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DocumentPropagation and growth from seeds and root segment cuttings of fruit tree-plus Diospyros mespiliformis (Ebenaceae) in Benin West Africa
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The aim of the present experiment was to assess effectiveness of selected propagation methods, early nursery and field performance of D. mespiliformis (Ebenaceae). For instance, effects of seed pretreatment/root segment cuttings diameter, provenance and soil types on germination and growth vigor of the species was investigated using 144 seeds/root segment; laid in 500 g of three different soil types and soaked/planted in polyethylene bags replicated four times in three treatments and laid in 4×3×3 factorial Completely Randomized Design. Emergence of radicle (days), Seedlings/Shoot Height (cm), number of leaves, and Percentage survival were recorded two weekly for a period of 7 months. Time to event seed germination/shooting data analysis, ANOVA two ways and Generalized Mixed effects Model were used to assess effects of origin, pre treatment/diameter and soil types on germination, shooting and growth of Diospyros mespiliformis. Results indicated that propagation of the species can best be done through seeds and root cuttings. The essay revealed that seeds from woodland, savannah and parkland, sowed in compost and clay and pre treated (boiled water, tegument removed) had the highest germination percentage (69.9-86.67 %), while seeds in the control (no treatment, Inundated Forest and sandy) had very low germination of 17-35 %. No seed treatment showed deficiency in the survival and germination of the seeds of Diospyros mespiliformis, while borehole water aided the survival and bring back early (rapid) germination. Regarding RSC, leafy shoots formed percentage varied from 0 % in river sand to 64.6% in clay and compost substrate after 12 weeks. Results reveal also that among the three classes of diameter, shooting height decreases from clay to sandy while the same variable move in inverse order regarding RSC origin. Keywords: Adaptive and integrated management, Biodiversity conservation, Genetic resources, Research, Sustainable forest management ID: 3477094 -
ArticlePromoting Terminalia brownii as a commercial indigenous tree species in drylands, East Africa
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Kenya’s forest cover is estimated at 7.4% of the land mass cover. Forests are important in ensuring biodiversity conservation and providing ecosystem goods and services, improving community livelihoods and national GDP. There is need to enhance afforestation and reforestation programmes to achieve the envisioned 10% tree cover target. However, this effort is constrained by climate change issues arising from unsustainable exploitation of wood for charcoal and firewood leading to the depletion of important tree species such as T. brownii. The domestication of T. brownii under agroforestry systems and other tree planting programmes are constrained by lack of adequate supply of superior and high quality seeds and seedlings, poor silvi-cultural management techniques, low rates of integration into smallholder agroforestry programs, limited knowledge on crop-tree interactions and lack of allometric models to estimate biomass yield and carbon stock. A multidisciplinary research project funded by the National Research Fund (NRF) is ongoing and is geared towards promoting the propagation and regeneration of T. brownii under agroforestry systems in the drylands of Kenya to mitigate climate change. A number of preliminary findings have been reported, such are; (1) Terminalia brownii fruits have mechanical dormancy imposed by the hard samara fruit and that extracted T. brownii seeds record a high percentage of above 80% under warm conditions; (2) germination of T. brownii fruits and seeds are significantly affected by fungal pathogens and insect pests; (3) five variables significantly influence the decision to domesticate T. brownii these are; education level of household head, importance of farm to the household income, access to credit, dependency ratio and intercropping; (4) studies on the spatial distribution and occurrence and development of allometric equation for estimating above and below-ground biomass of T. brownii in the drylands of Kenya are ongoing. Further assessment on growth performance have shown that T. brownii is generally fast growing; can attain an increase in height of (~1.0 m) and DGL (3.0 cm) annually, with significance difference in growth within and between provenances and that the it can withstand many other growth challenges despite the harsh weather conditions. These findings suggest that T. brownii is a promising tree species in agroforestry systems and afforestation in drylands and that there exist genetic variability among the available provenances thus the need to involve more stakeholders in seedling production and to embark on...... Key words: T. brownii, Commercial tree, growth performance, drylands of Kenya ID: 3623166 -
ArticleA checklist of vascular plants of Ewe-Adakplame Relic Forest in Benin, West Africa
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Covering 560.14 hectares in the south-east of Benin, the Ewe-Adakplame Relic Forest (EARF) is a micro-refugium that shows insular characteristics within the Dahomey Gap. It is probably one of the last rem-nants of tropical rain forest that would have survived the late Holocene dry period. Based on intensive field investigations through 25 plots (10 × 50 m size) and matching of herbarium specimens, a checklist of 185 species of vascular plant belonging to 54 families and 142 genera is presented for this forest. In ad-dition to the name for each taxon, we described the life form following Raunkiaer’s definitions, chorology as well as threats to habitat. The Rubiaceae family was the richest (20 species) followed by the Fabaceae (15 species). Life forms showed the preponderance of phanerophytes (88%). The Chorological spectrum was dominated by Guineo-Congolean species (66%). Species richness estimated were 200.52 ± 9.2808 for Bootstrap; 217.62 ± 14.5972; 224.16 ± 15.3725 and 242.67 respectively for Chao, Jacknife1 and Jacknife2. Bootstrap appears to be the estimation closer to the field records. In Benin, EARF is home for Rinorea species described as West African forest bio-indicators and single location for Nesogordonia papa-verifera, Mansonia altissima, Englerophytum oblanceolatum, Octolobus spectabilis, Vitex micrantha and most of Drypeteae tribe species (Drypetes aframensis, Drypetes afzelii, Drypetes gilgiana and Drypetes leonensis) recorded in Benin. Our results provides baseline information for further in-depth analysis of vegetation history in Benin by raising the question on the past floristic connection of the Dahomey gap and com-munity engagement in conservation. ID: 3469431
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