Relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture
The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture. Twelve collection points were chosen in the Distrito Federal and in Formosa municipality, Goiás state, Brazil, representing four soil grou...
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Published in | Pesquisa agropecuaria brasileira Vol. 44; no. 8; pp. 996 - 1001 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Embrapa Informação TecnológicaPesquisa Agropecuária Brasileira
01.08.2009
Embrapa Secretaria de Pesquisa e Desenvolvimento; Pesquisa Agropecuária Brasileira |
Subjects | |
Online Access | Get full text |
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Summary: | The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture. Twelve collection points were chosen in the Distrito Federal and in Formosa municipality, Goiás state, Brazil, representing four soil groups with varied levels of calcium + magnesium and kaolinite/(kaolinite + gibbsite) ratios. Soil macrofauna was collected in triplicate at each collection point, and identified at the level of taxonomic groups. Macrofauna density showed correlation with contents of kaolinite, gibbsite and exchangeable Ca + Mg in the soils. Mineralogy and exchangeable Ca + Mg had significant effects on taxonomic groups and relative density of soil macrofauna. The termites (Isoptera) were more abundant in soils with low exchangeable Ca + Mg; earthworms (Oligochaeta), in soils with high levels of kaolinite; and Hemiptera and Coleoptera larvae were more abundant in gibbsitic soils with higher contents of total carbon.
O objetivo deste trabalho foi avaliar as relações entre a macrofauna, a mineralogia e os teores de cálcio e magnésio, em latossolos do Cerrado sob pastagem. Doze pontos de coleta foram escolhidos no Distrito Federal e no Município de Formosa, GO, e representaram quatro grupos de solo com variados teores de cálcio + magnésio e razões caulinita/(caulinita + gibsita). A macrofauna do solo foi coletada em triplicata, em cada ponto, e identificada quanto ao grupo taxonômico. A densidade da macrofauna foi relacionada aos teores de caulinita, gibsita e Ca + Mg trocáveis. Houve efeito significativo da mineralogia e dos teores de Ca + Mg trocáveis sobre os grupos taxonômicos e sobre a densidade relativa da macrofauna edáfica. Verificou-se maior densidade de Isoptera nos solos com baixos teores de Ca + Mg, de Oligochaeta nos solos cauliníticos, e maior densidade de Hemiptera e larvas de Coleoptera nos solos gibsiticos e com maiores teores de carbono total. |
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Bibliography: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800031 10.1590/S0100-204X2009000800031 |
ISSN: | 0100-204X 1678-3921 1678-3921 0100-204X |
DOI: | 10.1590/S0100-204X2009000800031 |