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| Titel |
Can subsoil denitrification reduce groundwater nitrate pollution and atmospheric N2O emissions? |
| VerfasserIn |
Mohammad Mofizur Rahman Jahangir, Mohammad Ibrahim Khalil, Laura Cardenas, David Hatch, Paul Johnston, Karl Richards |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250032240
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| Zusammenfassung |
| Denitrification, a biological nitrate removal pathway, can control the availability of NO3-
for leaching to the receptors but it is not only a natural pathway for excess NO3-
elimination but also contributes to the emissions of N2O, a potent greenhouse gas.
Denitrification potential and N2:N2O+N2 ratios were investigated in intact soil cores
collected at 0-10, 45-55 and 120-130 cm soil depths where groundwater table was
approximately 2 m below ground level. The soil was a moderately well drained loam to clay
loam Gleysol under a grazing pasture in South Eastern Ireland. Three individual
experiments were carried out by amending the soil with (i) 90 mg NO3--N as
KNO3, (ii) -(i) + 150 mg glucose-C, (iii) -(i) + 150 mg DOC, kg-1 dry soil. An
automated laboratory incubation system was used to simultaneously measure N2O
and N2 at 15-C at 3% moisture content above field capacity. N2O fluxes differed
significantly (p |
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