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Nitrous oxide fluxes, soil oxygen, and denitrification potential of urine- and non-urine-treated soil under different irrigation frequencies
(American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Inc., 2016-07)
© American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. 5585 Guilford Rd., Madison, WI 53711 USA. All rights reserved. Despite increased use of irrigation to improve forage ...
Nitrous oxide fluxes and soil oxygen dynamics of soil treated with cow urine
(Soil Science Society of America, 2017-04-20)
Ruminant urine deposition onto pasture creates hot-spots where emissions of nitrous oxide (N₂O) are produced by aerobic and anaerobic microbial pathways. However, limited measurements of in situ soil oxygen (O₂)-N₂O ...
Enhancement of subsoil denitrification using an electrode as an electron donor
(Elsevier, 2017-12)
Laboratory culture studies have demonstrated that some microbial strains can use electrons generated by electrodes in the denitrification reaction. To test whether the native soil microbiota can use electrode electrons for ...
Irrigation of DOC-rich liquid promotes potential denitrification rate and decreases N₂O/(N₂O+N₂) product ratio in a 0–2 m soil profile
(Elsevier, 2017-03)
Lack of dissolved organic carbon (DOC) is generally one of the key factors limiting denitrification in subsoil beneath the root zone. Despite a number of laboratory DOC amendment studies, the effects of in situ DOC ...
Flooding-induced N₂O emission bursts controlled by pH and nitrate in agricultural soils
(Elseiver, 2014-02)
Agricultural soils are a major source of the greenhouse gas nitrous oxide (N₂O) to the atmosphere. Increasing frequency and severity of flooding as predicted for large intensively cropped areas may promote temporary ...
Land management between crops affects soil inorganic nitrogen balance in a tropical rice system
(Springer Verlag, 2014-12)
Sustainable production of lowland rice (Oryza sativa L.) requires minimising undesirable soil nitrogen (N) losses via nitrate (NO₃⁻) leaching and denitrification. However, information is limited on the N transformations ...
Influence of soil bulk density and matric potential on microbial dynamics, inorganic N transformations, N₂O and N₂ fluxes following urea deposition
(Elsevier Ltd., 2013-10)
Transformation of ruminant urine-nitrogen (N) can contribute to negative environmental outcomes such as nitrate leaching which leads to eutrophication of waterways and production of nitrous oxide (N₂O), a greenhouse gas. ...
Rice root Fe plaque enhances paddy soil N₂O emissions via Fe(II) oxidation-coupled denitrification
(Elsevier, 2019-12-01)
Iron (Fe) plaque, defined as a film of poorly crystalline Fe oxides deposited on the surface of rice roots, potentially mediates paddy-soil N₂O emissions. The aims of this study were to test if, and how, Fe plaque affects ...
Soil type, bulk density and drainage effects on relative gas diffusivity and N₂O emissions
(CSIRO, 2020-11-01)
Nitrous oxide (N₂O), a greenhouse gas, contributes to stratospheric ozone depletion. Agricultural fertiliser use and animal excreta dominate anthropogenic N₂O emissions. Soil relative gas diffusivity (Dp/Do) has been used ...
Urea treatment decouples intrinsic pH control over N₂O emissions in soils
(Elsevier, 2021-12)
Soil N₂O emission potential is commonly investigated under idealized denitrifying conditions (e.g. nitrate-N supplied and anaerobic soil), with pH commonly identified as a major determinant of N₂O emission potential. ...