Resumo

HERNANDEZ-JIMENEZ, Alberto; LLANES-HERNANDEZ, Violeta; TERRY-ALFONSO, Elein  e  CARNERO-LAZO, Greter. Ph changes in brown soils of Cuba when eroded. cultrop [online]. 2020, vol.41, n.2, e04.  Epub 24-Abr-2020. ISSN 0258-5936.

In the last 15 years, it has been considering that in Cuba the process of soils degradation by acidification occurs with some intensity. It is about that 40 % of the whole Cuban territory the soils are affected by this process, with an increase or 2.9 % annually. Besides, that with erosion processes occur the acidification of soils. The objective of this paper is to demonstrate that this problem is no really. The increase of soil acidity by soil erosion take place only in Allitics Group of soils, which have a B horizon with a high content of exchangeable aluminum and pH value equal or less than 4,5, but these soils are few extensive in Cuba occupying 555 400 ha that is only 5 % of the territory. The main objective of this paper is to demonstrate that soils of Brown Siallitic Group (that are the most extensive in Cuba, occupying 2 355 800 ha, that is 21 % of the country), when are affected by erosion process increase the pH value because these soils with the depth the pH value is higher. These results show that the acidification process in Cuban soils isn´t so intensive, as is present in some papers.

Palavras-chave : acidity; soil degradation; soil reaction.

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