Comparison of Nutritional and Anti-Nutritional Qualities of Grewia forbesii Hav. Ex Mast and Grewia bicolor Juss Fruits from Kitapilimwa Forest Reserve in Iringa District

Authors

  • Vendeline E. Tairo Department of Biological Sciences, Mkwawa University College of Education, University of Dar es Salaam, P. O. Box 2513, Iringa, Tanzania.

DOI:

https://doi.org/10.4314/tjs.v47i4.9

Keywords:

Proximate analysis, mineral nutrients, anti-nutritional qualities, Grewia species, Kitapilimwa Forest Reserve

Abstract

The Grewia forbesii and Grewia bicolor fruits were collected from Kitapilimwa Forest Reserve and were analysed for proximate, nutrients and anti-nutrients compositions. Results showed low moisture contents in G. forbesii and G. bicolor amounting to 14.14 and 13.98 percent, respectively. Crude fibre percent was slightly higher in G. bicolor (33.15%) than G. forbesii (31.95%). Lipid content was slightly higher in G. bicolor (1.37%) compared to G. forbesii (1.28%). The crude protein content of G. forbesii (7.44%) was slightly higher than G. bicolor (7.00%). Total carbohydrate content of G. forbesii (68.9%) was higher than that of G. bicolor (70%). Mineral analysis indicated substantial amounts of potassium 898 mg/100 g in G. forbesii and 879 mg/100 g in Gbicolor. Calcium content was high in G. forbesii and G. bicolor amounting to 453 mg/100 g and 582 mg/100 g, respectively. Iron was high in both species (20.73–24.45 mg/100 g). Manganese, copper and zinc were substantially low. The results revealed low levels of tannin (< 1.7%) and phylates (< 0.3%). The presence of substantial amounts of nutrients and low anti-nutrients revealed that the studied species may be potential sources of nutritional food.

Keywords: Proximate analysis, mineral nutrients, anti-nutritional qualities, Grewia species, Kitapilimwa Forest Reserve

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Published

28-10-2021

How to Cite

Tairo, V. E. . (2021). Comparison of Nutritional and Anti-Nutritional Qualities of Grewia forbesii Hav. Ex Mast and Grewia bicolor Juss Fruits from Kitapilimwa Forest Reserve in Iringa District. Tanzania Journal of Science, 47(4), 1436–1441. https://doi.org/10.4314/tjs.v47i4.9

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