ZLV Online

Abstrakt

The afforestation of marginal agricultural lands represents often type of the changes in land use. These changes initiate subsequent shifts in the ecosystem dynamics and the necessity of quantification of these changes is relevant consequently. The presentation documents the results of the research on accumulation of the surface humus and results of the soil chemistry in soils of forest localities compared to afforested agricultural lands 60 years ago. The research was conducted in the vicinity of the Šachotín village, Czech-Moravian Highland. The forest soil state is compared with the arable soil on the same site. In the stably forested part the effect of group birch admixture was studied, too. The highest surface humus amount was documented in the old Norway spruce stand (62.8 t/ha), the lower was in parts with admixture of birch (52.0 t/ha) and the lowest on the afforested agricltural soil (45.9 t/ha). The arable soil showed very unfavourable soil chemistry, neither the forested soils of all stages nor the birch admixture show any clear differences in the soil state. despite this, intense shifts in the soil characteristics and dynamics can be supposed after afforestation, as well as the considerable effects of the new biomass accumulation. The effects of birch in the older spruce stands can be considered as favourable.