Garcinia kola plays an important socioeconomic role in the Africa culture. Inspite of this, the plant only exists in the wild or as part of left over in the Agroforestry farms. Therefore, this research examined the phenology in seed germination for possible plantation establishment. G. kola seed dormancy and growth was investigated using hormone Napthalene Acetic Acid (NAA) and Benzene Amino Purine (BAP) application to induce quick germination and early growth The experiment was laid in a Completely Randomized Design (CRD) with seven treatments (0.5mg/ml BAP, 0.5mg/ml NAA, 1mg/ml BAP, 1mg/ml NAA, 2mg/ml BAP, 2mg/ml NAA and Control) in twenty replications. The results showed that Garcinia kola seeds germinated in seven weeks in IBA. Growth were assessed for 19wks and the result showed that Length of Radicle (LR) and Number of Radicle (NR) were significantly affected by the treatments, while 0.5mg/ml IBA gave the best result among the treatments. Length of Plumule, Number of Leaves and Collar diameter were not significantly affected by the treatments.Keywords: Garcinia kola, seed, hormone, dormancy, germination
Garcinia kola is found to be extinction-threatened due to over-exploitation and its regeneration has not been encouraged. This study investigated the influence of light intensities on the biomass accumulation of G. kola seedlings. Seedlings of G. kola were monitored under five light intensities namely; under forest canopy (5% light intensity), 25%, 50%, 75% light intensities and control treatment was direct sunlight (100% light intensity). The study was conducted in a Completely Randomized Design (CRD). Seedlings Leaf Dry Weight (LDW) under light intensities were not significantly affected (α=0.05) by different light intensities but significantly affect (α=0.05) the seedlings Stem Dry Weight (SDW), Root Dry Weight (RDW) and Total Dry Weight (TDW). Seedlings LDW ranged from 1.87 to 5.07 g, SDW ranged from 0.83 to 3.04 g, RDW ranged from 1.60 to 9.90 g and TDW ranged from 4.30 to 15.63 g respectively (after 24 weeks) depending on light intensity. The biomass accumulated by G. kola seedlings under 5 % light intensity was very low compared to the biomass accumulated by seedlings under other light conditions. Seedlings under 25%, 50% and 75% light intensities gave the highest biomass accumulation. This implies that G. kola preferred low light intensities for optimum biomass production.Keywords: Garcinia kola, Light intensity, Biomass accumulation, Propagation, Nursery Stage
This study investigated the effect of IBA on the sprouting and growth of Bambusa vulgaris cuttings. Forty (40) culm cuttings of two nodes per cutting were divided into four (4) batches with each batch containing ten (10) cuttings. Each batch was subjected to one hour (60min) soaking in Indole Butyric Acid (IBA) Treatment as follows; T1 soaked in 300ppm, T2 in 400ppm, T3 soaked in 500ppm and T4 was the Control (cuttings were not soaked in IBA). After the soaking operation, the cuttings were injected with 5ml of the same treatment used for each batch and were tapped to avoid leakage. The experiment was laid out in a Completely Randomized Design (CRD) with four treatments replicated. Data were collected weekly for 6weeks.The results revealed thatthe cuttings without the application of growth regulator performed better in terms of height and collar diameter compared to the cuttings that were treated with theregulator. Number of leaves and sprouts produced in all treatments were not significantly different from each other. Thus, it can be recommended that B. vulgaris can be vegetatively propagated without IBA application.Keywords: Bambusa vulgaris, Vegetative propagation, Plant growth regulator, Cuttings
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