Characterization and classification of two soils derived from basic rocks in Pernambuco State Coast, Northeast Brazil

Scientia Agricola

Lindomário Barros De Oliveira¹  Maria Da Graça De Vasconcelos Xavier Ferreira¹  Flávio Adriano Marques² 

[1] ,UFRPE Depto. de Agronomia Recife PE ,Brasil

关键词: Red Nitisol;    Red-Yellow Latosol;    Cabo de Santo Agostinho;    tropical soils;    Nitossolo Vermelho;    Latossolo Vermelho-Amarelo;    Cabo de Santo Agostinho;    solos tropicais;   

DOI  :  10.1590/S0103-90162004000600009

来源: SciELO

【 摘 要 】

Geomorphic surfaces that present soils derived from basic rocks under warm and humid climate are unique scenarios for studying tropical soils. This paper aimed to characterize and classify two pedons derived from basalt at the Atlantic Forest Zone, Pernambuco State, Northeastern coast of Brazil. Two representative pedons (P1 and P2) were selected on a hillslope at the Cabo de Santo Agostinho municipality. Field macromorphological descriptions were carried out and soil horizon were sampled for physical, chemical, mineralogical and micromorphological characterization. The soils were classified, according to the Brazilian System of Soil Classification (and US Soil Taxonomy) as: "Latossolo Vermelho-Amarelo distroférrico argissólico" (Typic Hapludox) (P1) and "Nitossolo Vermelho distroférrico típico" (Rhodic Paleudult) (P2). Pedon 1 differs from Pedon 2 in some aspects. For instance, P1 presents more yellowish colors, absence of clay illuviation, more friable consistence and the prismatic structure undergoes transformation to angular and subangular blocks. Pedon 2 presents ferri-argilans and leptocutans which indicate that vertical and lateral illuviation of clay is an active process in their formation. These chemically poor and mineralogically uniform soils are a result of the high temperature and rainfall of the studied area.

【 授权许可】

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