Bayreuther Institut für Terrestrische Ökosystemforschung
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Micro lysimetry as a tool for studying soil solution chemistry in the vicinity of growing roots


From 01/1995 to 12/1997

Principal Investigator: Egbert Matzner
Staff: Antje Dieffenbach, Axel Göttlein
Grant: 0339476 B Vorhersage und Erklärung des Verhaltens und der Belastbarkeit von Ökosystemen unter veränderten Umweltbedingungen

The aim of our project was to investigate microscale variabilities of soil solution chemistry which are caused by soil structure, soil horizons and the activity of growing roots. We used micro suction cups as sampling device and capillary electrophoresis for ion analysis.
Within a soil profile gradients of soil solution chemistry an of as soil solid phase characteristics could be observed on very short distances (<2 cm). Steep concentration gradients at visible soil horizon borders could not be observed. At this scale it was also not possible to identify regulation mechanisms between soil solid phase and soil solution chemistry. We observed distinct differences in solution concentrations of Altot and Al3+ which caused differences up to one order of magnitude when calculating Ca/Al ratios. Changes of rhizosphere soil solution caused by growing roots of Norway spruce could be observed in high resolution in the field as well as in rhizotrone experiments. A general result was the decrease of Mg2+ and Al3+ near the root. In the field, rhizosphere effects were superimposed by heterogeneities of the soil solid phase and seepage dynamics.
Micro suction cups and capillary electrophoresis proved to be a powerful tool for investigating spatial and temporal variations of soil solution chemistry, with the essential advantage that Al3+ can be determined (Al-toxicity). Due to the distinct microscale variability of nutrient supply and concentration gradients in the rhizosphere a "conventional" site characterization (standard suction cups, bulk soil analysis) can only give a rough estimation of the actual nutrient availability. (final report 1998)

List of publications of this Project

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
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; Manderscheid, B: Spatial heterogeneity and temporal dynamics of soil water tension in a mature Norway spruce stand, Hydrological Processes, 12, 417-428 (1998) -- Details
Göttlein, A: Determination of free Al3+ in soil solutions by capillary electrophoresis, European Journal of Soil Science, 49, 107-112 (1998) -- Details
Lischeid, G; Alewell, C; Bittersohl, J; Göttlein, A; Jungnickel, C; Lange, H; Manderscheid, B; Moritz, K; Ostendorf, B; Sager, H: Investigating soil and groundwater quality at different scales in a forested catchment: the Waldstein case study , Nutrient Cycling in Agroecosystems, 50, 109-118 (1998) -- Details
Dieffenbach, A; Göttlein, A; Matzner, E: In-situ soil solution chemistry in an acid forest soil as influenced by growing roots of Norway spruce (Picea abies (L.) Karst.), Plant and Soil, 192, 57-61 (1997) -- Details
Göttlein, A; Matzner, E: Microscale heterogeneity of acidity related stress-parameters in the soil solution of a forested cambic podzol, Plant and Soil, 192, 95-105 (1997) -- Details
Göttlein, A; Blasek, R: Analysis of small volumes of soil solution by capillary electrophoresis, Soil Science, 161 (10), 705-715 (1996) -- Details
Göttlein, A; Hell, U; Blasek, R: A system for microscale tensiometry and lysimetry, Geoderma, 69, 147-156 (1996) -- Details
Göttlein, A; Stanjek, H: Micro-scale variation of solid-phase properties and soil solution chemistry in a forest podzol and its relation to soil horizons, European Journal of Soil Science, 47, 627-636 (1996) -- Details
Göttlein, A: Mikroskalige Variabilität von Bodenlösungskonzentrationen und Saugspannungen in einem sauren Waldboden, Mitteilungen der Deutschen Bodenkundlichen Gesellschaft, 76, 25-28 (1995)
Göttlein, A; Dieffenbach, A: Zeitlich und räumlich hochauflösende Bodenwasserpotentialmessungen (Tensiometrie) im Freilandexperiment und Laborversuch, Borkheider Seminar zur Ökophysiologie des Wurzelraumes, 6, 155-160 (1995)
Göttlein, A: Mikroskalige Variabilität der Bodenlösungschemie - Ergebnisse eines Laborversuchs zum Vergleich von Standard- und Mikro-Saugkerzen, Z. Pflanzenernährung Bodenkunde, 158, 205-206 (1995) -- Details
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