Physical, chemical, and mineralogical attributes of a representative group of soils from the eastern Amazon region in Brazil
| Autor: | Anderson Martins de Souza Braz, Luís Reynaldo Ferracciú Alleoni, Milton César Costa Campos, Edna Santos de Souza, Antonio Rodrigues Fernandes, Fábio Júnior de Oliveira |
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| Rok vydání: | 2018 |
| Předmět: |
lcsh:GE1-350
Total organic carbon Sodium lcsh:QE1-996.5 Oxide Soil Science chemistry.chemical_element Sulfuric acid 04 agricultural and veterinary sciences Manganese 010501 environmental sciences 01 natural sciences SOLOS lcsh:Geology chemistry.chemical_compound chemistry Sodium hydroxide Environmental chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Ammonium lcsh:Environmental sciences 0105 earth and related environmental sciences |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP SOIL, Vol 4, Pp 195-212 (2018) |
| ISSN: | 2199-398X |
| Popis: | Amazonian soils are heterogeneous. However, few studies have been carried out in the Amazon, mainly because of its considerable size, which complicates the collection of data and the ability to plan for the sustainable use of natural resources. In this study, the physical, chemical, and mineralogical attributes of soils in the state of Pará, Brazil, were characterized by examining the particle size, fertility, silicon extracted by sodium hydroxide, iron, and aluminum, and manganese extracted by sulfuric acid, sodium citrate-bicarbonate-dithionite, and ammonium oxalate + oxalic acid. A descriptive analysis, multivariate principal component analysis, and cluster analysis were performed. The soils had low concentrations of bioavailable P, Ca2+, Mg2+, and K and had high concentrations of Al3+, Si, and Al oxide in the Cambisols. Concentrations of Fe and Mn oxides were higher in both the Cambisols and Nitosols, which are rich in oxidic minerals. The multivariate analysis indicated an association between the organic carbon content and pH, P, Ca, Mg, and K concentrations. An additional association was observed between clay, potential acidity, and the Fe and Al oxide concentrations. |
| Databáze: | OpenAIRE |
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