MACRO AND MICROMORPHOLOGIC INDEX OF PHYSICAL RED LATOSOL QUALITY OF MEDIUM TEXTURE CULTIVATED WITH SUGAR CANE IN QUIRINÓPOLIS MICRO REGION, GOIÁS

Abstract

Quirinópolis Micro region depicts great expansion of sugar cane production on the clayed Red Latossols but due to the increasing demand of new areas the naturally less fertile, the dystrophic Red Latosol of medium texture was done. Such soils are considered weak to the extent of structural stability and impact installation such erosion and compression, this one primarily due to highly high technified management, as though the sugar cane, which heavy machinery during all stages of culture. The aim of this study was to evaluate the physical quality of LVd with current use of sugar cane, however previously varied successions (soybeans, pasture and grazing succession/soybean), with reference to soil profiles of areas with remaniant vegetation. Thus, we obtained macro and micromorphologic indicators, physical and penetration resistance. The results revealed changes in micro and macrostructure, consistency, clay dispersion, soil bulk density and penetration resistance on cultivated soil profiles compares with natural cover profile, indicators compatible of degradation by compaction, however moderate.

Key words: Saccharum spp, structure, degradation, compaction.