SciELO - Scientific Electronic Library Online

vol.54 issue2Bacillus thuringiensis in caterpillars and associated materials collected from protected tropical forests in northwestern Costa RicaEpiphytic diatoms associated with red mangrove (Rhizophora mangle) prop roots in Bahía Magdalena, Baja California Sur, Mexico author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista de Biología Tropical

On-line version ISSN 0034-7744Print version ISSN 0034-7744


GOMEZ, Y  and  PAOLINI, J. Actividad microbiana en suelos de sabanas de los Llanos Orientales de Venezuela convertidas en pasturas. Rev. biol. trop [online]. 2006, vol.54, n.2, pp.273-285. ISSN 0034-7744.

Microbial activity in Eastern Venezuelan savannas turned into grasslands. We studied the effects of season and management practices on chemical properties and biochemical parameters in a typical Ultisol soil of native and introduced pastures of the Eastern savannas of Venezuela. Sseason, soil management, and their interaction, significantly affected chemical properties and biochemical parameters. The total carbon and the water soluble carbon experienced a significant decrease during the wet pereiod. The basal respiration, the arginine ammonification (AA) and the fluoriscein diacetate hydrolysis showed showed a relatively low microbial activity. The transformation of native savannas to pastures systems of B. brizantha and S. capitata increased the organic matter content in soil. The AA and the basal respiration were sensible indicators to estimate changes in soil quality and also reflected the interaction of temporal changes and management practices. Rev. Biol. Trop. 54(2): 273-285. Epub 2006 Jun 01.

Keywords : arginine ammonification; basal respiration; fluoriscein diacetate; management practices; savannas; temporal variability; Venezuela.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License