Atributos químicos e textura do solo em veredas conservadas e antropizadas no bioma Cerrado
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2009-07-15
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Universidade Federal de Goiás
Resumo
The objective of this work was to study the soil of wetlands situated in
conserved and altered environments (in agricultural and cattle areas), by determining the
chemical attributes and texture of the soil. The study was carried through in the central
region of Cerrado biome, in the state of Goiás, in wetlands situated in the City of Bela
Vista de Goiás. There have been selected three wetlands for soil sampling: one
conserved wetland, surrounded by natural vegetation (cerrado); one altered area, with
occurrence of pasture in its adjacent areas; and another wetland, also altered, with the
occurrence of agriculture in its adjacent areas. The samplings were taken in the months
of April and May of 2008, through the use of lines of reference, according to their
positions in the relief, in upper, average and lower position, following approximately
the direction of the line of draining of the wetland. It has been collected samples in three
depths: 0-10 cm; 10-20 cm and 20-40 cm. The variables studied have been: texture, pH
in CaCl2 0.01 M; micronutrients (Cu, Fe, Mn, Zn and B), macronutrients (P, K, Ca, Mg
and S), concentration of Al and potential acidity (H+Al), and soil organic matter content
(SOM). It was verified that the clay percentages in the lower region of the relief are
higher in altered environments and the percentage of silt are higher in the wetland
adjacent to the agricultural area. In lower position of the relief, the concentrations of
SOM are lesser in wetlands adjacent to the agricultural areas and pastures. In the
conserved wetland the base saturation is higher in lower position of relief and, in this
same position, the acidity (pH) and the aluminum concentration is lesser than that in the
average and upper positions, occurring the inverse in farming landscapes.
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SOUSA, Ricardo Fernandes de. Chemical attributes and texture of the soil in conserved and altered wetlands (veredas) in Cerrado biome. 2009. 72 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade Federal de Goiás, Goiânia, 2009.