Proximate Analysis and Phytochemicals of Sorghum (Sorghum bicolor) Plant Bark
Olubiyi, E. O.; Ukozor, A. U. C. and Monday, A. I.
Journal Title:Journal of Environmental Issues and Agriculture in Developing Countries
This experiment assesses the food value of the bark of sorghum (Sorghum bicolor) (Guinea corn) by determining the nutrient composition, some anti-nutritional factors and its contributions to nutrient intake of its consumers. Samples of sorghum plant bark were obtained, cut into bits, sun-dried for 7 days and milled
into powder. The nutrient composition proximate, minerals and vitamin A, and its anti-nutritional factors were determined using standard methods. The results of the proximate analysis reveal that the dried bark contains 18.07g carbohydrate, 4.31g crude protein, 3.439 crude fat, 53.30g crude fibre and 6.18g ash/100g dry sample. Mineral contents of the sample show 17.61mg/g calcium, 3.52mg/g magnesium and 0.002mg/g Iron. The vitamin A value was found to be 2880 IU (288 μg RE). The results of the anti-nutritional factors show that it contains 21.38g Saponin, 2.16mg cyanide, 1.50g oxalate, 0.70g alkaloid, 1.02g Tanin and 2.0g flavonoids (primary anti-oxidant)/100g sample. The results of this work revealed that the bark of sorghum plant can provide a substantial amount of fibre while supplying about 38.4% of pro-vitamin A (â– carotene) of dietary reference intakes (DRI) of individuals. It is however recommended that application of suitable processing technology can reduce the high levels of antinutritional factors observed in the sample to safe residual levels so as to permit its consumption as a fibre (insoluble) supplement.