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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 -
ArticlePrioritization of indigenous fruit trees/shrubs for domestication in northern Guinea savanna, Taraba State, Nigeria
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Indigenous fruit trees/shrubs are essential biological resources in many agroecological systems globally, including Nigeria. They are essential for household nutrition, food security, poverty alleviation, and ecosystems sustenance. Despite their numerous potentials in rural households, food security, income, and ecological attributes, many remain in the wild state with little domestication efforts, limiting their economic potentials. The study was carried out to prioritized indigenous fruit trees/shrubs in the region. Semi-structured questionnaires and focus group discussions were used for the data collection on the existing trees/shrubs species, while prioritization was based on certain variables (farmers' preference and roles in economy). Findings indicated that 27 edible fruit-bearing species were identified, 67% were trees, and 33% were shrubs. The plant species belonged to 19 taxonomic families with Fabaceae being dominant. Individually, farmers' priority species based on food value, income potentials, medicinal values, and food security benefits were; Parkia biglobosa, Vitellaria paradoxa, Prosopis africana, Vitex doniana, and Adansonia digitata. The need to step up provenance evaluations and domestication efforts for future agroforestry and plantations establishment implied in the study. Keywords: Domestication, Cultivars, Germplasm, Prioritized, Savanna, Agroforestry ID: 3478035 -
DocumentPatula pine (Pinus patula) cones opening under different treatments for rapid seed extraction in Londiani, Kenya
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Seed extraction from pines is challenging to the forestry sector globally. This is usually contributed by the pine cone anatomy that opens through a function of temperature and humidity which varies widely in the pine growing regions of the world and the Pinus species as observed in previous works done on Pinus roxburghii, Pinus halepensis, Pinus wallichiana, Pinus pinaster, Pinus radiata, and Pinus sylvestris. This study sought to reduce the extraction time and improve the extraction efficiency of Pinus patula seed in Kenya. The experimental design used was two factorial design with replicates of twenty cones randomly picked per treatment. Data analysis was analyzed through ANOVA with a Pvalue of 0.05. We present evidence that soaking does not influence the opening of cones and seed yield for the optimum temperature which the study determined to be 65°C. We also present evidence that, for rapid seed extraction, the temperature 65°C with an exposure period of between 4 and 24 h is significantly effective. This study presents a new understanding of rapid seed extraction, which contributes to one of the Kenya Forestry Research Institute’s strategic objectives of generating technologies for enhanced production of superior germplasm for priority tree species. Keyword: Research ID: 3469689
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