Title
Foliar nitrogen uptake from wet deposition and the relation with leaf wettability and water storage capacity Foliar nitrogen uptake from wet deposition and the relation with leaf wettability and water storage capacity
Author
Faculty/Department
Faculty of Sciences. Bioscience Engineering
Publication type
article
Publication
Dordrecht ,
Subject
Biology
Source (journal)
Water, air, and soil pollution. - Dordrecht
Volume/pages
219(2011) :1/4 , p. 43-57
ISSN
0049-6979
ISI
000291249700005
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
This study assessed the foliar uptake of 15N-labelled nitrogen (N) originating from wet deposition along with leaf surface conditions, measured by wettability and water storage capacity. Foliar 15N uptake was measured on saplings of silver birch, European beech, pedunculate oak and Scots pine and the effect of nitrogen form (NH4+ or NO3−), NH4+ to NO3− ratio and leaf phenology on this N uptake was assessed. Next to this, leaf wettability and water storage capacity were determined for each tree species and phenological stage, and the relationship with 15NH4+ and 15NO3− uptake was examined. Uptake rates were on average five times higher (p < 0.05) for NH4+ than for NO3− and four times higher for deciduous species than for Scots pine. Developing leaves showed lower uptake than fully developed and senescent leaves, but this effect was tree species dependent. The applied NH4+ to NO3− ratio did only affect the amount of N uptake by senescent leaves. The negative correlation between measured leaf contact angles and foliar N uptake demonstrates that the observed effects of tree species and phenological stage are related to differences in leaf wettability and not to water storage capacity.
E-info
https://repository.uantwerpen.be/docman/iruaauth/a22316/49b3f024fca.pdf
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