IDENTIFICATION, CONSUMPTION PATTERN AND NUTRIENT COMPOSITION OF PROCESSED GREEN LEAFY VEGETABLES AND THEIR YAM DISHES

By

Author

Presented To

Department of Agriculture

Ugbogulu, ( Curcubita pepo), ariraa. ( Corchorus trideus tiliaceae) eliemionu. (Celosia
argentea), ugu oyibo. (Jatropha aconitisolia), okpa okuku (Uvarae chamae) and abuba
ji nwannu ( Ipomoea batatas) were identified by Igbo-ukwu women as wild and
cultivated edible vegetables. Both parents and grandparents form major sources of
information about cultivation, harvesting, processing, preparation and utilization of
yam dishes based on these vegetables. These vegetable are on the verge of extinction
due to poor nutrition education, migration of youths and young adults, seasonality,
change in lifestyles, nutrition transition and food habits. Sun and shade drying
increased many nutrients such as protein from 10.70 to 19.40%. These processes also
increased some micronutrients. Iodine, copper, and calcuium increased from traces to
5.08 and 4.43mg; 0.2 to 2.4 and 1.7mg; from 0.2 to 11.5 and 22.00mg, respectively.
These processes increased phytate, oxalate, tannins and saponins from 0.00mg to
125.58 and 116.5mg; traces to 135.50mg and 112.3mg; traces to 0.15 and 0.16mg and
from traces to 0.05 and 0.05mg, respectively.


The yam dishes prepared with fresh, sun and shade dried, as well as pulverized
vegetables had increased protein from 5.4 in A-102 –yam dish prepared with sun dried
ugu oyibo to 12.6% in A-101 –yam dish prepared with shade dried and ash from 4.6 in
in A-103- yam dish prepared with shade dried okpa okuko to 9.50% in A-105-yam
dish prepared with fresh sweet potato.. These dishes had traces of phytate, oxalate,
tannins and saponins. However, dish prepared with sun dried ugu oyibo leaves had
increases in phytate oxalate, tannins and saponins and food toxicants from (traces to
1.21,4.34,16.6 and 14.5g, respectively).
Iron, zinc, copper and calcium in these dishes increased. Iron increased from 3.5 to
33.5mg, zinc from traces to 4.2mg, copper from traces mg to 1.4mg and calcium from
2.00 to 25.50mg, respectively. The dishes prepared with fermented oil bean seeds, fresh
okpa okuku leaves and fresh sweet potato leaves had increases in beta-carotene that
ranged from traces to 52.00, 25.3 and 24.9mg each.
The dishes prepared with fresh sweet potato leaves and that prepared with fresh ugu
oyibo leaves had the best organoleptic attributes and general acceptability. (7.5 and 7.3,
respectively).

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