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Kenaf (Hibiscus cannabinus L.) Impact on Post-Germination Seedling Growth

Author

Listed:
  • Charles Webber III
  • Paul White Jr
  • Dwight Myers
  • James Shrefler
  • Merritt Taylor

Abstract

The chemical interaction between plants, which is referred to as allelopathy, may result in the inhibition of plant growth and development. The objective of this research was to determine the impact of kenaf (Hibiscus cannabinus L.) plant extracts on the post-germination growth of five plant species. Four concentrations (0, 16.7, 33.3 and 66.7 g/L) of kenaf bark, core, and leaf extracts were applied to the germinated seeds of redroot pigweed (Amaranthus retroflexus L.), green bean (Phaseolus vulgaris L.), tomato (Solanum lycopersicum Mill.), cucumber (Cucumis sativus L.), and Italian ryegrass (Lolium multiflorum Lam.). After 7 days, the developing seedlings were measured to determine the length of their hypocotyls (mm) and radicles (mm), and the number of hair roots. Tomato, Italian ryegrass, and redroot pigweed followed similar negative trends in their responses to the extract source (kenaf bark, core, and leaves) and the impact of extract concentration, whereas, cucumber had a mixed response and green bean reacted positively to the kenaf extracts. Tomato was the most sensitive species tested across all kenaf extracts and concentrations, resulting in decreased hypocotyl, radicle, and root growth. Green bean exhibited no negative effects due to the kenaf extracts, but actually produced increased hypocotyl growth as a result of the kenaf bark, core, and leaf extracts. The kenaf extracts resulted in a mixed response for cucumber. The kenaf leaf and bark extract decreased cucumber radicle growth, whereas, the bark and core extracts increased hypocotyl growth. Italian ryegrass hypocotyl growth decreased across all extract sources (bark, core, and leaf), while the leaf extract also reduced root growth. All kenaf extracts reduced redroot pigweed radicle growth, while the core and leaf extracts reduced hypocotyl growth. The research demonstrated that kenaf leaf extracts were the most allelopathic and the hypocotyls were the most sensitive. Future research should isolate the chemicals responsible for both the negative and positive allelopathic impact on the various plant species, determine if the extracts will influence more mature plants, and pursue cultural practices to utilize these natural allelopathic materials to benefit crop production and limit weed competition.

Suggested Citation

  • Charles Webber III & Paul White Jr & Dwight Myers & James Shrefler & Merritt Taylor, 2015. "Kenaf (Hibiscus cannabinus L.) Impact on Post-Germination Seedling Growth," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 7(12), pages 1-91, November.
  • Handle: RePEc:ibn:jasjnl:v:7:y:2015:i:12:p:91
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    File URL: https://ccsenet.org/journal/index.php/jas/article/view/53154
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    References listed on IDEAS

    as
    1. Charles Webber III & Paul White Jr & Dwight Myers & Merritt Taylor & James Shrefler, 2015. "Impact of Kenaf (Hibiscus cannabinus L.) Leaf, Bark, and Core Extracts on Germination of Five Plant Species," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 7(2), pages 1-93, January.
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    Cited by:

    1. Charles Webber III & Paul White Jr. & Caleb Dalley & Eric Petrie & Ryan Viator & James Shrefler, 2016. "Kenaf (Hibiscus cannabinus) and Cowpea (Vigna unguiculata) as Sugarcane Cover Crops," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 8(8), pages 1-13, July.

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      JEL classification:

      • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
      • Z0 - Other Special Topics - - General

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