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Title: Growing Eremanthus erythropappus in crushed laterite : a promising alternative to topsoil for bauxite-mine revegetation.
Authors: Machado, Naiara Amaral de Miranda
Leite, Mariangela Garcia Praça
Figueiredo, Maurílio Assis
Kozovits, Alessandra Rodrigues
Keywords: Allometry
Eremanthus erytropappus
Particles size reduction
Iron duricrust
Issue Date: 2013
Citation: MACHADO, N. A. de M. et al. Growing Eremanthus erythropappus in crushed laterite : a promising alternative to topsoil for bauxite-mine revegetation. Journal of Environmental Management, v. 129, p. 149-156 , 2013. Disponível em: <>. Acesso em: 28 nov. 2013.
Abstract: Topsoil is the preferred substrate for areas requiring rehabilitation after bauxite ining. However, topsoil is sometimes lacking and so there is a need to test the suitability of other, locally available substrates. In an abandoned bauxite mine in Southeastern Brazil, small patches of native vegetation spontaneously established in shallow depressions over weathered laterite, suggesting that granulometric reduction may have facilitated the establishment of plants. To test this hypothesis, blocks of laterite collected in the area were crushed to simulate texture observed in the vegetation patches. Topsoil collected in a preserved ferruginous field near to the extraction area was also used as a substrate in which Eremanthus erythropappus seedlings, a native woody species, were grown. Seedlings were cultivated without fertilizers in these two substrates and also directly over the exposed and uncrushed laterite. The species proved to be very promising for the revegetation, showing a high survival rate in all substrates. Higher annual growth rates and higher final biomass values were observed in topsoil, but the granulometric reduction of laterite doubled plant growth rate in comparison to the exposed laterite. This result was likely due to the increased availability of essential nutrients to plants and to the improvement in physical conditions for root growth and functioning. Moreover, seedling allometry was not altered by the type of substrate, suggesting that the species was highly tolerant to the new substrate conditions, a fundamental characteristic for success of revegetation of bauxite extraction degraded areas
ISSN: 0301-4797
metadata.dc.rights.license: O Periódico Journal of Environmental Management concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença 3273050063476
Appears in Collections:DEGEO - Artigos de periódicos

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