Effect of rooting media and indole-3-butyric acid concentrations on regeneration potential of Elgon Olive (Olea welwitschii (Knobl.) Gilg & Schellenb) stem cuttings

  • S M Maduka
  • T J Msogoya
  • S A O Chamshama
Keywords: Dormancy, alternative, multiplication, stem cuttings, rooting variables, optimum


Elgon olive which is prized for durable
structures and furniture has become rare and
efforts to increase its population have been
hampered by poor seed germination rates
associated with dormancy. Search for
alternative multiplication of the species is
therefore important. The effect of rooting
media and rooting hormone on regeneration
potential of O. welwitschii were evaluated
using leafy juvenile stem cuttings as an
alternative multiplication method. A
factorial experiment with 3 x 3 treatment
combinations was established in a non-mist
propagator in a complete randomized design
with three replications. Factor one had three
types of rooting media (fine river sand
mixed with decomposed sawdust at 1:1 v/v,
red clay subsoil and fine river sand) and
factor two was rooting hormone indole-3-
butyric acid (IBA) with three concentrations
(0, 3000 and 6000 ppm). Data on rooting
percentages and rooting variables were
subjected to analysis of variance using SAS.
The combination of fine sand mixed with
decomposed sawdust media and cuttings
treated with IBA at 6000 ppm provided the
highest (p < 0.05) rooting of 92.3% and
largest (p < 0.05) number of roots per
cutting of 13.77. The combination of fine
river sand mixed with decomposed sawdust
and treated leafy juvenile stem cuttings with
IBA at concentration of 6000 ppm is
recommended as alternative technique for
optimum production of O. welwitschii
planting materials.

Journal Identifiers

eISSN: 2408-8137
print ISSN: 2408-8129