Soil dehydrogenase activity of natural macro aggregates in a toposequence of forest soil

• Main Authors: Maira Kussainova, Murat Durmuş, Aylin Erkoçak, Rıdvan Kızılkaya
• Format: Article
• Language: English
• Published: Federation of Eurasian Soil Science Societies 2013-01-01
• Series: Eurasian Journal of Soil Science
• Subjects: topograpy; soil; aggregate; dehydrogenase activity
• Online Access: http://dergipark.ulakbim.gov.tr/ejss/article/view/5000078260/5000072484

The main objective of this study was to determine changes in soil dehydrogenase activity in natural macro aggregates development along a slope in forest soils. This study was carried out in Kocadag, Samsun, Turkey. Four landscape positions i.e., summit, shoulder backslope and footslope, were selected. For each landseape position, soil macro aggregates were separated into six aggregate size classes using a dry sieving method and then dehydrogenase activity was analyzed. In this research, topography influenced the macroaggregate size and dehydrogenase activity within the aggregates. At all landscape positions, the contents of macro aggregates (especially > 6.3 mm and 2.00–4.75 mm) in all soil samples were higher than other macro aggregate contents. In footslope position, the soils had generally the higher dehydrogenase activity than the other positions at all landscape positions. In all positions, except for shoulder, dehydrogenase activity was greater macro aggregates of <1 mm than in the other macro aggregate size.