DEPARTMENT OF FOREST RESOURCES MANAGEMENT

Permanent URI for this communityhttps://repository.ui.edu.ng/handle/123456789/457

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Start date: 1990End date: 1999

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    Variations in Fruit and Seed Characteristics and Germination of Tetrapleura Tetraptera (Schum & Thonn.) Taub. From Different Sources in South - Western Nigeria.
    (1999) Jimoh, S.O.; Okali, D.U.U.
    "An assessment was carried out of variability in fruit and seed characteristics and the effects of seed source and seed size on germination of Tetrapleura tetraptera from four sources in South-Western Nigeria. The sources were Emure-Ekiti (Lat. 7°26’N and Long. 5°30’E); Ikoyi-Ue (Lat. 8°15’N and Long. 4°49’E); Osogbo (Lat. 7° 46’ and Long 4°35’E) and Sapele (Lat. 5°55’N and Long. 5°46’E). Fruit length and diameter were determined using a string and a metre-ruler, while fruit and seed weights were measured with an electronic balance and the number of seeds per pod was counted. Seeds were categorised into two, based on sources and size classes for germination studies. Seed dormancy was broken using concentrated Tetra-oxo-sulphate VI acid. The seeds were thoroughly washed in distilled water before sowing in germination boxes filled with top soil.Significant variations were observed both in fruit and seed characteristics and in germination. Mean pod length ranged from 21,60cm to 24.39cm with coefficient of variation of 5.90%. Pod diameter ranged from 3.95cm to 7.5cm with 6.9% coefficient of variation. Mean pod weight ranged from 34.94g to 57.46g with coefficient of variation of 11.11%. The number of seeds per pod varied between 10.46 and 14.04 with coefficient of variation of 14.92%. Seed length varied between 9.12 and 9.78mm with coefficient of variation of 2.58%, while seed diameter and seed weight ranged from 6.26mm to 7.00mm and 1.50g to 1.76g respectively. The coefficient of variation for seed diameter was 7.05% while that of seed weight was 6.91%. Germination pattern also varied according to seed size classes and sources. The largest size class (10.7mm+) gave the highest cummulative germination percentage of 88.2% and a germination rate of 12.52 seeds per day. The size class 6.0 - 7.5mm gave the lowest cummulative germination percentage of 57.5% and a germination rate of 8.19 seeds per day. Seeds from Ikoyi-Ile had a total germination percentage of 92.8% and a germination rate of 12 seeds per day. The lowest total germination of 56.6% was recorded for Osogbo. Interaction effects between mother trees and seed source were significant. There was, however, no significant interaction between seed size and seed source"
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    Gender role in the management, consumption and utilization of non-timber forest products (NTFPs) – a case study of Gambari Foerst Reserve, Oyo State
    (Forestry Association of Nigeria, 1999) Azeez, I. O; Aiyedun, O. J
    Presently in many countries of the world, rural women are still the caretakers and users of forests. They have a vital role in environmental management and development. Their full participation is therefore essential to achieve sustainable management. This paper investigated the role of gender in achieving sustainable management, conservation and utilization of Non-Timber Forest Products (NTFPs) with emphasis on leaves, leafy vegetables, firewood, snails and medicinal plants. The study was carried out at Gambari Forest Reserve and Settlements surrounding the reserve viz Onigambari, Onipe, Olonde and Manu. Three sets of questionnaires were used for the study - one each for Extractors, Utilizers, and Forests management personnel. A total number of 180 questionnaires were administered to randomly selected respondents while 176 were returned. 41% of the questionnaires retuned were from utilizers, 29.4% from extractors while 27% were from the personnel involved in the management of the reserve. The study revealed that although management, conservation, utilization and collection o f NTFPs the reserve are not sex specific, a preferential treatment for men is obvious. This is more pronounced in the technical aspects of management, conservation and sustainable development planning.
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    Effects of process variables on the strength properties of veneer laminated cement bonded particle board from mixed tropical hardwoods
    (1999) Omole, A. O.; Badejo, S. O. O.
    Modulus of Rupture (MOR) and Modulus of Elasticity (MOE) of veneer laminated wood cement panel were evaluated. The boards were made of 3 layers comprising 1.5 mm thick mixed hardwoods sawdust for the two surfaces, and 9mm thick core layer made of plantation grown Gmelina arboma flakes. Three variables were investigated namely: Density at three levels (1000 kg/m3, 1100kg/m3 and 1200 kg/m3), Cement wood ratios of 2.5:1.0, 2.75:1.0 and 3.0:1.0 and glue spread of 1.02 kg/m2, 1.43 kg/m2 and 1,74 kg/m2 double due line (DGL) for the boards lamination. For all the treatment combinations, the MOR ranged from 26.79 N/mm to 42.59 N/mm2 while for MOE, the mean value was in the range of 3114N/mm2 to 5310N/mm2. At board density level of 1250 kg/m3 the laminated panels gave value of the highest MOR and MOE. Statistical analysis showed that the three variables considered in this study had significant on the board strength.
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    A preliminary evaluation of the flexural properties of wood veneer laminated cement-bonded particleboard from tropical hardwood species
    (Dehra Dun, U.P. : Timber Development Association of India, 1995-07) Oyagade, A. O.; Badejo, S. O. O.; Omole, O. A.
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    Senna siamea (LAM) and its potential for protective forestry
    (1999) Oluwadare, A. O.; Omole, A. O.
    There is problem of desertification worldwide. It is most prevailing in the northern part of Nigeria where the scanty vegetation cover is being destroyed daily for firewood. Firewood problem has been identified as one of problems contributing to land degradation. There is need to plant suitable species with good calorific (fuel) value which in turn will improve the soil as well as ameliorate the encroachment of desert. Senna siemea wood samples were collected from the University of Ibadan plantation. The fuel value was determined using ballistic bomb calorimeter. Twenty trees of the same age were assessed. The mean fuel value for wood and bark were 22275kj/kg and 20961kj/kg respectively. The highest radial value was found near the pith with mean value of 23312.47kj/kg and the least toward the bark (21299. 26kj/kg). Mean tree height and diameter at breast height were 14.20m and 21.68cm respectively. Based on this performance, Senna siamea is being proposed as a suitable species for reforestation, protective forestry in soil conservation, reclaiming denuded areas and for firewood plantation.