PEDOGENESIS Y CARTOGRAFÍA DE SUELOS DE LA RSP COMO HERRAMIENTAS PARA ENTENDER LOS CAMBIOS EN LA VEGETACIÓN Y PLANIFICAR SU USO SUSTENTABLE

PABLO BOUZA; CESAR M. ROSTAGNO

Tucumán

Congreso; XX Congreso Geológico Argentino Simposio PEDOGENESIS Y CARTOGRAFÍA DE SUELOS COMO HERRAMIENTAS PARA LA PLANIFICACIÓN SUSTENTABLE.; 2017

Asociación Geológica Argentina

The elaboration of range management and monitoring plans requires a cartographic base and knowledge of the pedogenetic factors and processes to evaluate changes in vegetation and soils and to monitor trends associated with livestock use. In the RSPV, the main changes in soils and vegetation related to sheep grazing are associated with erosion processes, both water and wind. Soil erosion has favored the transition of shrub herbaceous steppes and Haplocalcides and Calciargides soils, with medium depth A horizons to shrub dominated steppes and degraded soils with Av horizons, with low infiltration rates. On the other hand, the regional accumulation of wind sediments from the dune fronts that originate in the SO coast of PV has generated the thickening of A horizons and favored the formation of Haplargides arénicos. This change in soils has favored the change of shrub dominated steppes to steppes dominated by perennial grasses. From the point of view of livestock production, this change, not directly associated with livestock use, has increased the production of forage biomass. In this presentation, these and other results are presented and the erosion / accumulation processes are discussed in the framework of the soil evolution model, which includes progressive and regressive processes and changes in vegetation through the state and transition model.