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Sistema de porosidade do solo numa topossequĂȘncia Luviossolo-Solonetz no Sul de Portugal
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Orientador(es)
Resumo(s)
Soils with stagnic properties occurring in
Alentejo commonly have low porosity.
The study of a typical soil toposequence,
showed that soil pore features were significantly
different amongst summit and
foot/toe slope pedons. In the summit pedon
the Ap1 horizon was more porous than the
Ap2, both exhibiting similar void distribution
patterns. Conversely, the Ap1 and Ap2
horizons of the footslope pedon had a similar
pore space volume, but pores with diameter
larger than 500 ÎŒm were less important
in the later. Pore space volume of Bt
horizons was low whatever the slope position
of pedons. However, they differ significantly
in terms of void type and orientation
patterns. No preferred orientation patterns
were found in soil voids that could be
related with soil compaction, being their
low porosity, namely their low âconductiveâ porosity, not attributable to soil compaction.
Those features can instead be due
to the sodicity and/or the low organic C of
these soils.
Descrição
Palavras-chave
pore space characteristics Luvisol-Solonetz toposequence sistema de porosidade do solo topossequĂȘncia Luvissolo-Solonetz Portugal
Contexto Educativo
Citação
"Revista de CiĂȘncias AgrĂĄrias". ISSN 0871-018X. 30:2 (2007) 15-26
Editora
Sociedade de CiĂȘncias AgrĂĄrias de Portugal