Abstract:ZusammenfassungFourteen European forest soils from the boreal to the mediterranean climate on different parent materials were investigated with respect to their ability to store NH4+ in exchangeable form, using sorption isotherms. Distribution coeflicients for NH4' sorption per unit weight of soil were in the range of 0.02 to 0.77. NH4+ sorption coemcients were usually highest in the forest floor of a given soil.NH4' sorption behaviour of mineral soil horizons was correlated to soil parameters that are determi… Show more
“…displacement of base cations on soil surfaces has been observed across 14 European forests with varying climates (Matschonat and Matzner 1996). Another mechanism for potential cation mobilization with N addition is the acidification effect described above, particularly with the high background nitrification rates at these sites, where nitrification accounts for the fate of [50 % of NH 4 ?…”
“…displacement of base cations on soil surfaces has been observed across 14 European forests with varying climates (Matschonat and Matzner 1996). Another mechanism for potential cation mobilization with N addition is the acidification effect described above, particularly with the high background nitrification rates at these sites, where nitrification accounts for the fate of [50 % of NH 4 ?…”
“…Upper soil horizons at these sites exhibited an approximate pH of 3. Beech litter and Ah horizon soil (the deeper organic layer in which fine organic matter dominates) were collected at the Schneeberg-Schacht site which is populated primarily by beech (Fagus sylvatica) (Matschonat & Matzner, 1996). At the Waldstein site, peatbog soil was collected from a bog area with peat accumulation and Oh horizon soil (the mineral layer which contains up to 15 % humus) was collected from the Waldstein\Coulissenhieb site which is populated primarily by Norway spruce (Picea abies).…”
Section: Methodsmentioning
confidence: 99%
“…At the Waldstein site, peatbog soil was collected from a bog area with peat accumulation and Oh horizon soil (the mineral layer which contains up to 15 % humus) was collected from the Waldstein\Coulissenhieb site which is populated primarily by Norway spruce (Picea abies). These sites have been described previously by Matschonat & Matzner (1996). Characteristics of the peat-bog soil were : soil dry weight, 15 % ; organic carbon, 471 g kg -" ; carbon to nitrogen ratio, 17n8.…”
Two anaerobic acid-tolerant bacteria, CK58T and CK74 T , were isolated from acidic beech litter and acidic peat-bog soil, respectively. Both bacteria were spore-forming, motile rods with peritrichous flagella.
“…This can be explained by the preference of ammonium to nitrate by soil microorganisms, followed by higher microbial immobilization of ammonium and also adsorption of ammonium through pure physicochemical reactions onto exchange sites of organic matter, while nitrate due to a lower retention capacity relative to ammonium is lost mainly into leachate (e.g. Matschonat and Matzner 1996;Aber et al 1998). This could be seen after two growing seasons of 15 N tracer application that more 15 N-nitrate than 15 N-NH 4 + were incorporated into leachate (Table 6).…”
Section: Microbial Immobilization Of Nitrogen Affected By N Inputmentioning
Abstract:The partitioning of nitrogen deposition among forest soil (including forest floor), leachate and above-and belowground biomass of pot cultured beech seedlings in comparison to non-cultured treatments were investigated by adding although statistically it was not significantly different. In total the immobilization of ammonium in the plant-soil system was about 60%higher than nitrate, indicating the importance of the N-forms deposition for retention in forest ecosystems.
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