DISSIMILATORY REDUCTION OF <sup>15</sup>N-LABELED NITRATE IN THE PRESENCE OF NONLABELED NO OR N<sub>2</sub>O

Nômmik, Hans; Melin, J.

doi:10.4141/cjss84-003

Cited by 6 publications

(1 citation statement)

References 13 publications

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“…However, in soils, which have an unusual source of δ 15 N, the source can influence the δ 15 N of soils and plants (18). One example for such an unusual δ 15 N source is fertilizer N applied on agricultural (19) or forested ecosystems (20). For soils at rehabilitated lignite mining sites, we hypothesized that GOM may be such an unusual N source with possibly a distinct δ 15 N signature compared to plant litter.…”

Section: Introductionmentioning

confidence: 99%

Origin of Nitrogen in Reforested Lignite-Rich Mine Soils Revealed by Stable Isotope Analysis

Chabbi

Sébilo

Rumpel

et al. 2008

Environ. Sci. Technol.

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Restoration of the nitrogen cycle is an important step in the recovery of an ecosystem after mining. Carbon and nitrogen in rehabilitated lignite containing mine soils can be derived from plant material as well as from lignite inherent to the parent substrate. We assessed the use elemental and stable carbon and nitrogen isotope measurements to trace the orgin of soil nitrogen and applied these techniques to elucidate the origin of mineral N in the soil and the soil solution. The conceptual approach of this study included physical fractionation in addition to sampling of vegetation and soil from a lignite-containing mine site rehabilitated in 1985 with Pinus Nigra. We studied the elemental and isotopic composition of bulk samples as well as isolated fractions and soil solution. Our data indicate that the stable carbon and nitrogen isotopic composition of the soil samples are the result of mixing between plant material and substrate inherent lignite. delta15N isotopes may be used as indicators of nitrogen contribution from plants to solid samples as well as soil solution. N-isotope composition of ammonia shows low spatial and interannual variability, despite strong concentration changes. Plant-derived nitrogen contributes in higher amounts to the soil solution compared to the bulk mineral soil.

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Section: Introductionmentioning

confidence: 99%

Origin of Nitrogen in Reforested Lignite-Rich Mine Soils Revealed by Stable Isotope Analysis

Chabbi

Sébilo

Rumpel

et al. 2008

Environ. Sci. Technol.

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Organism specific denitrification in samples of an Udifluvent with different nitrate concentrations

Munch¹

1989

J Plant Nutrition & Soil

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Model experiments were carried out to elucidate the interrelations between the ratio of N2O to N2 gases released by the denitrification of different amounts of nitrate on the one hand and of the activity of bacterial populations on the other hand. Soil samples amended with 2 different amounts of nitrate were sterilized, inoculated with either their natural bacterial population or by strains of denitrifying soil bacteria and incubated anaerobically in gas‐tight flasks. Results of these experiments are: The composition of denitrification gases (N2O, NO, N2) was exclusively caused by the species of the active microorganism in the soil: the nitrate concentration only influenced the denitrification rate, but not the N2O/N2 ratio of each organism. The amounts of nitrite formed transitorily were also specific for the type of organism. These amounts of nitrite influenced neither the emission of N2O (and NO) nor the ratio of N2O to N2 or of N2O to consumption of nitrate. The N2O formation depended primarily on the microbial soil population and secondly on the nitrate concentration in correlation with the type of the denitrifying population.

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Climate Change with Increasing N2O Fluxes

Singh

2000

Trace Gas Emissions and Plants

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DISSIMILATORY REDUCTION OF ¹⁵N-LABELED NITRATE IN THE PRESENCE OF NONLABELED NO OR N₂O

Cited by 6 publications

References 13 publications

Origin of Nitrogen in Reforested Lignite-Rich Mine Soils Revealed by Stable Isotope Analysis

Origin of Nitrogen in Reforested Lignite-Rich Mine Soils Revealed by Stable Isotope Analysis

Organism specific denitrification in samples of an Udifluvent with different nitrate concentrations

Climate Change with Increasing N2O Fluxes

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DISSIMILATORY REDUCTION OF 15N-LABELED NITRATE IN THE PRESENCE OF NONLABELED NO OR N2O

Cited by 6 publications

References 13 publications

Origin of Nitrogen in Reforested Lignite-Rich Mine Soils Revealed by Stable Isotope Analysis

Origin of Nitrogen in Reforested Lignite-Rich Mine Soils Revealed by Stable Isotope Analysis

Organism specific denitrification in samples of an Udifluvent with different nitrate concentrations

Climate Change with Increasing N2O Fluxes

Contact Info

Product

Resources

About

DISSIMILATORY REDUCTION OF ¹⁵N-LABELED NITRATE IN THE PRESENCE OF NONLABELED NO OR N₂O