Journal of Chemical Ecology

, Volume 14, Issue 3, pp 733–741

Biological suppression of nitrification by selected cultivars ofHelianthus annum L.

  • Ibrahim S. AlSaadawi

DOI: 10.1007/BF01018768

Cite this article as:
AlSaadawi, I.S. J Chem Ecol (1988) 14: 733. doi:10.1007/BF01018768


The allelopathic potential of different cultivars ofHelianthus annuus against nitrification was studied using the soil incubation method. The results indicated that aqueous extracts and residues of roots and shoots of all test cultivars significantly reduced the nitrification rate in soil. However, cultivars Local and Citosol were found to be more inhibitory to nitrification than others.

Key words

Allelopathy Helianthus annuus nitrification inhibition biological control 

Copyright information

© Plenum Publishing Corporation 1988

Authors and Affiliations

  • Ibrahim S. AlSaadawi
    • 1
  1. 1.Department of BotanyFaculty of Agriculture and Biology Nuclear Research CenterBaghdadIraq

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