Denitrification from the horticultural peats: effects of pH, nitrogen, carbon, and moisture contents

Amha, Yosef; Bohne, H.

doi:10.1007/s00374-010-0536-y

Cited by 34 publications

(18 citation statements)

References 29 publications

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“…Improved living conditions for microorganisms by increased soil moisture may cause enhanced activity of nitrifying bacteria (Jha et al 1996). An increase in water-filled pore volume over 70 % may lead to reduced soil aeration resulting in low oxygen concentrations to anaerobic conditions which support denitrification (Amha and Bohne 2011;Ruser et al 2006;Scheer et al 2008). An increased soil microbial activity may lead to a decrease in the soil oxygen concentration as well (Loecke and Robertson 2009;Potthoff et al 2005).…”

Section: Regionmentioning

confidence: 99%

“…Low oxygen contents and anaerobic conditions caused by high soil water content can lead to intensification of denitrification processes (Beare et al 2009). N 2 O emissions arising from denitrification processes increase strongly at a water filled pore volume over 70 % (Amha and Bohne 2011;Ruser et al 2006). However, a nearly complete filling of the pore volume over a long time may lead to a decrease of N 2 O emissions since, under strict anaerobic conditions, the intermediate in denitrification N 2 O is completely deoxidised to N 2 (Huang et al 2007).…”

Section: Overview Of Experimentsmentioning

confidence: 99%

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Irrigation, soil organic carbon and N2O emissions. A review

Trost

Prochnow

Drastig

et al. 2013

Agron. Sustain. Dev.

238

128

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International audienceIrrigation has a critical role for crop production worldwide. In particular, irrigation is a major issue due to the growing food demand and climate change. Irrigation affects yields and the emission of greenhouse gases such as CO2 and N2O by soils. Here, we review the effect of irrigation on soil organic carbon and N2O emissions. We analysed 22 investigations in various regions of the world. Interactions between irrigation, soil and management factors are described. The main points are: (1) The influence of irrigation is strongly dependent on climate and initial soil organic carbon content. For instance, irrigation of cultivated desert soils led to an average increase of 90 % to over 500 % of soil organic carbon. (2) Irrigation of semiarid regions increases soil organic carbon by 11 % to 35 %. (3) No consistent effects of irrigation were observed in humid regions. In many cases, N2O emissions increase after precipitation or irrigation. (4) Comparison of N2O emissions from irrigated and non-irrigated fields shows that availability of reactive nitrogen compounds controls increased N2O emissions under irrigation, in most cases. Here, increases of about 50 % to 140 % in N2O emissions were reported

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Section: Regionmentioning

confidence: 99%

Section: Overview Of Experimentsmentioning

confidence: 99%

Irrigation, soil organic carbon and N2O emissions. A review

Trost

Prochnow

Drastig

et al. 2013

Agron. Sustain. Dev.

238

128

View full text Add to dashboard Cite

show abstract

“…This suggests that low availability of mineralisable carbon may have further limited denitrifier activity in OS. 63 Land management activities including grazing and manure application have been shown to increase the lability of organic C 64 leading to enhanced denitrification activity and N 2 O emissions from grasslands. 32,65 Mowing, which is applied to the SIG land use twice per year, may have also supported enhanced denitrifier activity through the release of DOC and mineral N in mown grasslands.…”

Section: Controlling Factorsmentioning

confidence: 99%

Relative Magnitude and Controls of in Situ N₂ and N₂O Fluxes due to Denitrification in Natural and Seminatural Terrestrial Ecosystems Using ¹⁵N Tracers

Sgouridis

Ullah

2015

Environ. Sci. Technol.

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“…Thus, peat soils could potentially serve as denitrification beds for CWs. However, there are few studies about the performance of peat soils as denitrification bed materials [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Nitrate Attenuation in Degraded Peat Soil-Based Constructed Wetlands

Kleimeier

Liu

Rezanezhad

et al. 2018

Water

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Constructed wetlands (CWs) provide favorable conditions for removing nitrate from polluted agricultural runoff via heterotrophic denitrification. Although the general operability of CWs has been shown in previous studies, the suitability of peat soils as a bed medium for a vertical flow through a system for nitrate attenuation has not been proven to date. In this study, a mesocosm experiment was conducted under continuous flow with conditions aiming to quantify nitrate (NO 3 −) removal efficiency in degraded peat soils. Input solution of NO 3 − was supplied at three different concentrations (65, 100, and 150 mg/L). Pore water samples were collected at different depths and analyzed for NO 3 − , pH, and dissolved N 2 O concentrations. The redox potential (Eh) was registered at different depths. The results showed that the median NO 3-N removal rate was 1.20 g/(m 2 •day) and the median removal efficiency was calculated as 63.5%. The nitrate removal efficiency was affected by the NO 3 − supply load, flow rate, and environmental boundary conditions. A higher NO 3 − removal efficiency was observed at an input NO 3 − concentration of 100 mg/L, a lower flow rate, and higher temperature. The results of pore water pH and NO 3 − and N 2 O levels from the bottom of the mesocosm suggest that N 2 is the dominant denitrification product. Thus, degraded peat soils showed the potential to serve as a substrate for the clean-up of nitrate-laden agricultural runoff.

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Denitrification from the horticultural peats: effects of pH, nitrogen, carbon, and moisture contents

Cited by 34 publications

References 29 publications

Irrigation, soil organic carbon and N2O emissions. A review

Irrigation, soil organic carbon and N2O emissions. A review

Relative Magnitude and Controls of in Situ N₂ and N₂O Fluxes due to Denitrification in Natural and Seminatural Terrestrial Ecosystems Using ¹⁵N Tracers

Nitrate Attenuation in Degraded Peat Soil-Based Constructed Wetlands

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Denitrification from the horticultural peats: effects of pH, nitrogen, carbon, and moisture contents

Cited by 34 publications

References 29 publications

Irrigation, soil organic carbon and N2O emissions. A review

Irrigation, soil organic carbon and N2O emissions. A review

Relative Magnitude and Controls of in Situ N2 and N2O Fluxes due to Denitrification in Natural and Seminatural Terrestrial Ecosystems Using 15N Tracers

Nitrate Attenuation in Degraded Peat Soil-Based Constructed Wetlands

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Product

Resources

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Relative Magnitude and Controls of in Situ N₂ and N₂O Fluxes due to Denitrification in Natural and Seminatural Terrestrial Ecosystems Using ¹⁵N Tracers