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Title: Domestication of multipurpose tropical plants, with particular reference to Irvingia gabonensis Baill., Ricinodendron heudelotii (Baill.) Pierre et Pax and Gnetum africanum Welw
Author: Shiembo, Patrick Nde
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1994
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The tropical forests of Cameroon contain a wealth of multi-purpose plants from which a range of goods and services is derived, mostly by rural populations. The forests are currently under the pressure of exploitation for timber and other forms of economic development. To counter the effects of deforestation, this study was aimed at the domestication of three species for use in farming systems by rural people. These species, Ricinodendron heudelotii, Irvingia gabonensis and Gnetum africanum, were selected on the basis of their economic importance in south-west Cameroon. Six non-mist propagators were built in the Forestry Research Station at Kumba, Cameroon. Stockplants were derived from cuttings and seedlings obtained from selected trees. Thirteen experiments were completed investigating the effects of applied auxin, leaf area and rooting media on the rooting of leafy stem cuttings of each of the three species. Additional experiments investigated the effects of fertiliser addition, shading and pollard height on stockplants of Ricinodendron heudelotii. Results indicated that optimal rooting percentages of Ricinodendron heudelotii cuttings were obtained when treated with 40 μg IBA, inserted in sawdust, and with a leaf area above 80 cm2. Similarly, optimum treatments for rooting of the cuttings of Irvingia gabonensis were defined as 200 μg IBA, inserted in sawdust, and with a leaf area above 80cm2, and those for Gnetum africanum were 250 μg IBA, inserted in sawdust, and with a leaf area above 80 cm2. In the nursery stump height experiment, rooting of Ricinodendron heudelotii was found to decrease with increasing height, with an optimum height of 0.3 m.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available