Infiltração da água no solo no sistema pedológico Campus do Arenito, cidade gaúcha, noroeste do estado do Paraná
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Data
2008
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Resumo
Considering the importance of understanding the water status of pedological covers
for studies of prevention and containment of erosive processes, this study was conducted on
a slope with a pedological system composed of Red Latossol (Oxisol)/Red Argisol (Ultisol)
derived from Caiuá sandstone, on an experimental farm of the Universidade Estadual de
Maringá, Cidade Gaúcha, in Northwestern Paraná State. After a detailed morphologic
description of the pedologic system, infiltration experiments were carried out in the main
diagnostic horizons and the respective transitions of six soil profiles along the slope. The
pattern of water dynamics in the latosolic cover is different in the surface and subsurface.
Over the course of time, the surface horizons AP, AB and/or BA have alternating humidity
conditions, sometimes more humid and sometimes drier, according to the rain distribution
and intensity. In deeper layers of the Bw horizon the water conditions depend on the
vertical and lateral water movement, and are therefore not directly related to the
atmospheric variations, as occur on the surface. In the podzolic cover a vertical drainage
blockage was observed in the top of Bt horizon, generating above it (horizon AE) a more
constantly humid zone. In general, unlike in the Latosols, humidity and dryness do not
alternate in the surface horizons of the Argisol. As a result the Argisols are constantly
more humid than Latosols due to lateral water flow from upslope.
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Palavras-chave
Fluxos hídricos, Argissolo, Latossolo, Water flows, Latosol, Podzolic soil
Citação
CUNHA, José Edézio; NÓBREGA, Maria Teresa de; CASTRO, Selma Simões de. Infiltração da água no solo no sistema pedológico Campus do Arenito, cidade gaúcha, noroeste do estado do Paraná. Revista Brasileira de Ciência do Solo, Viçosa, v. 32, p. 13-33, 2008.