Effect of vegetation and its succession on water repellency in sandy soils

verfasst von
Lubomir Lichner, Vincent J.M.N.L. Felde, Burkhard Büdel, Martin Leue, Horst H. Gerke, Ruth H. Ellerbrock, Jozef Kollár, Marek Rodný, Peter Šurda, Nándor Fodor, Renáta Sándor
Abstract

Vegetation and its succession can change the parameters of soil water repellency (SWR) due to the change in amount and composition of soil organic matter. This hypothesis was tested in natural and agricultural environments in Germany, Hungary, and Slovakia. The parameters investigated were the extent (determined by the repellency indices RI, RI

c, and RI

m) and persistence (determined by the water drop penetration time and water repellency cessation time) of SWR, as well as the potential wettability index of organic matter in sandy soils. The SWR parameters and soil organic carbon (SOC) content increased in the course of primary succession at Mehlinger Heide, Germany, and Sekule, Slovakia. Dye tracer experiments undertaken at Sekule revealed contrasting flow patterns: (a) preferential flow in water-repellent soil under biological soil crust and grass and (b) piston flow in wettable soil that consists almost of pure quartz sand. The effective flow cross section decreased, and the degree of preferential flow increased in the course of primary succession at Sekule. No consistent trend of the SWR parameters and SOC was observed in the course of secondary succession at Csólyospálos, Hungary. This is the first time that differences between trends in SWR parameters due to primary and secondary successions were observed and related to the composition of SOC and extracellular polymeric substances. It can be concluded that dynamics of soil organic matter composition during the succession controls SWR.

Externe Organisation(en)
Universität Kassel
Slovak Academy of Sciences
Technische Universität Kaiserslautern
Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.
Hungarian Academy of Sciences
Typ
Artikel
Journal
ECOHYDROLOGY
Band
11
ISSN
1936-0584
Publikationsdatum
24.09.2018
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Erdoberflächenprozesse, Ökologie, Evolution, Verhaltenswissenschaften und Systematik, Aquatische Wissenschaften, Ökologie
Elektronische Version(en)
https://doi.org/10.1002/eco.1991 (Zugang: Geschlossen)