Consulta: subjectFacets:"Brazilian soils"
Registros recuperados: 3
Data/hora: 08/06/2024 18:00:26

Use of pedological maps in the identification of sensitivity of soils to acidic deposition: application to Brazilian soils
Provedor de dados: 42
Autores: Melfi,Adolpho J.; Montes,Celia R.; Carvalho,Adilson; Forti,Maria Cristina.
The pedogeochemical maps present the spatial distribution of soils according to crystalochemical parameters (clay fraction) and physic-chemical aspects of the sorting complex (CEC and BS). These maps are adequate tool for environmental studies and particularly, for the analysis of the terrestrial ecosystem sensibility to acidic deposition. The pedogeochemical maps of the Brazilian soils, elaborated using FAO SoilWorld Map, allowed establishing the soil distribution according to 5 classes of vulnerability to acidic deposition, as defined by Stockholm Environmental Institute (SEI). From these maps, it is observed that about 50% of the Brazilian soils are high vulnerable to acidic deposition and can be included within the most sensitive class. This group is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazilian soils; Pedogeochemical map; Soil buffering ability.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100012

Bacterial communities in mining soils and surrounding areas under regeneration process in a former ore mine
Provedor de dados: 58
Autores: Fernandes,Camila Cesário; Kishi,Luciano Takeshi; Lopes,Erica Mendes; Omori,Wellington Pine; Souza,Jackson Antonio Marcondes de; Alves,Lucia Maria Carareto; Lemos,Eliana Gertrudes de Macedo.
Abstract Human activities on the Earth's surface change the landscape of natural ecosystems. Mining practices are one of the most severe human activities, drastically altering the chemical, physical and biological properties of the soil environment. Bacterial communities in soil play an important role in the maintenance of ecological relationships. This work shows bacterial diversity, metabolic repertoire and physiological behavior in five ecosystems samples with different levels of impact. These ecosystems belong to a historical area in Iron Quadrangle, Minas Gerais, Brazil, which suffered mining activities until its total depletion without recovery since today. The results revealed Proteobacteria as the most predominant phylum followed by Acidobacteria,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Iron mine; Bacterial diversity; Functional diversity; Brazilian soils.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300489

Soil management and ionic strength on selenite retention in oxidic soils
Provedor de dados: 64
Autores: Araujo,Anderson Mendes; Lessa,Josimar Henrique de Lima; Ferreira,Liniker André; Guilherme,Luiz Roberto Guimarães; Lopes,Guilherme.
ABSTRACT Sorption of selenium (Se) on soils may be influenced by factors that are changed though agricultural practices usually performed for crop production, such as soil pH, competing anion and organic matter contents, among others. This study aimed to evaluate the influence of soil management and ionic strength (IS) on Se retention in Brazilian soils, which is important to predict Se availability in both systems, native and cultivated soils. For that, adsorption and desorption reactions of Se were evaluated in 16 soil samples (eight from cultivated soils and eight from native soils), using solutions containing 100 and 500 µg L-1 Se in the form of sodium selenate and in two IS, 15 and 150 mM. Se adsorption varied as a function of IS for most soils, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adsorption/desorption reactions; Brazilian soils; Competitive anion; Soil cultivation; Retention/mobility.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000400395