SciELO - Scientific Electronic Library Online

vol.24 número2Análisis de los escurrimientos de una microcuenca de Pampa Ondulada bajo diferentes sistemas de labranza índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados



  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO


Ciencia del suelo

versión On-line ISSN 1850-2067


MARTINEZ, Daniel A. et al. Physical and hydraulic properties of perlites used in rose cultures and their dependency on time. Cienc. suelo [online]. 2006, vol.24, n.2, pp. 177-182. ISSN 1850-2067.

Physical and hydraulic properties of perlite used as unique substrate in a greenhouse cut roses (Rosa hybrida L.) culture and their dependence on time were investigated. Samples of, perlite with 0,28 and 39 months of use, extracted from the rhizosphere, were analyzed. Bulk density (DA), real density of intact particles (DRI) real density of pulverized particles (DRP), particle size distribution, air capacity (CA), available water (AFD), unavailable water (AR) and effective porosity (PE) were determined. Non-saturated hydraulic conductivity (Kns) was obtained using the Mualemvan Genuchten model. It was found cracking of particles with diameters greater than 2 mm and an increment of the fraction between 1 mm and 2 mm after 28 and 39 months of use. No significant alteration of particles with diameters smaller than 0,5 mm was found. Values of PE and CA increased with time of use, while values of AFD, AR showed no variation. The increment of PE with time of use could be explained as a consequence of particle breakdown due to roots, or tiny particle drift from the rhizosphere. Accordingly with the increment of CA, a diminution in one order of magnitude of Kns after 39 months of use was found.

Palabras clave : Substrates; Water availability; Hydraulic conductivity.

        · resumen en Español     · texto en Español     · Español ( pdf )


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