African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12294

Full Length Research Paper

Allelopathic effect of aqueous extract of fresh leaf castor beans (Ricinus communis L.) applied to the beginning stage of soy (Glycine max L.) and safflower (Carthamus tinctorius L.)

Renathielly Fernanda da Silva
  • Renathielly Fernanda da Silva
  • Civil Engineers, UNIOESTE - Universidade Estadual do Oeste do Paraná. Universitária Street, 2069. Postcode 85.819-130. Faculdade, Cascavel - PR, Brasil.
  • Google Scholar
Rodrigo Techio Bressan
  • Rodrigo Techio Bressan
  • Civil Engineers, UNIOESTE - Universidade Estadual do Oeste do Paraná. Universitária Street, 2069. Postcode 85.819-130. Faculdade, Cascavel - PR, Brasil.
  • Google Scholar
Bruno Meneghel Zilli
  • Bruno Meneghel Zilli
  • Electrical Engineer, UNIOESTE - Universidade Estadual do Oeste do Paraná. Universitária Street, 2069. Postcode 85.819-130. Faculdade, Cascavel - PR, Brasil.
  • Google Scholar
Maurício Antônio Pilatti
  • Maurício Antônio Pilatti
  • Agricultural Engineer, UNIOESTE - Universidade Estadual do Oeste do Paraná. Universitária Street, 2069. Postcode 85.819-130. Faculdade, Cascavel - PR, Brasil.
  • Google Scholar
Samuel Nelson Melegari de Souza
  • Samuel Nelson Melegari de Souza
  • Energy Systems Planning, UNIOESTE - Universidade Estadual do Oeste do Paraná. Universitária Street, 2069. Postcode 85.819-130. Faculdade, Cascavel - PR, Brasil.
  • Google Scholar
Reginaldo Ferreira Santos
  • Reginaldo Ferreira Santos
  • Irrigation and Drainage (Irrigation Management), UNIOESTE - Universidade Estadual do Oeste do Paraná. Universitária Street, 2069. Postcode 85.819-130. Faculdade, Cascavel – PR, Brasil.
  • Google Scholar


  •  Received: 29 September 2016
  •  Accepted: 17 November 2016
  •  Published: 07 December 2016

Abstract

Allelopathy defines the production of specific biomolecules (allelochemical) by a plant that can induce positive or negative impacts on another culture. The crop of castor beans (Ricinus communis L.) is being economically valued and receiving attention, mainly by the biodiesel production, castor oil and animal feeding. In this study, the allelopathic effect of aqueous extract from fresh leaves of castor beans (Ricinus communis L.) applied to the beginning stage of soy (Glycine max L.) and of safflower (Carthamus tinctorius L.) was investigated. An experimental was setup with five blocks and four replications, considering that each block refers to a concentration of extract of castor beans fresh leaf (0, 25, 50, 75 and 100%); the one without castor beans leaves was taken as ‘witness’. The statistic treatment was done using analysis of variance (ANOVA) and Tukey test with an error rate of 5%. The result showed evidences that there are allelopathic effects among the extract of castor beans fresh leaf and the beginning stage of soy and safflower only in the root part of the seedling.

Key words: Ricinus communis L., Glycine max L., allelopaty.