VARIATION OF DEHIDROGENASE ENZYME AKTIVITY AND DIFFERENT PEDOGENETIC DEVELOPMENT ON WEATHERED BASALTIC TOPOSEQUENCES

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Aylin Erkoçak
Orhan Dengiz

Abstract

Enzymes play the most important role in the decomposition and deterioration of organic matter in
the soil. Most of the microbial activity in the soil is determined by measuring the activities of the
enzymes. The aim of this study is to examine the changes in dehydrogenase enzyme activity in
different pedological development soils formed on the same parent material, but with different
slopes, land cover and land use under semihumid climatic conditions. It was carried out on the soil
formed on the basaltic parent material in different topographical positions within the Dağköy area of
Engiz district, which is located at the south of the Samsun-Bafra Highway. In this study,
dehydrogenase enzyme activity was assessed in order to reveal the biological properties of the soil
of the study area and it was investigated the dehydrogenase enzyme activity in terms of soil
biological property. For this aim, six soil profiles formed on weathered basaltic parent material and
located on toposequence of north-south transect were described according to genetic horizon and
classified as Lithic Ustorthent, Vertic Haplustept, Typic Haplustept and Typic Haplustert. I

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