|DOI / URL||link|
|Title (Primary)||Airborne nitrogen input at four locations in the German state of Saxony-Anhalt - measurements using the 15N-based ITNI-system|
|Author||Böhme, F.; Russow, R.; Neue, H.-U.;|
|Journal||Isotopes in Environmental and Health Studies|
The amount of atmospheric N deposition in Germany is actual rather uncertain. Estimates using standard methods indicate an N deposition of 30–35 kg N/ha × year. However, the results of long-term field experiments and newly by the ITNI (Integrated Total Nitrogen Input) system could prove a much higher N input of about 50–60 kg N/ha × year. The reason for this difference is that standard methods use wet-only or bulk collectors, which neglect gaseous and organic N deposition as well as direct N uptake by aerial plant parts. By contrast, the ITNI-system is able to measure the total atmospheric N input using the 15N isotope dilution method. The input of airborne N into a soil/plant system leads to a dilution of the abundance of a previously applied 15N tracer over a defined time period. The atmospheric N deposition can be calculated from this dilution.
To estimate the actual N input in Central Germany, ITNI measurements were carried out from autumn 1998 to autumn 2000 at four locations in the German state of Saxony-Anhalt. Atmospheric N depositions between 45 and 75 kg N/ha × year were determined depending on the location. These results closely match to N balances of longterm field experiments. Furthermore, a relationship was found between N deposition and the plant species used as well as plant development.
|Persistent UFZ Identifier||https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=5385|
|Böhme, F., Russow, R., Neue, H.-U. (2002):
Airborne nitrogen input at four locations in the German state of Saxony-Anhalt - measurements using the 15N-based ITNI-system
Isot. Environ. Health Stud. 38 (2), 95 - 102