Effet de Différentes Doses d’Engrais Minéraux sur le Rendement de deux Variétés de Patate Douce [Ipomoea batatas (L) Lam] à Bouaké, Centre de la Côte d'Ivoire

L'étude a été conduite sur deux campagnes (2015/2016 et 2016/2017) afin d’évaluer l’effet de l’apport d’engrais minéraux (NPK 15-15-15 et 12-22- 22) sur le rendement de deux variétés de patate douce à Bouaké. L’essai a été conduit selon un dispositif expérimental split-plot comportant deux variétés de patate douce (Tib-440060 et Irene) et cinq niveaux de fertilisation (0, 200, 300, 400, 500 kg/ha) en trois répétitions. Les résultats ont montré que les engrais minéraux ont eu un effet positif sur les composantes du rendement des racines tubéreuses. Les résultats de l'étude ont également montré que l'apport d'engrais minéraux n’a pas modifié les paramètres organoleptiques mesurés à savoir le goût, l’aspect, la cuisson et la contenance en eau de la patate douce. La variété Irene semble plus s’accommoder à la fertilisation minérale par rapport à la variété Tib-440060. The study was conducted over two seasons (2015/2016 and 2016/2017) to assess the effect of mineral fertilizer inputs (NPK 15-15-15 and 12-22-22) on the yield of two sweet potato varieties in Bouaké. The test was conducted using a split-plot experimental design with two varieties of sweet potato (Tib-440060 and Irene) and five levels of fertilization (0, 200, 300, 400, 400, 500 kg/ha) in three repetitions. The results showed that mineral fertilizers had a positive effect on the yield components of tuberous roots. The results of the study also showed that the use of mineral fertilizers did not modify the organoleptic parameters measured, namely the taste, appearance, cooking and water content of the sweet potato. Irene variety seems to be more suited to mineral fertilization than the Tib-440060 variety

Sweetpotato cultivation: characteristics, constraints and preferred traits of producers and consumers in Côte d'Ivoire

International audienceAbstract Background In an environment where the adoption of improved varieties resulting from plant breeding programs is limited, it is essential to identify end‐user preferences beforehand. A participatory survey was conducted in eight localities in Korhogo and Bouaké regions (central and northern Cote d'Ivoire respectively) to identify producers' preferences and increase the adoption of improved varieties. The study involved 160 producers and consumers through focus group discussions and individual interviews. Results Sweetpotato is mostly grown on small plots (<1 ha) of land (89.2%), with women (66%) as the main producers. In the Bouaké region, sweetpotatoes are grown on mounds (100%), whereas in Korhogo they are grown on ridges (86.2%). The main food products or forms of preparation from roots are fries (34.7%), boiled (34.3%), mashed (12.4%), and sweetpotato stew (9.1%). Major constraints, including low price of roots (26.3%), low productivity (16.2%), and post‐harvest storage issues (14.5%), were identified as affecting sweetpotato production. Conclusions The selection of new varieties should be oriented towards high‐yielding varieties with high dry matter content, deployed stems, and roots of round, oblong, or elliptical shape with good culinary characteristics (dry matter, sweet taste, dry texture, absence of fiber). Plants must be drought resistant, be tolerant to poor soil, diseases, and pests, and have a good yield. The color of skin and flesh of the sweetpotato, although constituting criteria of choice, are not essential for the acceptance or the rejection of a variety by users. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry