Physicochemical Properties of Un-parboiled Oryza Species Cultivated in Igbemo-Ekiti, Ekiti State, Nigeria

Abstract

The amounts of carbohydrate, protein, crude fat, crude fiber, ash, and mineral elements (Calcium, Magnesium, Iron, Potassium, Sodium, and Zinc) in two kinds of rice grown in Igbemo-Ekiti, Ekiti State, were determined in this study. Using Gc-Ms spectrometric analysis, the fatty acids contained in the oil of Oryza sativa and Oryza glaberrima were identified. On a dry weight basis, the estimated carbohydrate content of rice samples ranged from 71.41 ± 0.37 to 74.02 ± 0.35 %, with no significant difference in carbohydrate content amongst the examined species, with Oryza glaberrima having the highest carbohydrate content. Protein levels ranged from 7.06 ±0.35 to 7.11 ± 0.20 %, with Oryza sativa having the highest protein content. The crude fat levels in the tubers ranged from 6.26 ± 0.04 to 7.18 ±0.17 %, with Oryza sativa having the highest level. The crude fiber content ranged from 3.02 ±0.32 to 3.77± 0.38 %, with Oryza sativa having the highest level and the ash content ranging from 0.51± 0.07 to 0.92± 0.32 %. Calcium, sodium, and potassium concentrations were all fairly high in both species. The Gc-Ms chromatogram indicated a wide range of bioactive chemicals, the majority of which were fatty acids. Linolenic acid, Arachidic acid, Palmitic acid, palmitoleic acid, Myristoleic acid, and Capric acids were some of the primary chemical components detected in the Oryza sativa chromatogram, however monounsaturated and polyunsaturated fatty acids were found in lesser amounts. Linoleic acid, oleic acid, palmitoleic acid, Myristoleic acid, Elaidic acid, Linolelaidic acid, stearic acid, and Behenic acid have been discovered in Oryza glaberrima, making them more favorable in nutrition and diet. The two Oryza types were found to be high in fatty acids, protein, and mineral content.