Comparison of Microbial Dynamics in Two Rhine Valley Soils under Organic Management

R. EngelsDepartment of Agricultural and Food Microbiology, University of Bonn, Meckenheimer Allee 168, D-5300Bonn 1, Germany

C. HackenbergDepartment of Agricultural and Food Microbiology, University of Bonn, Meckenheimer Allee 168, D-5300Bonn 1, Germany

U. StumpfDepartment of Agricultural and Food Microbiology, University of Bonn, Meckenheimer Allee 168, D-5300Bonn 1, Germany

P. MarkusDepartment of Agricultural and Food Microbiology, University of Bonn, Meckenheimer Allee 168, D-5300Bonn 1, Germany

J. KrämerDepartment of Agricultural and Food Microbiology, University of Bonn, Meckenheimer Allee 168, D-5300Bonn 1, Germany

ABSTRACT

Two soils of an experimental station in the Rhine valley near Bonn, cultivated according to IFOAM guidelines, were analyzed for several soil microbiological parameters during a period of 3 years. Analyses included biomass, dehydrogenase, catalase and the four exo-enzymes protease, alkaline phosphatase, sucrase, and β-glucosidase. Microbial biomass proved to be a useful parameter to observe status and developments of sustainable soil productivity, as well as dehydrogenase and catalase. Exo-enzymes were not well correlated to biomass but they were useful in monitoring specific nutrient cycles.

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Comparison of Microbial Dynamics in Two Rhine Valley Soils under Organic Management

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