Comparative Dynamics of Nutrient Release through Litter Decomposition in Eucalyptus grandis Hill ex Maiden and Pinus taeda L. Stands

The installation of commercial stands with exotic forest species on low fertility soils originally covered by native pastures is an unusual situation worldwide. In recent years, the area occupied systems designed for pulp or wood production immediate replanting has increased strongly in Pampean region South America. this context, study nutrient recycling from litter decomposition acquires particular relevance. This work seeks to evaluate and compare release produced 14-year-old Eucalyptus grandis Hill ex Maiden Pinus taeda L. test applicability a new sampling methodology assessment. For two evaluation N, P, K, Ca, Mg, Fe, Mn, Cu Zn dynamics during was carried out. general, K concentration decreased through decomposition, meanwhile, all other nutrients showed some degree immobilization, but counteracted biomass loss most them. mainly resulted net litter. A higher rate P. compared E. grandis, exception verified. Fe immobilization observed both showing taeda. Finally, exhibited processes releases might suggest temporal quantitative availability taeda, due their faster return soil. These findings could be relevant development models sustainable management, adapting demand supply rotations.