide range of environmental conditions in eastern Australia

Analysis of carbon and nitrogen dynamics in riparian soils: Model development

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Product

Resources

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Soil pH was the main controlling factor of the denitrification rates and N₂/N₂O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)

Soil pH was the main controlling factor of the denitrification rates and N₂/N₂O emission ratios in forest and grassland soils along the Northeast China Transect (NECT)