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The effects of the activity of fine roots of beech (Fagus sylvatica L.) on soil solution and solid phase
BITÖK-A10From 01/1998 to 12/2000
Principal Investigator: Egbert Matzner
Staff: Martin Braun, Antje Dieffenbach
Grant: 0339476 C Grundlagen zur nachhaltigen Entwicklung von Ökosystemen bei veränderter Umwelt
The aim of the project is to investigate changes in soil solution chemistry induced by growing fine roots of beech trees under field conditions. Soil solution was sampled in high temporal and spatial resolution in the vicinity of a growing root.
Surprisingly an increase of the K+ concentrations was found close to the roots (< 2,5 mm distance) while concentrations of NO3- and Ca2+ decreased.
The observed gradients of Ca2+, K+ and NO3- in the rhizosphere were variable in time and strength. This might be caused by several propocesses, including the uptake of ions, the leaching from roots and konvective transport in the soil profile. Further investigations on the role of these processes are planned for 1999.
Laboratory experiments to investigate the role of Al on ion and water uptake of beech roots were conducted using a quarz-hydroculture setup. We were not able to fix the pH of the solution which increased during the experiment and thus the experiments had to be terminated.
List of publications of this Project
|Braun, M; Dieffenbach, A; Matzner, E: Soil solution chemistry in the rhizosphere of beech (Fagus silvatica L.) roots as influenced by ammonium supply, Journal of Plant Nutr. Soil Sci., 164, 271-277 (2001)|
|Lindenmair, J; Matzner, E; Göttlein, A: Eine Wurzelkammer zur Quantifizierung der potenziellen Nährstoff- und Wasseraufnahme von Grobwurzeln an Bäumen im Freiland, Physiologie und Funktion von Pflanzenwurzeln. 11. Borkheider Seminar zur Ökophysiologie des Wurzelraumes, 124-130 (2001)|
|Dieffenbach, A: In situ Bodenlösungschemie in der Rhizosphäre von Fichten-Feinwurzeln in Bayreuther Institut für Terrestrische Ökosystemforschung (BITÖK): Bayreuther Forum Ökologie, Selbstverlag, 76, 1-122 (2000) -- Details|
|Dieffenbach, A; Matzner, E: In situ soil solution chemistry in the rhizosphere of mature Norway spruce (Picea abies L. Karst.) trees, Plant and Soil, 222(1), 149-161 (2000) -- Details|
|Bakker, MR; Dieffenbach, A; Ranger, J: Soil solution chemistry in the rhizosphere of roots of sessile oak (Quercus petraea) as influenced by lime, Plant and Soil, 209, 209-216 (1999) -- Details|
|Göttlein, A; Heim, A; Matzner, E: Mobilization of aluminium in the rhizosphere soil solution of growing tree roots in an acidic soil, Plant and Soil, 211, 41-49 (1999) -- Details|