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Revista Brasileira de Ciência do Solo

versão On-line ISSN 1806-9657

Resumo

PADUA, Tullio Raphael Pereira de; SILVA, Carlos Alberto  e  MELO, Leônidas Carrijo Azevedo. Liming in a latosol under influence of cover crops: acidity neutralization. Rev. Bras. Ciênc. Solo [online]. 2006, vol.30, n.5, pp.869-878. ISSN 1806-9657.  http://dx.doi.org/10.1590/S0100-06832006000500013.

Lime mobility and soil acidity correction can be influenced by liming management and the quantity and quality of soil organic matter. Acidity neutralization in function of the lime incoporation and surface liming was evaluated in a red Latosol (Oxisol) under different antecedent vegetation covers (eucalyptus, forest, pasture and pine). The study was carried out from November 2002 to January 2003 at the Soil Science Department of the Lavras Federal University. After 30 days of incubation of soils with lime, the contents of Ca2+ e Al3+, pH and base saturation levels were quantified at the 0-5, 5-10, 10-20 and 20-40 cm sample depths. At the depth of 0-5 cm, surface liming promoted an increase in pH, base saturation and Ca2+ to levels above those considered optimal for cotton growth, thus characterizing overliming. Compared to the area without liming, the levels of pH, Ca2+ and base saturation were higher in layers beneath those of lime incorporation, mainly in the samples with highest organic matter content. No such effects were verified in the subsoil layer (20- 40 cm).

Palavras-chave : base mobility; surface liming; Gossypium hirsutum L.; organic matter; chemical attributes.

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