Potentials of bioremediations of palm oil mill effluent: Effects on growth and yield parameters of maize plant (Zea mays L.)
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Abstract
This greenhouse study was conducted in the Greenhouse of the Department of Applied Biology, Ebonyi State University, Abakaliki, to evaluate the effect of palm oil mill effluent (POME) on the shoot fresh weight, shoot dry weight, root fresh weight and root dry weight of maize plant (Zea mays). POME is produced in large quantity in Nigeria and its disposal is a major concern among palm producing industries; and maize is known to be one of the world’s most important crop plants. The growth and development of maize plants with treatment of various quantities of POME (25 ml, 50 ml, 75 ml and 100 ml) were investigate and studied using a randomized complete block design (RCBD). A total of 100 maize seeds (four seeds per replicate) were sown and raised in 10 cm in diameter with a volume of 644 ml sterilized container prepared with cotton wool and irrigated every third day for 12 days with different quantities of POME ranging from 0 ml, 25 ml, 50 ml, 75 ml to 100 ml which represents the following treatment groups; T1, T2, T3, T4 and T5 respectively that were each replicated 5 times (R1, R2, R3, R4 and R5). T1 is the control group and was irrigated with distilled water. Germination percentage data of the treatment groups were taken every 24 hours and the seedling harvested after 20 days post-planting. The shoot and root fresh and dry weight were taken and recorded. Percentage germination of the treatment groups were subjected to a one-way ANOVA which indicated that a significant differences (F(3,20) = 28.013, p = 0.001) exist between different groups. The shoot fresh weight and shoot dry weight decreased from 0.97 g to 0.42 g and 0.63 g to 0.21 g respectively with increased quantity of POME treatment. However, maximum (0.68 g) root fresh weight was in recorded in T1 and least (0.47 g) in T3. Results indicated that highest (0.37 g) root dry weight was also recorded in T2 but unlike root fresh weight, least (0.26) root dry weight was obtained in T5. The study revealed that at lower concentrations, POME showed a favourable effect on the parameters measured; but at higher concentrations, inhibitory effects on development of maize were observable.
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References
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