Počet záznamů: 1
Experimental addition of nitrogen to a whole forest ecosystem at Gardsjon, Sweden (NITREX): Nitrate leaching during 26 years of treatment
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SYSNO ASEP 0495419 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Experimental addition of nitrogen to a whole forest ecosystem at Gardsjon, Sweden (NITREX): Nitrate leaching during 26 years of treatment Tvůrce(i) Moldan, Filip (UEK-B) RID
Jutterstrom, S. E. A-K. (SE)
Hruška, Jakub (UEK-B) RID, SAI, ORCID
Wright, R. (NO)Celkový počet autorů 4 Zdroj.dok. Environmental Pollution. - : Elsevier - ISSN 0269-7491
Roč. 242, NOV (2018), s. 367-374Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova acid deposition ; magic model ; european forests ; organic-carbon ; soil-water ; catchment ; chemistry ; dynamics ; runoff ; responses ; Acid deposition ; Nitrogen saturation ; Surface water ; Soil ; Catchment Vědní obor RIV EH - Ekologie - společenstva Obor OECD Environmental sciences (social aspects to be 5.7) CEP GA16-11571S GA ČR - Grantová agentura ČR GA15-08124S GA ČR - Grantová agentura ČR Institucionální podpora UEK-B - RVO:86652079 UT WOS 000446150300040 DOI 10.1016/j.envpol.2018.06.093 Anotace Chronic high deposition of nitrogen (N) to forest ecosystems can lead to increased leaching of inorganic N to surface waters, enhancing acidification and eutrophication. For 26 years nitrogen has been added as ammonium nitrate (NH4NO3) at 40 kg N ha(-1) yr(-1) to a whole forested catchment ecosystem at Gardsjon, Sweden, to experimentally simulate the transition from a N-limited to N-rich state. Over the first 10 years of treatment there was an increasing amount of nitrate (NO3-) and to a lesser extent ammonium (NH4+) lost in runoff, but then N leaching stabilised, and for the subsequent 16 years the fraction of N added lost in runoff remained at 9%. NO3- concentrations in runoff were low in the summer during the first years of treatment, but now are high throughout the year. High frequency sampling showed that peaks in NO3- concentrations generally occurred with high discharge, and were enhanced if high discharge coincided with occasions of N addition. Approximately 50% of the added N has gone to the soil. The added N is equivalent to 140 years of ambient N deposition. At current ambient levels of N deposition there thus appears to be no immediate risk of N saturation at this coniferous forest ecosystem, and by inference to other such N-limited forests in Scandinavia. (C) 2018 Elsevier Ltd. All rights reserved. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2019
Počet záznamů: 1