Utilização do método Tea Bag Index na biodegradação em solos submetidos a diferentes tipos de uso em Campo Mourão, Paraná

Abstract

The increasing demand for raw materials and unplanned soil use have led to radical changes in natural vegetation cover in the most diverse phytogeographic units, altering performance or balance. The present work aimed to monitor the biodegradation of organic materials by applying the Tea Bag Index method in soils with different types of use and to evaluate their use as a soil quality bioindicator. The study was conducted in three areas using different soil. The chosen areas were native forest, uncovered soil area and monoculture plant area, all located in Campo Mourão - PR. Green and red tea bags, which have different degradation characteristics, were planted at 15, 30 and 60 days. Soil collection was also performed for microbiological analysis to determine the colony forming units of total aerobic bacteria, cellulase producing bacteria and total fungi present in the environments in question. Because green tea biomass loss media were superior to red tea in almost all periods and areas of analysis. In the planting area the types of tea did not differ. There was greater degradation in the Conservation Unit, and less in UTFPR. As well as the Conservation Unit area presented the largest CFUs and the UTFPR area the smallest.