Pedogenesis and weathering in tundra and podzolic soils in north-east European Russia.

摘要

Soil minerals susceptible to weathering and some individual components and fractions constituting mineral pedomass - oxides, fine (<0.08 鎚) and coarse (0.08-0.2 鎚) colloids, semi-colloids (0.2-1 鎚), and coarser fractions - were studied using quartz as a marker to estimate soil balance indices. It was shown that in the tundra and taiga zones of European Russia, pedogenesis and weathering result in the transformation and redistribution of mineral components down the profile of automorphic soils developed on coverloam. Model experiments on weathering of different minerals under natural conditions confirm that the processes of dissolution, mass-transport, and disintegration of phyllosilicates take place in the soil.