A degradação das propriedades físicas dos latossolos vermelhos distróficos em decorrência dos diferentes usos agrícolas em Floraí-Pr

Abstract

In the last decades the processes that degrade the pedological layer have been intensified from the development and application of agriculture techniques most of them inadequate. The lack of conservation and the destruction of the vegetal cover that protects the soil, as well as the application of high concentrations of chemical products favor the greater degradation of its physical properties. In the city of Floraí (PR) these process area also present and are favored by the different agriculture practices together with the existing soil types, deriving from the Formação Serra Geral basalt alteration and the sandstone of Formação Caiuá, which present differentiated texture characteristics and require special care. The present work aims to evaluate the degradation of the red dystrophic latosoil physical properties, proceeding from the sandstone when submitted to different uses as soy, coffee, orange and pasture, comparing it with the same latosoil in one native vegetation area which presents morphological characteristics considered ideal. To reach this objective it was appealed to the Cultural Profile method (Hénin, 1976) and to laboratory analysis. It was evidenced that the orange culture is the agriculturist practice that most degrades the pedological layer, followed by the culture of soy, coffee and pasture respectively.