SciELO - Scientific Electronic Library Online

 
vol.20 issue2Identification and characterization of Leifsonia xyli subsp. xyli as sugarcane pathogen (Saccharum sp.) in the Centro Occidental region of VenezuelaEvaluation of two forms of localized irrigation on growth and yield of eggplant crop author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • Have no similar articlesSimilars in SciELO

Share


Bioagro

Print version ISSN 1316-3361

Abstract

MARTINEZ, Yadira; RIVERO, Carmen  and  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.

Keywords : Heavy metals; residues; organic matter; Mariara; Guacara.

        · abstract in Spanish     · text in Spanish