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Distribución de bacterias potencialmente fijadoras de nitrógeno y su relación con parámetros fisicoquímicos en suelos con tres coberturas vegetales en el sur de la Amazonia colombiana

Mantilla-Paredes A, Cardona G, Peña-Venegas C, Murcia U, Rodríguez M, Zambrano M ...see all

Revista de Biologia Tropical, vol. 57, issue 4 (2009) pp. 915-927

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Abstract

Distribution of potentially nitrogen-fixing bacteria and its relationship with physicochemical parameters in soils with three vegetation types in the southern Colombian Amazon region. Potentially nitrogen-fixing microaerobic and aerobic bacteria were isolated from several Colombian Amazon soils (for-est, pastures and chagras) and two landscapes (floodable and non floodable areas). The abundance and distri-bution of bacteria were evaluated, as well as their relationship with soil physical and chemical characteristics. Landscape had a direct influence on the abundance of the microaerobic bacteria, with higher numbers in forest and pasture soils in non-floodable zones. The aerobic isolates (N=51) were grouped into 19 morphologies, with the highest numbers found in forest soil in floodable zones. A higher number of aerobic morphologies was shared among forest sites (Nonmetric Multidimensional Scaling and Analysis of Similarity p

Author-supplied keywords

  • Amazon soil
  • Floodable zone
  • Forest transformation
  • Nitrogen-fixing bacteria
  • Non floodable zone

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Authors

  • Andrea J. Mantilla-Paredes

  • Gladys I. Cardona

  • Clara P. Peña-Venegas

  • Mariana Rodríguez

  • Maria M. Zambrano

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