Use of pedological maps in the identification of sensitivity of soils to acidic deposition: application to Brazilian soils

Anais da Academia Brasileira de Ciências

Adolpho J. Melfi²  Celia R. Montes²  Adilson Carvalho¹  Maria Cristina Forti¹ 

[1] ,Universidade de São Paulo Escola Superior de Agricultura Luiz de Queiroz Departamento de Solos e Nutrição de PlantasPiracicaba,Brasil

关键词: Brazilian soils;    pedogeochemical map;    soil buffering ability;    solos brasileiros;    mapa pedogeoquímico;    poder tampão de solos;   

DOI  :  10.1590/S0001-37652004000100012

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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