African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Allelopathic effect of irrigation with different concentrations of leaf extracts of Jatropha curcas L. on growth Brassica oleracea

Jhonatas Antonelli
  • Jhonatas Antonelli
  • Department of Agricultural Energy, University of West Paraná, Paraná, Brazil.
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Cleber Antonio Lindino
  • Cleber Antonio Lindino
  • Department of Agricultural Energy, University of West Paraná, Paraná, Brazil.
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Reinaldo Aparecido Bariccatti
  • Reinaldo Aparecido Bariccatti
  • Department of Agricultural Energy, University of West Paraná, Paraná, Brazil.
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Samuel Nelson Melegari de Souza
  • Samuel Nelson Melegari de Souza
  • Department of Agricultural Energy, University of West Paraná, Paraná, Brazil.
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Willian Cezar Nadaletti
  • Willian Cezar Nadaletti
  • Department of Agricultural Energy, University of West Paraná, Paraná, Brazil.
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Paulo André Cremonez
  • Paulo André Cremonez
  • Department of Agricultural Energy, University of West Paraná, Paraná, Brazil.
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Eduardo Rossi
  • Eduardo Rossi
  • Department of Agricultural Energy, University of West Paraná, Paraná, Brazil.
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  •  Received: 23 July 2013
  •  Accepted: 18 September 2015
  •  Published: 03 March 2016

Abstract

The competition for sunlight, nutrients or space makes many plants from releasing toxins that can harm the growth and development of competing plants. This work aims to measure the allelopathic effect of the physic nut leaf extract on the cabbage plantation growth. The experiment was conducted in the Missal city, state of Parana, Brazil. It was used 6 different concentrations of extract Jatropha. curcas L., as follow: 0, 5, 10, 20, 40, 80%. After 30 days of cultivation it was performed analysis of the following parameters of the crop development: Stalk diameter, stalk length, leaf area, root length, fresh and dry matter of root, fresh and dry matter of air portion, and the evaluated parameters varied in accordance with different levels of J. curcas extract.

 

Key words: Purging nut, alellochemicals, allelopathy, foliar extracts, irrigation.