OXIDABLE FRACTIONS OF ORGANIC MATTER IN FIELDS OF FIRE IN THE CHAPADA MICROREGIÃO OF THE VEHICLES

Abstract

ONE OF THE BEST INDICATORS OF SOIL QUALITY IS ORGANIC MATTER, WHICH CONTAINS 58% OF ORGANIC CARBON. THE OBJECTIVE OF THIS WORK WAS TO DETERMINE THE OXIDIZABLE FRACTIONS OF CARBON, IN SOILS OF THE NATIONAL PARK CHAPADA OF THE VEADEIROS. THE AREAS WERE DIVIDED BETWEEN BURNED AND UNBURNED SOILS IN THREE PHYTOPHYSIOGNOMIES: CAMPO LIMPO, CAMPO SUJO, AND STRICTO SENSO. WHEN THE PHYTOPHYSIOGNOMIES WERE COMPARED, THE CLEANED FIELD AND THE DIRTY FIELD PRESENTED A GREATER INCREASE OF THE TOC OVER TIME, WITH HIGHER INDICES IN BURNED SOILS, DIFFERENTIATED FROM THE STRICTO SENSO WHERE IT OCCURRED IN THE OPPOSITE WAY. IN THE FRACTIONS F1 + F2, CLEAN FIELD AND DIRTY FIELD OBTAINED A SIGNIFICANT INCREASE IN BURNED SOILS, IN STRICTO SENSO THERE WAS A LARGER DROP IN VALUES WITH THE SOIL WITHOUT BURNING WITH GREATER AMOUNT OF CARBON. IN THE F3 + F4 FRACTIONS IN THE CLEAN FIELD AND DIRTY FIELD, THE HIGHEST VALUES WERE FOUND FOR THE SOILS WITHOUT BURNING, IN STRICTO SENSO OBTAINED HIGHER VALUES IN BURNT SOIL.