Title:	Micromorphology and genesis of soils from topolitosequences in the brazilian central plateau.
Authors:	ROLIM NETO, F. C. SCHAEFER, C. E. G. R. CAMÊLO, D. de L. CORRÊA, M. M. PARAHYBA, R. da B. V. CALDAS, A. M. IBRAIMO, A. S. M.
Affiliation:	FERNANDO CARTAXO ROLIM NETO, UFRPE; CARLOS ERNESTO GONÇALVES REYNAUD SCHAEFER, UFV; DANILO DE LIMA CAMÊLO, UFES; MARCELO METRI CORRÊA, UFRPE; ROBERTO DA BOA VIAGEM PARAHYBA, CNPS; ANILDO MONTEIRO CALDAS, UFRPE; ANIFO SOARES MAMUDO IBRAIMO, UFV.
Date Issued:	2019
Citation:	Revista Brasileira de Ciência do Solo, v. 43, e0180219, 2019.
Description:	The micromorphology of deeply weathered soils (Ferralsols/Latossolos) from the Central Plateau of Brazil remains little studied, and its affiliation to different parent materials, poorly known. To clarify the processes of soil formation of these acric, gibbsitic, Fe-oxide rich Ferralsols, three lithotoposequences on local ultrabasic to basic intrusive rocks were studied. The influences of mixing and pedobioturbation are evident in all soils, and Ferralsols of the Central Plateau of Brazil are polygenetic, based on the coarse mineral composition, with ultrabasic and metapelitic rock contributions. The typical oxic microstructure with stable microaggregates encompasses a gibbsite/Fe rich micromass with random inclusions of charcoal, allochthonous quartz, Ti-magnetite, and perovskite grains. Shallow Cambisols (Cambissolos) on tuffites also display a similar 'oxic' microstructure, but a much lower degree of weathering. These Cambisols possesses apatite, and mafic and pelitic minerals as residuals minerals grains, indicating the polygenetic colluvia mixture of different substrates. The common occurrence of perovskite (CaTiO3) as a residual grain in deep-weathered, acric Ferralsols on ultrabasic rocks, not yet reported in the literature, shows an unusual resistant Ca reserve in oxic soils, though nothing is known about its implications to soil fertility.
Thesagro:	Solo Tropical Ferralsolo Cambissolo Rocha
DOI:	http://dx.doi.org/10.1590/18069657rbcs20180219
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPS)