Extraction and Determination of the Concentration of Seven Water Soluble Vitamins Present in Seven Accessions of Dioscorea, Bulbifera Planted in Different Soil Treatments

The experiment on the extraction and determination of seven water soluble vitamins present in seven accessions of Dioscorea bulbifera was carried out at the research farm of University of Port Harcourt Rivers state Nigeria. It was laid out in a randomized complete block design (RCBD). Various treatments (Ashes amended with sandy soil (AS), Sawdust amended with sandy soil (SAW), sandy soil (SD), and garden soil as control (CNT) were used with seven accessions of Dioscorea bulbifera which includes; accession 3079, 3083, 3084, 3087, 3089, 3094 and 4121 were planted on each of the treatments for 8 weeks. Data was obtained by analyzing the leaves, the results shows that across the treatment level, all the seven water soluble Vitamins studied is found to be present in Dioscorea bulbifera and highest in the sandy soil (SD) treatment and in accession 3083 only when compared with the control (CNT). This was also replicated in all the vitamins as prove that the control (CNT) and sandy soil (SD) treatment is the best soil for planting Dioscorea bulbifera for optimum water soluble vitamin production. This study has also proved that there is significant amount of water soluble vitamins present in Dioscorea bulbifera and we can proudly say that a farmer should plant Dioscorea bulbifera in normal soil or sandy soil for optimum vitamins C, B1, B2, B3, B6, B9, B12, production and it is now true that all the accessions of Discorea bulbifera can grow well with high yield if planted on the right soil with good treatment.