ANTHROPOGENIC EFFECT ON SOIL ORGANIC PHOSPHORUS FRACTIONS IN TROPICAL ECOSYSTEMS

• DOI: 10.1081/css-100104217
• Publication Date: 2002-07-26T16:38:33Z
• Authors: Lidia Giuffré; Gabriel Piccolo; Ramón Rosell; Carla Pascale; Olga S. Heredia; Esteban Ciarlo
• Keywords: 0401 agriculture, forestry, and fisheries; 04 agricultural and veterinary sciences; 15. Life on land

Total organic phosphorus (P), labile organic P, and total carbon were determined in composite surface soil samples, with three replicates, in a Kandihumult from Misiones province, Argentina. The analysis was performed on 8 mm aggregate fractions obtained by dry sieving. Representative situations were selected to evaluate changes in P dynamics by soil use: a native subtropical forest, a degraded agroecosystem with a 50-year yerba mate plantation (Ilex paraguariensis Saint Hill.), and a similar plantation with a 6-year associated elephant grass (Pennisetum purpureum Schumach). Native pristine soil from the forest presented the highest content of phosphorus in more humified fractions ( 8 mm), ...