Monitoring the Effect of Variegated Forest Soil Amendments on the Germination and Early Growth of Irvingia gabonensis (O Rorke, Baill)

Under organically primed and thermally amended soil media, the early germination and growth variables of Irvingia gabonensis were investigated. To compare to a control topsoil, six media were made from Gmelina plantation topsoil by amending it with poultry waste (T2), river sand (T3), and combusted forest floor litters for 5 (T4), 10 (T5), 15 (T6), and 20 (T7) minutes, respectively (T1). The germination and early growth trial of Irvingia was repeated three times and arranged in a fully randomised design after soil media were tested for essential nutrient properties. ANOVA was used to evaluate the data, and the Duncan multiple range test was used to distinguish significant means. T3 had the highest Ca/Mg ratio, T7 had the lowest CEC (13.2 meq/100 g soil), and T1 and T2 had slightly acidic pH (H2O), while T3, T4, T6, and T7 were alkaline. T4 (100%) > T1=T2=T5 (85.71%) > T3 (71.43%) > T6 (42.86%) > T7 (42.86%) Germination at 6 WAS was T4 (100%) > T1=T2=T5 (85.71%) > T3 (71.43%) > T6 (42.86%) > T7 (42.86%) (0 percent ). The collar diameter (4.50×10-1 0.05 mm) and leaf area (35.084.85 mm2) of seedlings differed substantially (P0.05), with T3 and T4 contrasting favourably in collar diameter (4.50×10-1 0.05 mm) and leaf area (35.084.85 mm2), despite T3 having the highest stem height (117.790.42 mm). For quick germination, the study recommends using least thermally adjusted media (T4) and primed topsoil-river-sand (T3) over traditional topsoil (T1) in order to conserve food reserves for I. gabonensis’ crucial early growth cycle in the pursuit of domestication in nutrient-depleted soils. As a result, at the nursery and plantation establishment stages, a mixture of these inexpensive and readily available amendments can be used to domesticate this near-threatened and economically valuable forest tree species.

Author (s) Details

Dr. A. E. Egwunatum
Department of Forestry and Wildlife, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

D. E. Dolor
Department of Agronomy, Forestry and Wildlife, Delta State University, Abraka, Delta State, Nigeria.

C. J. Ofobike
Department of Forestry and Wildlife, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.

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