Proximate and Mineral Composition of Seed and Tuber of African Yam Bean, Sphenostylis Stenocarpa (Hoechst. Ex. A. Rich.) Harms
Abstract
The compositional analyses of the seed and tuber of African yam bean were carried out and their constituents compared. There were highly significant differences (P< 0.001) between the crude protein, ash, nitrogen-free extract, and crude fibre and carbohydrate fractions of the seed in the five accessions of African yam bean. Fat (ether extract) and moisture content fractions of the seed did not differ significantly (P>0.05) between the five accessions. The yam bean tuber was composed mainly of carbohydrate (79.24%). The other constituents of the tuber showed low percentages except nitrogen-free extract (71.18%) that was more than those found in the seed. Both the seed and tuber of African yam bean had higher levels of carbohydrate than crude protein. The use of paired T-test showed that both the seed and tuber of African yam bean did not differ significantly (P>0.05) in the composition of their mineral contents.
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