Journal of
Horticulture and Forestry

  • Abbreviation: J. Hortic. For.
  • Language: English
  • ISSN: 2006-9782
  • DOI: 10.5897/JHF
  • Start Year: 2009
  • Published Articles: 299

Full Length Research Paper

The effects of different concentrations of indole-3-butyric acid (IBA) on leafy stem cuttings of four tropical timber species

Egbe E. A.
  • Egbe E. A.
  • Department of Plant and Animal Sciences, Faculty of Science, University of Buea, P. O. Box 63, Buea, Cameroon.
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Chuyong G. B.
  • Chuyong G. B.
  • Department of Plant and Animal Sciences, Faculty of Science, University of Buea, P. O. Box 63, Buea, Cameroon.
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Fonge A. B.
  • Fonge A. B.
  • Department of Plant and Animal Sciences, Faculty of Science, University of Buea, P. O. Box 63, Buea, Cameroon.
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Tata B. L.
  • Tata B. L.
  • Department of Plant and Animal Sciences, Faculty of Science, University of Buea, P. O. Box 63, Buea, Cameroon.
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Tabot P. T.
  • Tabot P. T.
  • Department of Plant and Animal Sciences, Faculty of Science, University of Buea, P. O. Box 63, Buea, Cameroon.
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  •  Accepted: 12 March 2012
  •  Published: 22 March 2012

Abstract

The effects of different concentrations of indole-3-butyric acid (IBA) on the rooting of leafy stem cuttings of Albizia zygia, Blighia welwitschii, Lophira alata andPterocarpus soyauxii were investigated using non-mist propagators. Four hormone concentrations were used; 16000, 8000, 4000 and 0 µg ml-1 (control). Results indicated that AlbiziaBlighia and Lophira cuttings rooted best when treated with 16000 µg ml-1 IBA (80, 100 and 40% respectively) and their control cuttings did not root. Pterocarpus stem cuttings treated with 8000 and 4000 µg ml-1 had 100% rooting while those treated with 16000 µg ml-1 and control was 80%. The highest root number was noted in cuttings of the various species treated with 16000 µg ml-1IBA and there were significantly differences only from treatments of Blighia andPterocarpus species. Stem cuttings treated with IBA at 16000 µg ml-1 also gave the fastest rooting time which ranged from 18 to 78 days. Stem cuttings of Blighia,Albizia and Lophira species treated with16000 µg ml-1 IBA also had the longest roots (2.48, 1.23 and 1.45 cm respectively). The longest root length of Pterocarpuswas observed in cuttings treated with 8000 µg ml-1 of IBA (3.72 cm). Vegetative production of seedlings of these species is essential for reforestation programmes.

 

Key words: Timber species, indole -3- butyric acid, leafy stem cuttings, rooting time, percentage rooting.