Soil trends in the Atlantic Forest remnant at the Argentinian – Brazil Iguazú National Park buffer zone

FASANO, MARÍA CECILIA; CASTRILLO, MARIA LORENA; ROHATCH, PABLO; ONETTO, ANDREA LILIANA; AMERIO, NATALIA SOLEDAD; BARENGO, MARCELA; CORTESE, ILIANA JULIETA; PEDROZO, TANIA TAMARA; SADAÑOSKI, MARCELA ALEJANDRA; VELÁZQUEZ, JUAN; BICH GUSTAVO ÁNGEL; ZAPATA, PEDRO DARIO

Hohenau, Itapúa, Paraguay

Congreso; VIII Congreso Sudamericano de Yerba Mate; 2023

Centro Yerbatero Paraguayo

The remaining forest that constitutes the Iguazú National Park -INP- is a naturalUNESCO - United Nations Educational, Scientific and Cultural Organization - Atlantic Forestfragments shared by Argentina and Brazil Republics. The agronomic management in the Parklimits based on physicochemical analysis, compromising its natural balance and function as abuffer zone for this forest fragment. The aluminum content may compromise the natural fertilityand this phenomenon may be associated with chemical characteristics of the characteristicregional soils. The present research aimed to determine the aluminum content as the mainacidification factor on oxisols, quantifying its amount by two techniques, starting in this waythe mapping and analyzing of this soil in the three different agronomic management samplingpoints with yerba mate plantation in the INP buffer zone. The soil samples showed a low pH,with no detectable concentrations of Al3+ up to 0.15 m depth. This result signifies that thechemical barrier effects that harm the growth of plant roots in this case, are not transcendentalfor yerba mate crops or natural vegetation. The soil was classified as clayey in texture, verypermeable to vertical and lateral movement of water, in addition to greater water retention inthe subsurface with natural coverage. To expand the information and create a database for futurestudies, it is proposed to monitor the sampled parcels in further chemical and physical trends,to understand the dynamics of nutrients in this Atlantic Forest remanent and the micro soilbiodiversity that sustain this dynamic.