Granens markpåverkan : en studie av markkemi, jordmånsbildning och lermineralogi i gran- och lövskogsbestånd i södra Småland

Sammanfattning: Chemical and mineralogical studies of forest soils were made in four Norway Spruce (Picea abies (L.) Karst) and broadleaf stands in Asa in southern Sweden. The aim of the study was to investigate the differences in soil forming processes between stands of coniferous (spruce) and broad-leaved trees. The investigation did not show any differences in soil acidity, which was measured by pHH2O, pHKCl, exchangeable and titratable acidity. The cation exchange capacity in the soil of the two stand types was similar but there was an indication for difference in base saturation. A number of soil properties showed a higher degree of podzolisation in the spruce forest. The mineralogical study was made on the clay fraction of the soil. Total dissolution or transformation of chlorite and presence of smectite in the spruce forest indicate that the weathering rate is higher in the spruce forest.