title: Nutrient loading of a forest soil : A manipulative approach using rooted experimental chambers.
abstract: During July 1988 rooted and non-rooted experimental chambers were established in a Norway spruce (Picea abies. Karst) stand in south Devon U.K. Replicates were supplemented with ammonium and nitrate. The leachates were analysed to monitor the release of mineral-N species and cations over the 17-week experimental period. Ammonium treatments leached 300% more calcium and magnesium than controls. The onset of nitrification resulted in a decrease in sodium losses from ammonium treatments reflecting a decrease in the exchanging capacity of the soil solution. These results are discussed in relation to mineral ion leaching in soils subjected to increesed N-loading, and the ability of soils to buffer these perturbations.
authors.affiliation: Department of Biological Sciences, Hatherly Laboratory, University of Exeter, EX4 4PS, Exeter, Devon, England.
authors.forename: T W
authors.initials: TW
authors.lastname: Willison
authors.affiliation: Department of Biological Sciences, Hatherly Laboratory, University of Exeter, EX4 4PS, Exeter, Devon, England.
authors.forename: P R
authors.initials: PR
authors.lastname: Splatt
authors.affiliation: Department of Biological Sciences, Hatherly Laboratory, University of Exeter, EX4 4PS, Exeter, Devon, England.
authors.forename: J M
authors.initials: JM
authors.lastname: Anderson
keywords: Cation leaching; Forest soils; Nitrification; Nitrogen loading; Norway spruce