Your browser doesn't support javascript.
loading
Mineralogical, chemical and electrochemical attributes of soils
Almeida, Cecília Calhau; Fontes, Maurício Paulo Ferreira; Dias, Adriana Cristina; Pereira, Thiago Torres Costa; Ker, João Carlos.
Afiliação
  • Almeida, Cecília Calhau; Universidade Federal de Viçosa. Depto. de Solos. Viçosa. BR
  • Fontes, Maurício Paulo Ferreira; Universidade Federal de Viçosa. Depto. de Solos. Viçosa. BR
  • Dias, Adriana Cristina; Universidade Federal de Viçosa. Depto. de Solos. Viçosa. BR
  • Pereira, Thiago Torres Costa; Universidade do Estado de Minas Gerais. Belo Horizonte. BR
  • Ker, João Carlos; Universidade Federal de Viçosa. Depto. de Solos. Viçosa. BR
Sci. agric ; 78(6): 1-11, 2021. map, tab
Article em En | VETINDEX | ID: biblio-1497991
Biblioteca responsável: BR68.1
ABSTRACT
A set of attributes endows the soils with distinctive characteristics and astute understanding is required in order to formulate suitable strategies for soil management. The aim of this study was to physically, chemically and mineralogically characterize samples of the main soil classes in Minas Gerais, Brazil, determine the point of zero salt effect (PZSE) and the point of zero charge (PZC), and ascertain the correlation between these factors and soil attributes. The soils evaluated presented different textural classes ranging from loamy sand (Entisol) to very clayey (some Oxisols and Ultisols). The soils differed substantially in terms of fertility, presenting a range from dystrophic (low fertility, base saturation = 50 %), even within the same soil class, such as the Oxisols, which suggests the concurrence of the parent material. Highly weathered soils are predominant in Minas Gerais and these soils are composed predominantly of kaolinite, gibbsite, goethite and hematite. Traces of hydroxy-Al interlayered vermiculite and illite were also found in the Oxisols, Ultisols and Inceptisols. A correlation between the PZSE and the PZC in the A horizon was observed. A high degree of correlation was observed between the PZC and the exchangeable aluminum and the ratio of iron obtained by ammonium oxalate and dithionite-citrate (Feo/Fed) in both the A and B horizons of soil classes. The results obtained reinforce the importance of knowledge of soil attributes to the adoption of practices such as the management of phosphate fertilization in clayey soils and liming in soils rich in aluminum.
Assuntos
Palavras-chave

Texto completo: 1 Base de dados: VETINDEX Assunto principal: Solo / Solos Argilosos / Minerais Idioma: En Revista: Sci. agric Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: VETINDEX Assunto principal: Solo / Solos Argilosos / Minerais Idioma: En Revista: Sci. agric Ano de publicação: 2021 Tipo de documento: Article