Effects of pre-severance irradiance on the growth of Allanblackia floribunda Oliv. stockplants and on the subsequent rooting capacity of leafy stem cuttings
- 81 Downloads
The rooting of Allanblackia stem cuttings is typically slow and with the formation of very few roots. Irradiance has positive effects on the relative growth of plants and rooting ability, but there is no information relating to Allanblackia species. Stumps of Allanblackia floribunda Oliv. were grown under three levels of irradiance (2008 µmol m−2s−1, 542 µmol m−2s−1 and 160 µmol m−2s−1) and were assessed for growth (plant height and the number of cuttings) and the influence of irradiance on the rooting ability of leafy stem cuttings. Shade light regime 542 µmol m−2s−1 resulted in significantly greater stockplant height than in 160 and 2008 µmol m−2s−1. Significantly more useable cuttings were harvested from the tall plants under an irradiance of 542 µmol m−2s−1, fewer from 160 µmol m−2s−1, and the least from 2008 µmol m−2s−1. The rooting ability of cuttings was greatest from stockplants receiving 542 µmol m−2s−1 (> 60%) and least from those receiving 160 µmol m−2s−1 (20%). 45% of cutting rooted from stockplants under full sun (2008 µmol m−2s−1). The speed of rooting of cuttings followed the same ranking with the fastest rooting from plants receiving 542 µmol m−2s−1 (7.1 ± 1.04 weeks to reach 25% of rooting) and the slowest from those under 160 µmol m−2s−1 (12.3 ± 1.85 weeks to reach 25% of rooting). The results of this study demonstrate that the light management of A. floribunda stockplants is important for the maximization of the yielding of cutting and the speed of rooting of leafy stem cuttings. Tree plantation being a key option to alleviate environmental challenges that the world is facing today, these results confirm previous findings which postulates that appropriate light management in stockplants can increase the production speed of required seedlings.
KeywordsNumber of cuttings Rooting percentage Shoot length Shade level Speed of rooting
Data collection and analysis were funded by the International Fund for Agricultural Development (IFAD, Grand ID IFAD 1098), the Belgium Development Cooperation and the CGIAR Research Program specifically Forests, Trees and Agroforestry (FTA) and Genebank.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Ambassa-Kiki R (2000) Caractérisation biophysique succincte des différentes zones agro-écologiques du Cameroun. IRAD—Yaoundé, p 6Google Scholar
- Atangana AR (2010) Phenotypic diversity in fruit and seed traits, and neutral genetic diversity in Allanblackia floribunda. Ph.D. thesis, University of LavalGoogle Scholar
- Attipoe L, van Andel A, Nyame SK (2006) The Novella project: developing a sustainable supply chain for Allanblackia oil. In: Ruben R, Slingerland M, Nijhoff H (eds) Agro-food chains and networks for development. Springer, Amsterdam, The Netherlands, pp 179–189Google Scholar
- Hoad SP, Leakey RRB (1996) Effects of pre-severance light quality on the vegetative propagation of Eucalyptus grandis. Cutting morphology, gas exchange and carbohydrate status during rooting. Trees 10:317–324Google Scholar
- Krajnc AU, Turinek M, Ivancic A (2013) Morphological and physiological changes during adventitious root formation as affected by auxin metabolism: stimulatory effect of auxin containing seaweed extract treatment. Agricultura 10:17–27Google Scholar
- Leakey RRB (1985) The capacity for vegetative propagation in trees. In: Cannell MGR, Jackson JE (eds) Attributes of trees as crop plants. Institute of Terrestrial Ecology, Abbots Ripton, Huntingdon, PE17 2LS, England, pp 110–133Google Scholar
- Leakey RRB (2001) Win-Win land use strategies for Africa: 2. Capturing economic and environment benefits with multistrata agroforests. Int For Rev 3:331–340Google Scholar
- Leakey RRB (2014) Plant cloning: macro-propagation. In: van Alfen N et al (eds) Encyclopedia of agriculture and food systems. Elsevier, vol 4, pp 349–359Google Scholar
- Letouzey R (1968) Etude Phytogéographique du Cemeroun. Lechevalier, ParisGoogle Scholar
- Orwa C, Munjuga M (2007) Allanblackia floribunda Oliv. In: van der Vossen HAM, Mkamilo GS (eds) Vegetable oils/Oléagineux. PROTA 14. http://www.prota4u.org/search.asp. Accessed 6 June 2013
- Tchoundjeu Z (1989) Vegetative propagation of the tropical hardwoods of Khaya ivorensis (A. Chef) and Lovoa trichilioides (Harm). Ph.D. thesis, University of EdinburghGoogle Scholar
- Thimijan RW, Royal DH (1982) Photometric, radiometric, and quantum light units of measure: a review of procedures for interconversion. HortScience 18:818–822Google Scholar
- World Agroforestry Centre (2011) Propagation of Allanblackia species. Progress Report, World Agroforestry Centre, p 12Google Scholar