Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Buchkapitel |
| Titel (primär) | Untersuchungen zum N2O-Gehalt der Bodenluft und zur N2O-Emission sowie zum N2O-Transport mit dem Sickerwasser an landwirtschaftlich genutzten Böden in Lysimetern |
| Titel (sekundär) | Stoffflüsse und ihre regionale Bedeutung für die Landwirtschaft. Bericht über die 8. Lysimetertagung, Gumpenstein, 13.-14.4.1999 |
| Autor | Russow, R.; Knappe, S.; Haferkorn, U. |
| Quelle | BAL-Bericht |
| Erscheinungsjahr | 1999 |
| Department | BOPHY; BOFO |
| Seite von | 57 |
| Seite bis | 60 |
| Sprache | deutsch |
| Abstract | Soils, especially those with high nitrogen supply, are one of the main sources of the anthropogenic emission of nitrous oxide (N2O), an important trace gas with climatic relevance. Only part of the N2O formed in the soil is emitted into the atmosphere. A considerable proportion may be further reduced en route to the surface of the soil in anaerobic microsites to form molecular nitrogen, or mayowing to its good solubility in water - be removed in seepage. The lysimeter station at Brandis contains a host of online measuring and analysis equipment and is ideal for studying N2O formation and discharge as sampling can take place at various soil depths and all relevant parameters (water and nitrate content at different depths, nitrate and DOC content in the leachate) can also be recorded. We report on our initial findings concerning the N2O content in the soil atmosphere at various depths of monolithic cores of two soils (sandy-loess earth), as well as N2O emissions at the surface of these soils. Over the observation period (November 1996 - October 1998) both soils displayed higher levels of N2O in the soil air with increasing depth. At a depth of 50 cm, an average of < 2 ppv was measured, compared to 2-34 ppv N2O at a depth of 250 cm. The N2O emissions on the surface of the soil are not significantly related to these high concentrations. In fact, apart from a few peaks in spring (60-118 µg N/m2.h) they are very low, namely 1-5 µg N/m2.h. Although it is unclear what happens to the large amounts of N2O remaining in the soil air at lower depths, removal in the leachate seems a likely solution. We consequently measured the level of N2O in the leachate. According to the findings so far, leachate from sandy-loess earth contains up to 78 µg N/l. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=8352 |
| Russow, R., Knappe, S., Haferkorn, U. (1999): Untersuchungen zum N2O-Gehalt der Bodenluft und zur N2O-Emission sowie zum N2O-Transport mit dem Sickerwasser an landwirtschaftlich genutzten Böden in Lysimetern Stoffflüsse und ihre regionale Bedeutung für die Landwirtschaft. Bericht über die 8. Lysimetertagung, Gumpenstein, 13.-14.4.1999 BAL-Bericht Bundesanstalt für Alpenländische Landwirtschaft, Irdning, S. 57 - 60 |
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