Determinação de manganês disponível em solos de referência da mesorregião oeste do Paraná

Abstract

The study of the soil of natural areas is fundamental to infer the level of contamination of soils exposed to the degradation and interaction among its variables, as well as to assist in environmental monitoring programs. The objective of this study was to determine the concentrations of manganese available in Rhodic Ferralsol and Eutric Gleysol from areas with native vegetation considered as reference, absent from direct anthropogenic contribution, from the Western region of Parana. Four soils were collected in depths from 0 to 20 cm deep, and two soil classes were found: Rhodic Ferralsol and Eutric Gleysol. To quantify the available manganese contents, the acid extraction of soil samples with 0,1 mol L-1 HCl was used. The average manganese content for Eutric Gleysol was 128.7 mg kg-1, and for Rhodic Ferralsol 326.3 mg kg-1. The differences in concentrations between soil classes suggest regionalized studies that consider soil geomorphological aspects.