[ EVALUATION DES TENEURS DE QUELQUES PARAMETRES CHIMIQUES SUR LA QUALITE NUTRITIVE DE Ipomoea batatas (PATATE DOUCE) ET Zea mays (MAÏS) CULTIVEES DANS LES ZONES HUMIDES DES RIVIERES KAMBO ET LONGMAYAGUI (DOUALA) ]
Volume 33, Issue 1, October 2017, Pages 56–69
Marie Louise BA’ANA ETOUNDI1, Gildas Parfait NDJOUONDO2, Roland Didier NWAMO3, Henri FANKEM4, and Siegfried Didier DIBONG5
1 Département de Géographie, Faculté des Lettres et Sciences Humaines, Université de Douala, B.P. 3132 Douala, Cameroon
2 Département de Biologie des Organismes Végétaux, Faculté des Sciences, Université de Douala, B.P. 24157 Douala, Cameroon
3 Département d’Aquaculture, Institut des Sciences Halieutiques, Université de Douala, B.P. 2701 Douala, Cameroon
4 Département de Biologie des Organismes Végétaux, Faculté des Sciences, Université de Douala, B.P. 24157 Douala, Cameroon
5 Département de Biologie des Organismes Végétaux, Faculté des Sciences, Université de Douala, B.P. 24157 Douala, Cameroon
Original language: French
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Toxic metals have a polluting with toxic to living organisms even at low concentrations. The overall objective of the study is to determine the impact of some pollutants on the nutritional quality of corn (Zea mays) and potato (Ipomoea batatas) grown mainly in wetlands of Kambo and Longmayagui rivers. Nitrates, phosphates, cadmium and lead were measured in water and in different corn and potato organs grown in the swampy fields Yassa and Arir with 3 repetitions, respectively. The results obtained show that plants produce fields have chlorosis and necrosis and a yellowing of the leaves. Potato tubers rot and show clearly are not consumables. Ears of corn obtained are big but have some spaced seeds. The cadmium content is high in corn seeds 0.10 ± 0.02 mg/kg dry matter and corn tuber 0.08 ± 0.09 mg/kg of dry matter. This content is greater than the tolerance in humans from 0.005 mg/kg dry matter. The lead content is high in the potato tuber 35.00 ± 0.03 mg/kg dry matter and corn 17.00 ± 0.00 mg/kg dry matter. These lead levels are high the threshold of tolerance in different organs of these plants to the standard of 0.05 mg/kg of dry matter. The nitrate and phosphate are higher in potato roots and corn stalks in relation to other organs. The finding of very advanced level of degradation of wetlands Douala directly affecting the nutritional quality of crops shows that it would be desirable that people and governments aware of the pollution on health over the poor quality of products consumer cultures of these lowlands.
Author Keywords: Toxic metals, potato, corn, wetlands, Kambo, Longmayagui.
Volume 33, Issue 1, October 2017, Pages 56–69
Marie Louise BA’ANA ETOUNDI1, Gildas Parfait NDJOUONDO2, Roland Didier NWAMO3, Henri FANKEM4, and Siegfried Didier DIBONG5
1 Département de Géographie, Faculté des Lettres et Sciences Humaines, Université de Douala, B.P. 3132 Douala, Cameroon
2 Département de Biologie des Organismes Végétaux, Faculté des Sciences, Université de Douala, B.P. 24157 Douala, Cameroon
3 Département d’Aquaculture, Institut des Sciences Halieutiques, Université de Douala, B.P. 2701 Douala, Cameroon
4 Département de Biologie des Organismes Végétaux, Faculté des Sciences, Université de Douala, B.P. 24157 Douala, Cameroon
5 Département de Biologie des Organismes Végétaux, Faculté des Sciences, Université de Douala, B.P. 24157 Douala, Cameroon
Original language: French
Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Toxic metals have a polluting with toxic to living organisms even at low concentrations. The overall objective of the study is to determine the impact of some pollutants on the nutritional quality of corn (Zea mays) and potato (Ipomoea batatas) grown mainly in wetlands of Kambo and Longmayagui rivers. Nitrates, phosphates, cadmium and lead were measured in water and in different corn and potato organs grown in the swampy fields Yassa and Arir with 3 repetitions, respectively. The results obtained show that plants produce fields have chlorosis and necrosis and a yellowing of the leaves. Potato tubers rot and show clearly are not consumables. Ears of corn obtained are big but have some spaced seeds. The cadmium content is high in corn seeds 0.10 ± 0.02 mg/kg dry matter and corn tuber 0.08 ± 0.09 mg/kg of dry matter. This content is greater than the tolerance in humans from 0.005 mg/kg dry matter. The lead content is high in the potato tuber 35.00 ± 0.03 mg/kg dry matter and corn 17.00 ± 0.00 mg/kg dry matter. These lead levels are high the threshold of tolerance in different organs of these plants to the standard of 0.05 mg/kg of dry matter. The nitrate and phosphate are higher in potato roots and corn stalks in relation to other organs. The finding of very advanced level of degradation of wetlands Douala directly affecting the nutritional quality of crops shows that it would be desirable that people and governments aware of the pollution on health over the poor quality of products consumer cultures of these lowlands.
Author Keywords: Toxic metals, potato, corn, wetlands, Kambo, Longmayagui.
Abstract: (french)
Les métaux toxiques ont un caractère polluant avec des effets toxiques pour les organismes vivants même à de faibles concentrations. L’objectif général de l’étude est de déterminer l’impact de certains polluants sur la qualité nutritive du maïs (Zea mays) et de la patate (Ipomoea batatas) cultivés majoritairement dans les zones humides des rivières Kambo et Longmayagui. Les nitrates, phosphate, cadmium et plomb ont été mesurés dans l’eau et dans les différents organes de maïs et de patate cultivés dans les champs marécageux à Yassa et Arir respectivement avec 3 répétitions. Les résultats obtenus montrent que les plantes des champs de culture présentent des chloroses et des nécroses ainsi qu’un jaunissement des feuilles. Les tubercules de patate montrent des pourritures et ne sont visiblement pas consommables. Les épis de maïs obtenus sont gros mais présentent quelques graines espacées. Les teneurs sont au-delà du seuil de toxicité en cadmium chez l’homme (norme ≤ 0,005 mg/kg) de 0,1 ± 0,02 mg/kg dans les graines de maïs et 0,08 ± 0,09 mg/kg dans le tubercule de patate. Les teneurs en plomb sont au-delà du seuil de toxicité chez l’homme (norme entre 0,05-0,5 mg/kg) de 17 ± 0,00 mg/kg dans les graines de maïs et 35 ± 0,03 mg/kg dans les tubercules. Le niveau de pollution très avancé des zones humides de Douala affecte directement la qualité nutritive des plantes cultivées et montre qu’il serait souhaitable que les populations et les pouvoirs publics prennent conscience des conséquences de ces pollutions sur la santé humaine.
Author Keywords: métaux toxiques, patate, maïs, Zones humides, Kambo, Longmayagui.
How to Cite this Article
Marie Louise BA’ANA ETOUNDI, Gildas Parfait NDJOUONDO, Roland Didier NWAMO, Henri FANKEM, and Siegfried Didier DIBONG, “EVALUATION OF THE CONTENTS OF SOME CHEMICAL PARAMETERS ON THE NUTRITIONAL QUALITY OF Ipomoea batatas (SWEET POTATO) AND Zea mays (CORN) GROWN IN THE WETLANDS OF KAMBO AND LONGMAYAGUI RIVERS (DOUALA),” International Journal of Innovation and Scientific Research, vol. 33, no. 1, pp. 56–69, October 2017.
