Comparative Evaluation of the Morphological Aspects and the Nutritional Values of Urera trinervis and Gnetum africanum in Wild Medium and Domestic Medium

摘要

This study concerns the evaluation morphological and nutritional of two wild vegetable-sheets domesticated by the northern population of the districts of Brazzaville, in particular Urera trinervis and Gnetum africanum . A physical analysis was made on the morphological aspects of the sheets of the two plants according to the zone of harvest and the chemical analyses relate to the content of dry matter, proteins, lipids, glucids, ashes et mineral elements. The results show that the sheets of domestic Urera trinervis are broader than those of wild Urera trinervis (p Urera trinervis (p 0.05). The Sheets of wild Gnetum africanum are broader than the sheets of domestic Gnetum africanum (p 0.05). Being nutritional quality, the results show that the contents of proteins of the sheets of Urera trinervis wild and domestic presents no difference significant (p>0.05), 15.06±0.36/100 g of dry matter for Urera trinervis wild and 14.50±0.25 g/100 g of matter dry for Urera trinervis domesticated. The contents of proteins of Gnetum africanum are of 20.80±0.2/100 g of mS for the wild sample and 19.03±0.22 g 100 g dry matter for domesticated sample (p Urera trinervis and 950±00.00 mg; 1680±00.00 g and 29±00.00 mg/100 g of dry matter for Gnetum africanum . The domestication of Urera trinervis and Gnetum africanum does not modify in a significant way nutritional qualities of studied vegetables. These results appear adapted to promote and integrate certain wild vegetables in agrarian truths systems in order to fight against their disappearance and to contribute to the food safety of the populations.