African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12024

Full Length Research Paper

The influence of potassium dichromate on growth and survival of the vermicomposting earthworm Eisenia foetida

Martha Angelica Ramirez Tabche
  • Martha Angelica Ramirez Tabche
  • Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional – Unidad Irapuato. CP. 36821 Irapuato, Gto., México.
  • Google Scholar
Juan Jose Pena Cabriales
  • Juan Jose Pena Cabriales
  • Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional – Unidad Irapuato. CP. 36821 Irapuato, Gto., México.
  • Google Scholar
Maria Maldonado Vega
  • Maria Maldonado Vega
  • Dirección de Planeación, Enseñanza e Investigación del Hospital Regional de Alta Especialidad del Bajío. CP. 37660 León, Gto., México.
  • Google Scholar
Jose Antonio Vera-Nunez
  • Jose Antonio Vera-Nunez
  • Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional – Unidad Irapuato. CP. 36821 Irapuato, Gto., México.
  • Google Scholar


  •  Received: 29 March 2016
  •  Accepted: 26 October 2016
  •  Published: 17 May 2017

Abstract

The present research evaluated the redox ability of Cr6+ in the earthworm Eisenia foetida, and its effects on growth and survival. An assay was conducted with an increasing doses of K2Cr2O7 (0, 200, 400, 800, 1000, and 1200 mg K2Cr2O7 kg-1 substrate) applied to a vermicomposting system which was inoculated with 30 earthworms per chamber. Earthworm growth, estimated by weight, showed a quadratic response (p = 0.03) with the lowest estimated growth at a dose of 435 mg K2Cr2O7 kg-1. Chromium (Cr) concentration increments were positively associated to mortality in adults and cocoons (p < 0.01), and total Cr accumulation in earthworms (p < 0.01). The accumulation of chromium in worms, is an indicator of the capacity of worms to resist different doses of potassium dichromate and, the effect on accumulation of Cr (VI) in vermicomposting was higher (p = 0.11). The difference of potassium dichromate in worms could indicate the oxide reduction in E. fetidae.

 

Key words: Redox chromium, growth, survival, Eisenia foetida.