Journal of Tropical Forest Science 13 (1): 116-129 (2001) VEGETATIVE PROPAGATION OF LOVOA TRICHILIOIDES: EFFECT PROVENANCEF O S , SUBSTRATE, AUXIND AN S LEAF AREA Z. Tchoundjeu International Centre for Research in Agroforestry (ICRtVF), BP 2123, Yaounde, Cameroon; e-mail:
[email protected] & R. R. B. Leakey Centre for Ecology and Hydrology (CEH), Bush Estate, Penicuik, Midlothian, EH26 OQB, Scotland, United Kingdom; e-mail:
[email protected] Received October 1998_______________________________________________ TCHOUNDJEU, Z. & LEAKEY, R. R. B. 2001. Vegetative propagation of Lovoa trichilioides: effects of provenance, substrate, auxins and leaf area. Lovoa trichilioides (African walnut, dibetou or bibolo) is an important commercial timber species indigenou Weso st Centra d tan l Africa. However destructiolace e ,seedth th f k o d san n of young seedlings by shoot-borers have hampered large-scale regeneration of this species. As vegetative propagation is an effective means of multiplying selected trees within a tree improvement programme, this study focused on the main factors affecting rootine th g abilit f leafyo y stem cuttings. When testing different rooting substrates, single-node, leafy stem cuttings rooted significantly better in coarse gravel than in a forest topsoil-gravel mixture. The application of indole-3-butyric acid (IBA) had no clear effect on mean rooting perentage, although three out of four treatments with differing concentrations of IBA gave final results that were significantly better than controle th . However, 50u considerege b IB appropriatn n Aa ca e b o dt e concentration to promote their rooting. Rooting ability was also affected by the node position. Cuttings fro e apicamth l nodes rooted significantly better than those from basal nodes of the same stem.