Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
1995
Authors
Richard Frederic Wright J.G.M. Roelofs M. Bredemeier Kai Blanck Andries W. Boxman Bridget A. Emmett Per Gundersen H. Hultberg O. Janne Kjønaas Filip Moldan Albert Tietema N. van Breemen H.F.G. van DijkAbstract
In large regions of Europe and eastern North America atmospheric deposition of inorganic nitrogen compounds has greatly increased the natural external supply to forest ecosystems. This leads to nitrogen saturation, in which availability of inorganic nitrogen is in excess of biological demand and the ecosystem is unable to retain all incoming nitrogen. The large-scale experiments of the NITREX project (nitrogen saturation experiments) are designed to provide information regarding the patterns and rates of responses of coniferous forest ecosystems to increases in N deposition and the reversibility and recovery of impacted ecosystems following reductions in N deposition. The nitrogen input-output data from the NITREX sites are consistent with the general pattern of nitrogen fluxes from forest ecosystems in Europe. At annual inputs of less than about 10 kg ha-1 year-1, nearly all the nitrogen is retained and outputs are very small. At inputs above about 25 kg ha-1 year-1 outputs are substantial. In the range 10-25 kg ha-1 year-1 these forest ecosystems undergo a transition to nitrogen saturation. The 10 kg ha-1 year-1 apparently represents the minimum threshold for nitrogen saturation.The NITREX experiments indicate that nitrogen outputs respond markedly across the 10-25 kg ha-1 year-1 range of inputs. In contrast, the nutrient concentrations in foliage, a measure of tree response, is delayed by several years. Nitrogen saturation can apparently be induced or reversed within only a few years, at least with respect to the commonly used diagnostic of nitrogen saturation-nitrogen output in leachate or runoff.
Authors
Valentina P. Vetrova Galina G. Polyakova Rida M. Matrenina Natali V. Pashenova Vladimir I. OsipovAbstract
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Authors
Peter Constabel Gregory Pearce Barry McGurl Steven Doares Martha Orozco-Cardenas Daniel Bergey Gregg Howe Clarence RyanAbstract
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Authors
Susanne HardingAbstract
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Authors
D. WainhouseAbstract
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Franck Brignolas François Lieutier A. YartAbstract
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Authors
Heli ValkamaAbstract
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Authors
Maarit Kytö Pekka Niemelä Erkki AnnilaAbstract
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Authors
Natali V. Pashenova Valentina P. Vetrova Rida M. Matrenina E.N. AphanasovaAbstract
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Authors
Martti Vuorinen Märt Hanso Timo Kurkela J.K. Holopainen P. KainulainenAbstract
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