In the North Tyrolean Limestone Alps a site was investigated over a four-year period (1998-2001) in order to assess the nitrogen saturation status, the nitrogen budget (quantification of the net ...uptake of nitrogen by the canopy and of the nitrogen mineralization, nitrogen uptake from roots and N^sub 2^O emission rates, proof of the origin of nitrate in the soil water with stable isotope analyses), and the effects of the actual nitrogen input on ground water quality. The main goals were to quantify the nitrogen input rate, the nitrogen pools in above-ground and below-ground compartments, nitrogen turnover processes in the soil as well as the output into the groundwater and into the atmosphere. The findings are based on continuous and discontinuous field measurements as well as on model results. While nitrogen input exceeded the Critical Loads of the WHO (1995), nitrogen deficiency and nutrient imbalances were verified by needle analyses. The atmospheric input of inorganic nitrogen was higher than the nitrogen output in 50 cm soil depth. A tracer experiment with^sup 15^N helped to prove that not more than half of the applied nitrate could be discharged. This allows the conclusion that nitrogen is stored in the system and that the site cannot yet be said to be saturated with nitrogen. The same result was also obtained by modelling. In addition, it was proved that the nitrogen discharge did not stem from deposition but from processes within the system.PUBLICATION ABSTRACT
In vielen Fällen sind österreichspezifische Studien zu Klimawandelfolgen wenig konkret in Bezug auf analysierte Klimawandelszenarios. Dies macht spezifische Aussagen zur Bandbreite möglicher ...Klimawandelauswirkungen und das Abschätzen von möglichen bedeutsamen Schwellenwerten für klimatische Veränderungen bzw. der Unsicherheit von Klimawandelfolgen schwierig.
Die Auswirkungen des Klimawandels auf die Landwirtschaft sind regional unterschiedlich
In kühleren, niederschlagsreicheren Gebieten, beispielsweise im Nördlichen Alpenvorland, steigert wärmeres Klima weitgehend das durchschnittliche Ertragspotenzial von Nutzpflanzen. In niederschlagsärmeren Gebieten nördlich der Donau sowie im Osten und Südosten Österreichs werden zunehmende Trockenheit und Hitze das durchschnittliche Ertragspotenzial, vor allem unbewässerter Sommerkulturen, langfristig verringern und die Ausfallsrisiken erhöhen. Das klimatische Anbaupotenzial wärmeliebender
Towards an European classification of terrestrial humus forms Jabiol , Bernard (INRA , NANCY CEDEX (France). UMR 1092 UMR INRA / ENGREF : Laboratoire d'Etudes des Ressources Forêt-Bois); Zanella , Augusto (Università degli Studi di Padova(Italie). Agronomy, Department TeSAF); Englisch , Michael (Federal Research and Training Centre for Forests, Natural Hazards and Landscape(Autriche). Department of Forest Ecology) ...
2004
Conference Proceeding
