Data/hora: 17/06/2024 12:04:30

Provedor de dados: | Anais da Academia Brasileira de Ciências
País: | Brazil
Título: | Use of pedological maps in the identification of sensitivity of soils to acidic deposition: application to Brazilian soils
Autores: | Melfi,Adolpho J.; Montes,Celia R.; Carvalho,Adilson; Forti,Maria Cristina.
Data: | 2004-03-01
Ano: | 2004
Palavras-chave: | Brazilian soils; Pedogeochemical map; Soil buffering ability.
Resumo: | 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 formed by well-developed and mature soils, constituted by clay minerals of kaolinite type associated with variable amount of gibbsite. About 8% of the soils can be considered as the least sensitive class. They correspond to Topomorphic Vertisols (Vertissolo, Embrapa 1999), Planosols (Planossolo, Embrapa 1999) and saline soils. Finally, the remaining soils represent the balanced media that dominate the northeastern semiarid zones and the south and northeastern subtropical zones.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100012
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/S0001-37652004000100012
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.76 n.1 2004
Fonte: | info:eu-repo/semantics/openAccess