Denitrification potential in subsoils: A mechanism to reduce nitrate leaching to groundwater

Jahangir, M. M. R.; Khalil, M.I.; Johnston, Paul; Cardenas, L. M.; Hatch, D. J.; Butler, Mark; Barrett, Maria; O'Flaherty, Vincent; Richards, Karl G.

doi:10.1016/j.agee.2011.04.015

Cited by 147 publications

(91 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This trend in emission is close to the trend of soil NO 3 --N on day 3 both in order and in relative magnitude (Figure 2 Krol et al (2015) who reported 0.9-1.3%. Differing emission factors in other studies could be due to soil type and climatic conditions, which can be important factors affecting N 2 O emissions (Rochette et al, 2008) and its conversion to N 2 , resulting in a lower emission factor (Jahangir et al, 2011;Jahangir et al, 2012). Different fodders, feed additives and grazing regimes may affect N concentrations in urine and dung, which can have a significant effect on N 2 O emissions (Oenema et al, 1997).…”

Section: N 2 O Emissions Over Timementioning

confidence: 94%

“…Anaerobic conditions will decrease nitrification whilst altering the N 2 O/N 2 ratio during denitrification. It is also possible that the higher C content added in the dung and the wet soil conditions may have promoted a more complete reduction of N 2 O to N 2 (Jahangir et al, 2012) There is also potential that the applied dung may have increased soil N immobilisation through the addition of large quantities of carbon (Hatch et al, 2000). Very little difference was found between the urine only, the CAN only and the urine & CAN treatments in terms of soil NH 4 + -N content.…”

Section: Net Cumulative N 2 O Emissions: Dung Urine and Can In Combimentioning

confidence: 99%

See 1 more Smart Citation

The interactive effects of fertiliser nitrogen with dung and urine on nitrous oxide emissions in grassland

Hyde¹,

Forrestal²,

Jahangir³

et al. 2016

Irish Journal of Agricultural and Food Research

Self Cite

View full text Add to dashboard Cite

Section: N 2 O Emissions Over Timementioning

confidence: 94%

Section: Net Cumulative N 2 O Emissions: Dung Urine and Can In Combimentioning

confidence: 99%

The interactive effects of fertiliser nitrogen with dung and urine on nitrous oxide emissions in grassland

Hyde¹,

Forrestal²,

Jahangir³

et al. 2016

Irish Journal of Agricultural and Food Research

Self Cite

View full text Add to dashboard Cite

“…Jahangir et al (2012) found that adding carbon to deeper soil horizons significantly enhances denitrification in those layers. Profiles of dissolved organic carbon (DOC) in deep vadose zones (down to 9 m below ground) under citrus orchards on thick vertisols versus sandy-loam in Israel were compared.…”

Section: Kurtzman Et Al: Soil-aquifer Phenomena Under Vertisolsmentioning

confidence: 96%

Soil–aquifer phenomena affecting groundwater under vertisols: a review

Kurtzman

Baram

Dahan

2016

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Vertisols are cracking clayey soils that (i) usually form in alluvial lowlands where, normally, groundwater pools into aquifers; (ii) have different types of voids (due to cracking), which make flow and transport of water, solutes and gas complex; and (iii) are regarded as fertile soils in many areas. The combination of these characteristics results in the unique soil-aquifer phenomena that are highlighted and summarized in this review. The review is divided into the following four sections: (1) soil cracks as preferential pathways for water and contaminants: in this section lysimeter-to basin-scale observations that show the significance of cracks as preferential-flow paths in vertisols, which bypass matrix blocks in the unsaturated zone, are summarized. Relatively fresh-water recharge and groundwater contamination from these fluxes and their modeling are reviewed; (2) soil cracks as deep evaporators and unsaturated-zone salinity: deep sediment samples under uncultivated vertisols in semiarid regions reveal a dry (immobile), saline matrix, partly due to enhanced evaporation through soil cracks. Observations of this phenomenon are compiled in this section and the mechanism of evapoconcentration due to air flow in the cracks is discussed; (3) impact of cultivation on flushing of the unsaturated zone and aquifer salinization: the third section examines studies reporting that land-use change of vertisols from native land to cropland promotes greater fluxes through the saline unsaturated-zone matrix, eventually flushing salts to the aquifer. Different degrees of salt flushing are assessed as well as aquifer salinization on different scales, and a comparison is made with aquifers under other soils; (4) relatively little nitrate contamination in aquifers under vertisols: in this section we turn the light on observations showing that aquifers under cultivated vertisols are somewhat resistant to groundwater contamination by nitrate (the major agriculturally related groundwater problem). Denitrification is probably the main mechanism supporting this resistance, whereas a certain degree of anion-exchange capacity may have a retarding effect as well.

show abstract

“…Some studies have shown that the highest rates of denitrification occur in the upper soil horizon (Kustermann et al, 2010;Jahangir et al, 2012), the extent of which depends on WC and WFPS. Soil WC can impact on many different soil processes such as mineralization, leaching, plant uptake and denitrification (Porporato et al, 2003).…”

Section: Nitrogen Leachate and Soil Propertiesmentioning

confidence: 99%

Impact of chemically amended pig slurry on greenhouse gas emissions, soil properties and leachate

Flynn¹,

Healy²,

Lanigan³

et al. 2013

Journal of Environmental Management

View full text Add to dashboard Cite

The effectiveness of chemical amendment of pig slurry to ameliorate phosphorus (P) losses in runoff is well studied, but research mainly has concentrated only on the runoff pathway. The aims of this study were to investigate changes to leachate nutrient losses, soil properties and greenhouse Morgan's phosphorus and water extractable P content of the soil to that of the soil-only treatment, indicating that they have the ability to reduce P loss in leachate following slurry application. There were no significant differences between treatments for nitrogen (N) or carbon (C) in leachate or soil, indicating no deleterious impact on reactive N emissions or soil C cycling. Chemical amendment posed no significant change to GHG emissions from pig slurry, and in the cases of alum and PAC, reduced cumulative N 2 O and CO 2 losses. Chemical amendment of land applied pig slurry can reduce P in runoff without any negative impact on nutrient leaching and GHG emissions. Future work must be conducted to ascertain if more significant reductions in GHG emissions are possible with chemical amendments.

show abstract

Denitrification potential in subsoils: A mechanism to reduce nitrate leaching to groundwater

Abstract: Understanding subsurface denitrification potential will give greater insights into landscape nitrate (

Cited by 147 publications

References 71 publications

The interactive effects of fertiliser nitrogen with dung and urine on nitrous oxide emissions in grassland

The interactive effects of fertiliser nitrogen with dung and urine on nitrous oxide emissions in grassland

Soil–aquifer phenomena affecting groundwater under vertisols: a review

Impact of chemically amended pig slurry on greenhouse gas emissions, soil properties and leachate

Contact Info

Product

Resources

About