SciELO - Scientific Electronic Library Online

 
vol.20 número2Identificación y caracterización de leifsonia xyli subsp. xyli como patógeno de la caña de azúcar (saccharum sp.) en la región centro occidental de VenezuelaEvaluación de dos formas de aplicación del riego sobre el crecimiento y producción de la berenjena índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • No hay articulos similaresSimilares en SciELO

Compartir


Bioagro

versión impresa ISSN 1316-3361

Resumen

MARTINEZ, Yadira; RIVERO, Carmen  y  LOPEZ, Liliana. Effect of paper sludge application on nickel fractions in soils of Valencia lake basin, Venezuela. Bioagro [online]. 2008, vol.20, n.2, pp.119-130. ISSN 1316-3361.

Nickel is one of the main heavy metals, potentially toxic to plants, found in sludge. The objective of this paper was to evaluate the effect of applications of paper industry sludge on the following nickel fractions in the soil: hydrosoluble (Ni-H2O), extractable with MgCl2 (Ni-interchangeable), extractable with NaOCl (Ni-organic) and extractable with HNO3 (Ni-residual). Two representative soils of Valencia  lake basin (Mariara and Guacara)  in Venezuela were used, each receiving dose of 15,  75 and 105 Mg×ha-1, plus a control with no application of sludge. Each of these four treatments was used in presence or absence of a crop (corn). It was found that the application of different dose of sludge and the presence of the crop modified the different fractions. Although the hydrosoluble fraction tended to increase due to the addition of sludge in both soils, the concentrations were low. The low values associated to hydrosoluble and exchangeable fractions in the different treatments indicate that the use of this sludge does not represent an important risk of translocation  into these nickel fractions, forms considered the most available to plants.

Palabras clave : Heavy metals; residues; organic matter; Mariara; Guacara.

        · resumen en Español     · texto en Español