Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
1999
Abstract
The complex character of variations in acidity and cation exchange properties of forest podzols under the impact of atmospheric emissions from Pechenganikel plant in the Kola Peninsula was revealed using correlation and regression analyses. The high level of acidity and the depletion of upper horizons in exchangeable bases attest for the anthropogenic acidification of podzols in the affected zone of the plant.
Authors
Leif Aarvik Alf BakkeAbstract
Presentasjon av sommerfuglmateriale fra lysfellefangster i Lierne og Namsos i 1996.
Authors
D. Lindgren Tim J. Mullin Y.Q. ZhengAbstract
No abstract has been registered
Authors
Inger Aandahl Raastad Jan MulderAbstract
Effects of (1) the addition of 35 kg N ha-1yr-1(as NH4NO3) and (2) interception of throughfall and litterfall by means of a roof on concentrations, chemical characteristics and dynamics of dissolved organic matter (DOM) in acid forest soils (podzols) were studied at Grdsjn, Sweden. A non-manipulated catchment served as a reference. After 4 yr of treatment no significant effects of either manipulation were found on concentrations and characteristics of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON). The variability of these parameters within catchments appeared to be of the same order of magnitude as the variability between catchments. At all sites, DON contributed more than 70% of the total dissolved nitrogen. In general, the proportion of hydrophilic DOC increased with depth. In contrast, to other studies the C/N ratio of DOM at Grdsjn did not show a clear pattern with depth. Other studies in SE U.S.A. have suggested that relatively low C/N ratios at depth are due to increased contribution of hydrophilic neutrals to DOC. However, this fraction appears to be small in temperate and boreal spruce forest soils, including Grdsjn.
Authors
Gunnar Ogner Torild Wickstrøm Gabriele Remedios Svein Gjelsvik Guro Randem Hensel Jan Erik Jacobsen Monica Fongen Espen Skretting Britt SørlieAbstract
This article describes in brief the chemical analytical program at The Norwegian Forest Research Institute in 2000. Due to a continuous effort to develop and to improve analytical methods to meet the demands of forest research in Norway, the four earlier summaries of our methods (Ogner et al. 1975, 1977, 1984, 1991) are now outdated. This article replaces the previous ones and describes only those procedures currently being used for the analysis of water, plant and soil samples
Authors
O. Janne KjønaasAbstract
Mixed bed ion exchange resin bags have previously been used in studies of soil N transformation rates with NH4-N and NO3-N being adsorbed from the solution percolating through the incubated soil core. An evaluation of the in situ adsorption efficiency of mixed bed resin bags was performed by comparing dissolved inorganic nitrogen (DIN, sum of NH4-N NO3-N) accumulated in resins with DIN fluxes in throughfall (TF) and with DIN concentrations in soil water. A significant correlation was found between DIN fluxes in TF and accumulated DIN in resins placed at the soil surface (r2= 0.92 for NO3-N, r2=0.86 for NH4-N, p0.001). The ratio of accumulated DIN in resins to DIN flux in TF was significantly affected by season. A low but significant correlation was found between NO3-N concentrations in soil water and NO3-N contents in resins deployed in the bottom of soil cylinders (r2=0.34, p0.01), however, when only the winter periods were taken into account, the correlation improved (r2=0.72, p0.001). As little water and few nutrients are removed from the soil water by the vegetation during the dormant season, the conditions inside and outside the core were more comparable. For NH4-N there was no correlation between accumulated amounts in the resins and concentrations in soil water sampled at 13 cm and 20 cm depth, respectively, probably due to the strong depth gradient in the NH4-N concentrations of the soil. Although the resin bags were unable to adsorb all the incoming DIN, they gave valuable information on small scale input of N and small scale differences in NO3-N leaching.
Authors
Tonje Økland Rune Halvorsen Økland Eiliv SteinnesAbstract
No abstract has been registered
Authors
Tore SkrøppaAbstract
No abstract has been registered
Authors
Lennart Eriksson Klas ÖsterbergAbstract
No abstract has been registered
Authors
Rune Halvorsen Økland Knut Rydgren Tonje ØklandAbstract
No abstract has been registered