Atributos físicos do solo sob diferentes usos da terra do Cerrado de Minas Gerais

Abstract

The objective of this study was to evaluate the physical attributes of the soil after the conversion of degraded pasture into integrated crop-livestock-forest systems (ICLF) and forage crops in Curvelo, Minas Gerais.Soil samples were collected from depths of 0-5, 5-10, 10-20, 20-30 cm. Theevaluated attributes were soil density (SD)and particlesdensity (PD), total porosity (TP), geometric mean diameter (GMD)and weighted meandiameter (WMD) and aggregate stability index (ASI) in seven treatments:ICLF withcultivation eucalyptus intercropped with corn and marandu grass (ICLF M), corn and java(ICLF J)and corn, marandu grass and java (ICLF J+M); monoculture of marandu grass (MAR) and java (JAVA); maranduconsortium with java (J+M)anddegraded pasture (PAST).The results were submitted to analysis of variance andstatistical significance of differences between treatment means were assessed by Tukey test (p <0.05).The lowest SDvalueswere observed in JAVA (0-5 cm) and the highest TP valuesin JAVA (0-5 cm). The highest GMDand WMD(10-20 cm) were found in PAST. For PD and ASIno significant differences were found between treatments and depths.