FACULTY OF AGRICULTURE

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Subject: search.filters.subject.Biodiversity

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    Determinants of on-farm cassava biodiversity in Ogun State, Nigeria
    (Taylor & Francis, 2015) Obayelu, O.A.; Akintundea, O.O.; Obayelu, A.E.
    Global food security depends on agro-biodiversity. However, an enormous quantum of genetic diversity of agricultural crops has been lost over the last century, and this implies vulnerability, increased economic risks, reduced food security, loss of resources for future adaptation as well as reduced and unsustainable agricultural growth opportunities. This study examined the determinants of on-farm cassava biodiversity in Ogun State, Nigeria. We profiled cassava biodiversity indices of farmers in the state according to Margalef, Shannon and Simpson diversity indices, and identified factors influencing cassava biodiversity. Data collected from 160 cassava farming households using a multistage sampling procedure were analyzed with descriptive statistics, Poisson regression and Tobit regression models. Farmers’ experience had a positive relationship with their on-farm cassava biodiversity (p < 0.1). The arable land size controlled by the farmer was positively related to Margalef (p < 0.01), Shannon (p < 0.05) and Simpson (p < 0.01) indices. However, the land squared variable was negatively related to Margalef (p < 0.01), Shannon (p < 0.05) and Simpson (p < 0.01) indices. It was recommended that appropriate agricultural land reforms should be incorporated into the agricultural transformation agenda as a key to fostering on-farm cassava biodiversity.
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    Biodiversity and ethnobotanical potentials of plant species of University of Agriculture Makurdi Wildlife Park and Ikwe Games Reserve, Benue State, Nigeria
    (International Formulae Group, 2009) Jimoh, S. O.; Debisi, L. A. A.; Ikyaagba, E. T.
    Plant biodiversity and ethnobotanical potentials of University of Agriculture Makurdi (UAM) Wildlife Park and Ikwe Games Reserve, Benue State, Nigeria, were investigated in this study. Floristic survey was conducted in the two reserves using stratified sampling technique based on the three identified microhabitats in each of the reserves. Nine plots measuring 25 m x 25 m were laid in each of the reserves to survey trees and shrubs with diameters at breast height (dbh) 5 cm and above. Within each plot, 5 sub-plots of 1 m × 1 m were established to assess plants below 5 cm dbh. Participatory ethnobotany and interview were used for the ethnobotanical survey. Seventy-one valuable species belonging to 39 families were identified. Ninety-three percent of these have more than one use; categories with medicinal uses topping the list (48%). Other uses include: wood (35%) and food (17%). Harvesting techniques in many of the species were intensive and destructive. It is suggested that harvesting of plant products in these reserves be controlled through monitoring and enlightenment.