In Côte d’Ivoire, plantain is a widely consumed food. It’s grown in all humid agroecological areas of the country. Despite its adaptation to these areas, plantain production remains insufficient on the coast of cultivation soils salinization. This study aimed to improve plantain production in coastal area of ​​Côte d’Ivoire by obtaining vivo-plants. It was conducted to evaluate agronomic performance of plantain vivo-plants from environments treated with increasing solutions of NaCl (0, 5, 10 and 15 g/l) and Sargassum natans (25, 50 and 100%). Two-month-old plants were transferred to plots developed in Azaguié locality and some production and yield parameters were evaluated. Results showed that time interval between planting and flowering and production cycle were short in plants from environments treated with S.natans (50 and 100%) and NaCl (5 and 10g/L) solutions. Average mass of bunches and middle finger varied according to plants from different treatments. However, the best yields were obtained with T 50% concentration of S. natans extract (18.33 t/ha) and 5g/L of NaCl solution (16.32 t/ha) compared to control (14.35 t/ha). In conclusion, concentrations of 5 g/L of NaCl solution and T 50% of S. natans extract can be used to evaluate tolerance of plantains to soil salinity to improve yield.

The main objective of this study is to assess the level of contamination, in trace elements (cadmium, copper, zinc, lead, nickel), of amaranth and lettuce grown on the market gardens of Marcory and Cocody and on the experimental plot of the University Nangui Abrogoua in the city of Abidjan (Ivory Coast). On the 3 sites, each species accumulate metals differently. Concentrations of metals in plants are influenced by the level of their presence in soil and the atmospheric depositions. The leaves of lettuce accumulated more Zn than those of amaranth on the 3 sites. On all the sites, the leaves of both species are unfit for human consumption because having contained lead, zinc and nickel above the recommended norms.