Avaliação de bioporos na vitrine tecnológica de agroecologia do Município de Cascavel-PR

Abstract

The use of the soil in different agricultural management has impacts on the chemical, physical and biological properties of the soil. These changes need to be monitored for the purpose of assessing to predict management actions and prevent their degradation. A quality indicator is the evaluation of the biopores in the soil profile. Biopores are channels of various sizes left in the soil by roots of previous crops, green manures and macrofauna of the soil (ecosystem engineers). They play an important role in the infiltration of water, heat and gas exchange with the atmosphere, as well as facilitating the development of the plant root system and access to nutrients and water. The objective of this work is to evaluate the soil biopore density under different management. This evaluation was carried out in the municipality of Cascavel-PR, at Latitude: -24 ° 57'20 "S, Longitude: 53 ° 27'19" W West of Greenwich, at an altitude of 782 m at sea level. Four soil-to-field operations were evaluated. Being: Seeding of grains, Agroforestry System; Área of Olericultura, and Pasture (witness). The size of each plot for the analysis of biopores is 50 x 50 cm (0.25 m²), at a depth of 20 cm. Areas with the same soil type were chosen - Dystrophic Red Latosol. The experimental design was completely randomized design (DIC). All analyzes have 4 replicates (4 treatments x 4 replications) totaling 16 plots. The following variables were analyzed: density of biopores (<2mm and> 2mm), quantity and species (s) of earthworms, and surface plants. The cover plants present in all the managements influence the formation of biopores, but there was no correlation between the density of earthworms and the formation of biopores, since the present species is of the Californian type (Eisenia fetida).